JPH1023157A - Hotline incomplete avoidance method - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To avoid incomplete hotline communication in a switching network without impairing the convenience of hotline subscribers. SOLUTION: In a switching network (100) having a hotline function (101), a hotline subscriber (20) is provided.
0 ₁ ) is registered in advance with a connection type to be applied when a hotline call cannot be set up, and if the call cannot be set up when the hotline subscriber initiates a call, the hotline subscriber is notified. A connection type registration means (102) for connecting according to a registered connection type is provided, or a connection type selection means (10) for connecting according to a connection type selected by a hotline subscriber from a plurality of predetermined connection types.
3) providing, or Chakukanyu (200 ₂₎ during the call, other subscribers hotline subscriber selects (20
Calling destination changing means (10) for changing the destination to (0)
4) is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hotline incompletion avoidance method, and more particularly, to a hotline service provided in a switching network in which a hotline call is not completed due to a busy or unanswered call. The present invention relates to a hot line incompletion avoidance method for preventing.

[0002]

2. Description of the Related Art A hot line function is widely used as one of the functions provided by a switching network. The hot line function corresponds to a subscriber who uses the hot line function (hereinafter, referred to as a hot line subscriber), registers and registers the incoming subscriber in advance, and registers when the hot line subscriber calls. , Without transmitting a called subscriber number, and is widely installed between subscribers who make emergency calls or close communication.

FIG. 21 is a diagram illustrating a conventional exchange. FIG. 21 shows a single exchange (1) having the hot line function as an example of an exchange network having the same function.

In FIG. 21, an exchange (1) accommodates a plurality of subscribers (2) and has a network (11),
It comprises a central control unit (12), a main storage unit (13), an auxiliary storage unit (14), a plurality of subscriber circuits (15), and a tone generator (16).

In the central control unit (12), a hot line function unit (121) for executing a hot line function for each accommodated subscriber (2) is provided, and an auxiliary storage device (14).
Inside, subscriber data (SDB) for storing attributes of each accommodated subscriber (2) is provided corresponding to each subscriber (2).

For example, the subscriber (2 ₁ ) is replaced by the subscriber (2 ₂ )
In order to register as a hot-line subscriber, a service terminal to be registered [= hot-line service], a subscriber number to be registered [= telephone number (DN ₁ ), for example, from a maintenance terminal or the like (not shown) ], And a service order including a called subscriber number [= telephone number (DN ₂ )] and the like.

[0007] The central control unit (12) receives and analyzes the input service order, and when identifying it as a hotline subscriber registration request, activates the hotline function unit (121) and checks the input service order. introduce.

The activated hot line function unit (121)
Extracts the subscriber number to be registered (DN ₁ ) and the called subscriber number (DN ₂ ) from the transmitted service order, and extracts the subscriber number to be registered (= telephone number () in the auxiliary storage device (14). DN ₁₎₎ in reference to the subscriber data provided in correspondence (SDB _1), set the hotline subscriber information (HLS) in a logic "1" indicating that the hotline subscriber, also The telephone number (DN ₂ ) is stored as the called subscriber number (DN _D ).

In this state, when the hot line subscriber (2 ₁ ) makes a call, in the exchange (1), the central control unit (12) detects the call of the subscriber (2 ₁ ), and the auxiliary storage device. The subscriber data (SDB ₁ ) corresponding to the calling subscriber (2 ₁ ) in (14) is extracted and analyzed, and it is confirmed that the hot line subscriber information (HLS) has been set to logic “1”. Upon identification, the calling subscriber (2 ₁ ) is recognized as a hot line subscriber, and the hot line function unit (12) is recognized.
Start 1).

The activated hotline function unit (121)
Extracts the registered subscriber number (DN _D ) [= DN ₂ ] registered in the subscriber data (SDB ₁ ), and
2).

[0011] Thereafter the central control unit (12) performs a known call set-up process, attempts to select and capture Chakukanyu's (2 _2), confirming that the Chakukanyu's (2 ₂₎ is vacant Up,
When the called subscriber (2 ₂ ) is called and the called subscriber (2 ₂ ) answers, the network (11) is controlled to connect the hot line subscriber (2 ₁ ) and the called subscriber (2 ₂ ).

As described above, the subscriber (2)₁)
Trial service can be provided. But the subscriber
(2₁) Is a subscriber of exchange (1),
In subscribers (2₁Other than the hotline connection from
Calls can be freely sent and received via the exchange (1),
Trine subscribers (2₁) Is called and the called subscriber (2
_Two) Is another subscriber (2) [for example, subscriber (2)_Three)]
There may be cases when it is busy.

In such a case, the central controller (12) cannot set up a hot line connection between the hot line subscriber (2 ₁ ) and the destination subscriber (2 ₂ ), and the network (11)
Is connected to the hot line subscriber (2 ₁ ) and the signal tone generator (16), and the busy tone (BT) generated by the signal tone generator (16) is transmitted to the hot line subscriber (2 ₁ ). Will be returned.

When the hot line subscriber (2 ₁ ) originates a call, and the incoming subscriber (2 ₂ ) does not answer even if it is in a ringing state due to absence or the like, the hot line subscriber (2 ₁ ) (2 ₁ ) waits for the answer of the called subscriber (2 ₂ ) while listening to the ringing tone (RBT), and if no answer is made for a long time, releases the call once and then releases another subscriber (2 2). ), There was no other way.

[0015]

As is apparent from the above description, in a conventional switching network, when a hotline subscriber (2 ₁ ) calls, a hotline connection is not always established. However, the incoming subscriber (2 ₂ ) was busy or absent, so the hotline connection could not be set up, and there was a problem that the expected emergency call or close communication was hindered.

In order to solve such a problem, an invention called "abnormal call apparatus using telephone exchange" (Japanese Patent Laid-Open No. 61-1110)
50, published May 29, 1986) [hereinafter referred to as prior application].

Briefly explaining the above-mentioned prior application, when a hotline subscriber calls, the exchange returns a dial tone and maintains the receiving state of the called subscriber number. If the subscriber does not send the incoming telephone number, a hotline connection is made to the called subscriber using the registered subscriber number corresponding to the hotline subscriber in advance, and when the called subscriber answers, The telephone number of the calling subscriber can be displayed on the telephone of the called subscriber.

However, according to the above-mentioned prior application, the hotline subscriber tries to establish a hotline connection, and if the incoming subscriber is busy or unanswered and hotline communication is not possible, the hotline subscriber can communicate with another subscriber. If you want to make a call, you need to release the hotline call, call it again, and select another desired subscriber number while listening to the dial tone. However, this is not always effective in solving the above-mentioned problems, and also results in an undesirable result that the number of lost calls increases for the exchange.

An object of the present invention is to avoid incomplete hotline communication as much as possible without impairing the convenience of hotline subscribers.

[0020]

FIG. 1 is a diagram illustrating the principle of the present invention. In FIG. 1, reference numeral 100 denotes a switching network to which the present invention is applied, and 200 denotes a subscriber accommodated in the switching network (100).
200 ₁ hot line subscribers using the hot line service, 200 ₂ hot line subscriber (200 ₁₎
Registered subscriber corresponding to the switching network 101, the switching network (10
This is a hot line function (101) included in 0).

Reference numeral 102 denotes a switching network (100) according to the present invention.
This is a connection type registration means provided in. 103 is a connection type selection means provided in the switching network (100) according to the present invention.

104 is a switching network (100) according to the present invention.
Is a calling destination changing means provided during the call. Hotline function (101), a hot line subscriber (200 ₁₎
There when calling, without performing the selection operation of Chakukanyu's number, to connect to the hot line subscriber destination subscriber registered in advance in correspondence to the (200 ₁₎ (200 _2).

The connection type registering means (102), the connection type to apply when the hotline subscriber (200 ₁₎ was encountered not configurable hotline call, in response to the hotline subscriber (200 ₁₎ previously registered Place, when the hotline call becomes impossible set when hotline subscriber (200 ₁₎ originates a call, the connection type that is registered in correspondence with the hotline subscriber (200 ₁₎ accordingly connects the call hotline subscriber (200 ₁₎ [claim 1].

[0024] Incidentally connection type registering means (102) is an unconditional interrupt other subscriber (200) and destination subscriber during a call to (200 _2), be registered as connection type is considered [ Claim 2].

Further connection type registering means (102), after the other subscriber (200) and destination subscriber during a call (200 ₂₎ is call termination, hotline subscription waiting to temporarily release the call (200 ₁₎ and sequentially calls and the deposition subscriber after call ends (200 _2), a call Kaemachi registration to set the hotline call is considered to be registered as a connection type [claim 3 ].

[0026] connection type registering means (102) receives the telephone number of Chakukanyu (200 ₂₎ of the hotline subscriber encountered busy (200 ₁₎ other subscribers to select the (200) In addition, it is considered to register a change of a destination to which an incoming connection is attempted to another subscriber (200) as a connection type [claim 4].

The connection type registration means (102) registers the destination change as a connection type according to claim 4, and furthermore, when the destination subscriber (200) after the change is busy, further adds the hotline subscriber (200). 2001 ₁ ) selected another subscriber (20
It is considered that it is possible to repeatedly execute the change of the destination to try the incoming connection to 0) [claim 5].

The connection type registration means (102) receives the hot-line call interruption notification, and
0 _2), from among a plurality of connection form predetermined a called side control to designate a connection type hotline subscriber (200 _1), [Claim it is considered to be registered as a connection form 6 ].

The connection type registering means (102) may register the destination side control as a connection type according to claim 6.
As a plurality of predetermined connection types, the receiving subscriber (20
0 ₂₎ Interrupt acceptable to, Chakukanyu (200 ₂₎ call termination after a call Kaemachi registration, and in the call forwarding to select another subscriber (200) as a transfer destination subscriber (200) It is considered that an arbitrary plural number is set in advance [claim 7].

The connection type registration means (102) has registered the receiving side control as the connection type according to claim 7.
Chakukanyu (200 ₂₎ specifies a call forwarding, call to another subscriber selected destination subscriber (200) in the case of busy, further wearing a subscriber (200 ₂₎ has been selected (200) It is considered that the call transfer for which the transfer is attempted can be repeatedly executed [claim 8].

The connection type selection means (103), a hot line subscriber (200 ₁₎ If you encounter a non setting hotline call, hotline subscribers from a plurality of connections form a predetermined (200 requesting selection of a desired one connection type _1), according to the connection form hotline subscriber (200 ₁₎ is selected, a call hotline subscriber (2
00 ₁₎ connecting the [Claim 9].

[0032] Note that the connection type selecting means (103), a plurality of connection type presented by claim 9 hotline subscriber (200 _1), unconditional interrupt according to claim 2,
It is considered that an arbitrary plural number is predetermined from the call return registration described in claim 3, the destination change according to claim 4, and the destination control described in claim 6. [Claim 10 ].

The ringing destination changing means (104), a call hotline subscriber (200 ₁₎ is Chakukanyu's (20
0 ₂₎ during the call, when detecting that executes a boot operation predetermined, stop call Chakukanyu (200 _2), a hot line subscriber Following start operation (200
_The destination is changed to another subscriber (200) specified by the telephone number transmitted from ₁ ) [Claim 11].

The calling destination changing means (104) during the call includes:
Hotline subscriber (200 ₁₎ destination subscriber after the specified changes have a (200) during the call by claim 11, further hotline subscriber (200 ₁₎ another subscriber-specified to (200) It is considered that it is possible to repeatedly execute the change of the destination for attempting the incoming connection [claim 12].

Accordingly, when a hotline subscriber requests a hotline call and makes a call, and the called subscriber is busy or unanswered and cannot make a hotline call, the hotline call is not released and registered in advance. Based on the established connection type, immediately interrupt unconditionally interrupt the called subscriber, or automatically wait for a call back after the called party ends, change the incoming call to another subscriber, and make a call Select the connection type to be executed from the above-mentioned multiple connection types when the incoming call is not possible without leaving the incoming control to the incoming subscriber or registering the connection type beforehand. By doing so, it is possible to execute a registered or specified connection format without releasing the hotline call once, greatly improving the convenience of the hotline service and improving the connection completion rate of the switching network. That.

[0036]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a diagram showing an exchange according to an embodiment of the present invention, FIG. 3 is a diagram illustrating a hot line connection process in FIG. 2, and FIG. 4 is a diagram illustrating a registered connection format correspondence process in FIG. FIG. 5 is a diagram exemplifying the reception-side access code corresponding process in FIG.
FIG. 6 is a diagram exemplifying the incoming call destination change process in FIG. 3, FIG. 7 is a diagram exemplifying the reception destination access code corresponding process in FIGS. 4 and 5, and FIG. FIG. 9 is a diagram illustrating a signal sequence at the time of interruption, FIG. 9 is a diagram illustrating a signal sequence at the time of call back registration in FIG. 4, and FIG. 10 is a diagram illustrating a signal sequence at the time of changing the destination in FIG. FIGS. 11 and 12 are FIGS.
FIG. 12 is a diagram exemplifying a signal sequence at the time of interruption permission in FIG. 4, FIG. 12 is a diagram exemplifying a signal sequence at the time of call return registration in FIGS. 4 and 7, and FIG. It is a diagram illustrating a signal sequence at the time,
FIG. 14 is a diagram exemplifying a signal sequence at the time of unconditional interruption in FIG. 5, FIG. 15 is a diagram exemplifying a signal sequence at the time of call return registration in FIG. 5, and FIG. FIG. 17 is a diagram exemplifying a signal sequence at the time of change, FIG. 17 is a diagram exemplifying a signal sequence when interrupts are permitted in FIGS. 5 and 7, and FIG. FIG. 4 is a diagram illustrating a signal sequence,
FIG. 19 is a diagram illustrating a signal sequence at the time of call transfer in FIGS. 5 and 7, and FIG. 20 is a diagram illustrating a signal sequence in FIG. The same reference numerals indicate the same objects throughout the drawings.

In FIG. 2, the switching network (1
00), a single switch (1) is shown and FIG.
A subscriber (2) is shown as a subscriber (200) in FIG. 1, and a hot line function unit (1) in the central control unit (12) is shown as a hot line function (101) in FIG.
21), and hotline subscriber information (HLS) is stored in subscriber data (SDB) provided for each subscriber (2) accommodated in the auxiliary storage device (14).
And a storage area for the destination subscriber number (DN _D ). A connection type registration unit (122) is provided in the central control unit (12) as the connection type registration means (102) in FIG. In the subscriber data (SDB), there is provided a registration area of the called-side busy time connection type (BCT), and the connection type selection means (103) in FIG. In the connection format selection section (12
3) is provided, and a calling destination change unit (124) is provided as the calling destination changing means (104) in FIG.

The network (11) includes a voice response section (17) and a three-way trunk (18) in addition to the signal tone generation section (16). The connection mode registration means (102) in FIG. It is added to play the role of the means (103) and the calling destination change means (104).

First, an embodiment of the present invention (claims 1 and 2) will be described with reference to FIG. 2, FIG. 3, FIG. 4, and FIG.
In an embodiment of the present invention (claims 1 and 2), a hot line function unit (121) in a central control unit (12) includes:
Only the connection type registration unit (122) is used.

In this state, a service order for registering the subscriber (2 ₁ ) as a hot line subscriber with the subscriber (2 ₂ ) as a destination is input from a maintenance terminal or the like (not shown). .

The input service order includes a registered service type [= hotline service], a registration target subscriber number [= subscriber (2 ₁ ) telephone number (DN ₁ )], and a destination subscriber number (DN _D). ) [= telephone number of the subscriber ₍₂ 2) (D
N ₂ )], and the destination-side busy-time connection type (BCT) [this time unconditional interrupt (IRT)] is specified.

The hot line function unit (121) in the central control unit (12) receives the input service order,
Analyze and store the subscriber (2 ₁ ) in the auxiliary storage (14)
The subscriber data (SDB ₁ ) provided corresponding to [telephone number (DN ₁ )] is extracted, the hotline subscriber information (HLS) is set to logic “1”, and the called subscriber number ( DN _D ) as the telephone number (D ₂ ) of the called subscriber (2 ₂ ).
N ₂ ).

The central control unit (12) activates the connection type registration unit (122). The activated connection type registration unit (122) stores the unconditional interrupt (IRT) as the receiving-side busy-time connection type (BCT).

As described above, the central control unit (12) in the exchange (1) maintains the call receiving state [step S in FIG.
31]. In this state, hot line subscriber when (2 ₁₎ makes a call, the central control unit (12) is a subscriber (2 ₁₎
Is detected via the subscriber circuit (15 ₁ ) [step S32], and the calling subscriber (2) is stored in the auxiliary storage device (14).
_The subscriber data (SDB ₁ ) corresponding to ₁ ) is extracted and analyzed [step S33].

In the course of the analysis, the central controller (12)
It is analyzed whether or not the hotline subscriber information (HLS) in the subscriber data (SDB ₁ ) has been set to logic “1” (step S34). When it is determined that the logic has been set to logic “1”, calling subscriber (2 ₁₎ verify that the hotline subscriber, Chakukanyu's number to the subscriber data by entering hotline function section (121) (SDB ₁₎ (DN _D)
To extract the stored telephone number (DN ₂ ) (step S35).

Subsequently, the central control unit (12) analyzes the vacant / busy state with the subscriber (2 ₂ ) corresponding to the telephone number (DN ₂ ) as a destination subscriber (steps S36 and S37). Assuming that the called subscriber (2 ₂ ) is currently talking with another subscriber (2 ₃ ), the central controller (12) identifies the called subscriber (2 ₂ ) as busy.

Subsequently, the central control unit (12) analyzes whether or not the called party busy type (BCT) has already been registered in the subscriber data (SDB ₁ ) (steps S36 and S38). When it is confirmed that the side-talking connection type (BCT) has been registered, the connection-type registration unit (122) is activated to execute a process corresponding to the registered called-side talking connection type (BCT). [Step S39].

The activated connection format registration unit (122)
When the called party busy type (BCT) registered in the subscriber data (SDB ₁ ) is analyzed [FIG. 4, step S41], and it is confirmed that the unconditional interrupt (IRT) is received [step S
42 _A ], after activating the built-in timer [step S 4
3 _A ], the network (11) is controlled and the subscriber (2
The communication path between ( ₂ ) and (2 ₃ ) is led into the three-way trunk (18), and the signal tone generator (16) is connected to the three-way trunk (18), so that the signal tone generator (16) is generated. The ring tone (IIT) is superimposed on the voice of the subscriber (2 ₃ ),
Send to destination subscriber (2 ₂ ) [Steps S44 _A , S4
_5A ].

In parallel with this, a connection type registration unit (122)
Controls the network (11) to connect the hot-line subscriber (2 ₁ ) to the signal tone generator (16), and outputs the ring tone (RBT) generated by the signal tone generator (16) to the hot line. Send to subscriber (2 ₁ ).

When the timer detects the elapse of a predetermined time (T ₀ ) (time-out) in the transmission state of the ring tone (IIT) [step S 46 _A ], the connection type registration unit (1)
22) After stopping the timer [Step S47 _A ],
Controlling the network (11) and generating a signal sound (16)
By releasing the connection with the three-way trunk (18), the transmission of the ring tone (IIT) to the called subscriber (2 ₂ ) is stopped [step S48 _A ].

In parallel with this, a connection format registration unit (122)
Controls the network (11) to release the connection between the hotline subscriber (2 ₁ ) and the signal tone generator (16),
Ringtone (RBT) for hotline subscriber (2 ₁ )
After the transmission of the call is stopped, the central control unit (12) is requested to process the interrupt call from the subscriber (2 ₁ ) for the call between the subscribers (2 ₂ ) and (2 ₃ ).

The central control unit (12) executes an interrupt call process based on a known procedure, controls the network (11), and connects the hot line subscriber (2 ₁ ) to the three-way trunk (1).
8) to make the hotline subscriber (2 ₁ ) interrupt the call between the incoming subscriber (2 ₂ ) and the subscriber (2 ₃ ) [step S49 _A ].

Thereafter, the hot line subscriber (2 ₁ ) can make an interrupt call to the called subscriber (2 ₂ ), and can start a desired hot line call. Meanwhile, Chakukanyu's (2 ₂₎ of the other party subscriber (2 _3), it is also possible to listen to hotline calls from Chakukanyu's (2 ₂₎ with Hotline subscriber (2 _1), Alternatively, while the hot-line subscriber (2 ₁ ) and the destination subscriber (2 ₂ ) are performing a hot-line call, the other party (2 ₃ )
Is set to a hold state, for example, it is possible to listen to a hold sound generated by the signal sound generation unit (16).

As is apparent from the above description, according to the embodiment of the present invention (claims 1 and 2), the hot-line subscriber (2 ₁ ) can be called by the incoming subscriber (2 ₂ ) at the time of calling. Even during a call with the subscriber (2 ₃ ), it is possible to unconditionally interrupt the called subscriber (2 ₂ ) and start a desired hot-line call.

Next, an embodiment of the present invention (claims 1 and 3) will be described with reference to FIGS. 2, 3, 4 and 9. In the embodiment of the present invention (claims 1 and 3), only the hot line function unit (121) and the connection type registration unit (122) in the central control unit (12) are used as described above. .

In this state, a service for registering the subscriber (2 ₁ ) as a hot-line subscriber with the subscriber (2 ₂ ) as a subscriber from a maintenance terminal or the like (not shown) in the same manner as described above. the order registration service type [= hotline services), (phone number = subscriber (2 ₁₎ (DN _1)] registered subscriber number, Chakukanyu's number (DN
_D ) [= the telephone number (DN ₂ ) of the subscriber (2 ₂ )], and the incoming call busy type (BCT) [this time call waiting registration (CPO)] and the like are input.

Note that call return registration (CPO) is a hot line
In subscribers (2₁) Is called and the called subscriber (2_Two) Busy
If you encounter a phone number (DN₁)and
(DN _Two) Is registered and the call is released once.
(2_Two) When the call ends, the hotline subscriber
(2₁) And called subscribers (2_Two) Is called sequentially to set up a call
It is to let.

The central control unit (12), as described above,
Activate the hot line function unit (121) and the connection type registration unit (122), receive and analyze the input service order, and store the subscriber (2 ₁ ) in the auxiliary storage device (14).
Corresponding extract subscriber data (SDB ₁₎ provided in sets hotline subscriber information (HLS) in a logic "1", also wearing the subscriber number (DN _D) as destination subscriber ( 2 ₂₎ stores the telephone number (DN ₂₎ of further call Kaemachi registered when in the call-in talk connection type (BCT) (CP
O) is stored.

As described above, the central control unit (12) in the exchange (1) maintains the call accepting state as described above (step S31 in FIG. 3). In this state, when the hot line subscriber (2 ₁ ) makes a call, the central controller (12) detects the call of the subscriber (2 ₁ ) via the subscriber circuit (15 ₁ ) [Step S32]. , The subscriber data (SD) corresponding to the calling subscriber (2 ₁ ) from the auxiliary storage device (14).
B ₁₎ to extract and analyze [Step S33], the subscriber data (SDB ₁₎ hotline subscriber information in (HLS)
Has been set to logic "1", it is confirmed that the calling subscriber (2 ₁ ) is a hot line subscriber [step S34], and the hot line function section (121) is activated. The stored telephone number (DN ₂ ) is extracted as the called subscriber number (DN _D ) [step S35].

Subsequently, the central control unit (12) analyzes the idle / busy state of the called subscriber (2 ₂ ) in the same manner as described above (steps S36 and S37), and currently talks with the other subscriber (2 ₃ ). When it is determined that the caller is in the busy state, it is analyzed whether or not the called party busy type (BCT) is already registered in the subscriber data (SDB ₁ ) (steps S36 and S38), and the call is awaited. When it is confirmed that the registration (CPO) has been registered, the connection type registration unit (122) is activated, and the process corresponding to the registered called-side busy connection type (BCT) is executed [step S39].

The activated connection type registration unit (122)
When the called party busy type (BCT) registered in the subscriber data (SDB ₁ ) is analyzed [FIG. 4, step S41], and it is confirmed that the call waiting registration (CPO) is made, [step S
42 _B ], controlling the network (11) to connect the hotline subscriber (2 ₁ ) with the voice response unit (17), and the voice response unit (17) generates a voice message (call back registration completion notification) ) (G _CPO ) hotline subscribers (2 ₁ )
Sends out [Step S43 _B] in respect central control unit (12), to request a call Kaemachi processing the hotline subscriber (2 ₁₎ and destination subscriber (2 ₂₎ [Step S44
_B ].

Voice message (call back registration completion notification)
(G _CPO ) is a message informing that the call return waiting call by the hotline subscriber (2 ₁ ) and the destination subscriber (2 ₂ ) has been registered, and the call is temporarily released and waited.

Voice message (call back registration completion notification)
Hotline subscribers (2 ₁ ) who heard (G _CPO )
The handset is released to release the hotline call, and the called subscriber (2 ₂ ) automatically sets up the hotline call after the end of the call and waits for it to be called.

The central control unit (12) is provided with a known call waiting process.
As a result, hotline subscribers (2 ₁) Phone number (D
N₁) And the receiving subscriber (2_Two) Telephone number (DN_Two) And
While registering as a call return call, the called subscriber (2_TwoEnd of)
Began monitoring the talk and the incoming subscriber (2_Two) Detect end call
And the called subscriber in accordance with the well-known call return call setting procedure.
(2_Two) And join the hotline registered for call waiting registration
Person (2₁) And the hotline subscriber (2₁)
If answered, then the incoming subscriber (2_Two) And the called subscriber
(2_Two) Responds and controls the network (11)
And both subscribers (2₁) And (2)_Two) Set up call path between
Then, a desired hotline call can be started.

As is apparent from the above description, according to the embodiment of the present invention (claims 1 and 3), the hot-line subscriber (2 ₁ ) is set so that the incoming subscriber (2 ₂ ) can make another call when calling. Even during a call with the subscriber (2 ₃ ), call return registration processing is executed, and after the called subscriber (2 ₂ ) ends the call, a hot line call is automatically set, and a desired hot line call is made. Can be started.

Next, an embodiment of the present invention (claims 1, 4, and 5) will be described with reference to FIGS. 2, 3, 4, and 10. FIG. In the embodiment of the present invention (claims 1, 4, and 5), only the hot line function unit (121) and the connection type registration unit (122) in the central control unit (12) are used as described above. Is done.

In this state, a service for registering the subscriber (2 ₁ ) as a hot-line subscriber with the subscriber (2 ₂ ) as a destination subscriber from a maintenance terminal or the like (not shown) in the same manner as described above. as the order, the registration service type [= hotline services), (phone number = subscriber (2 ₁₎ (DN _1)] registered subscriber number, Chakukanyu's number (DN
_D ) [= The telephone number (DN ₂ ) of the subscriber (2 ₂ )], and the incoming call busy type (BCT) [this time, change destination (DCH)], etc. are input.

The central control unit (12), as described above,
Activate the hot line function unit (121) and the connection type registration unit (122), receive and analyze the input service order, and store in the auxiliary storage device (14) the hot line subscriber (2 ₁ ). The subscriber data (SDB ₁ ) provided by the user is extracted and the hotline subscriber information (HL) is extracted.
S) is set to logic "1" and the called subscriber number (D
Storing destination subscriber (2 ₂₎ telephone number (DN ₂₎ as N _D), further stores the destination change (DCH) as a call-in Busy connection type (BCT).

As described above, the central control unit (12) in the exchange (1) maintains the call accepting state as described above (step S31 in FIG. 3). In this state, when the hotline subscriber (2 ₁ ) makes a call, the central controller (12)
Detects the call of the subscriber (2 ₁ ) via the subscriber circuit (15 ₁ ) (step S32), and the auxiliary storage device (14)
From the subscriber data (SD) corresponding to the calling subscriber (2 ₁ )
B ₁₎ to extract and analyze [Step S33], the subscriber data (SDB ₁₎ hotline subscriber information in (HLS)
Is set to logic "1", it is confirmed that the calling subscriber (2 ₁ ) is a hot line subscriber (step S34), and the hot line function section (121) is activated. The stored telephone number (DN ₂ ) is extracted as the called subscriber number (DN _D ) (step S35).

Subsequently, the central control unit (12) analyzes the idle / busy state of the called subscriber (2 ₂ ) in the same manner as described above (steps S36 and S37), and currently talks with the other subscriber (2 ₃ ). When it is determined that the caller is in a busy state, it is analyzed whether the called party busy mode (BCT) is already registered in the subscriber data (SDB ₁ ) (steps S36 and S38), and the destination is changed. When it is confirmed that (DCH) is already registered, the connection type registration unit (122) is activated, and processing corresponding to the registered called-side busy type (BCT) [= change destination (DCH)] is performed. Is executed [step S39].

The activated connection format registration unit (122)
Subscriber data (SDB₁Called-side busy type registered in)
The equation (BCT) is analyzed (FIG. 4, step S41), and this time
Confirms that the destination is changed (DCH)
Step S42_C], Controlling the network (11)
Trine subscribers (2₁) And voice response unit (17)
Guidance message generated by the voice response unit (17)
J (Change destination) (G _DCH) To hotline subscribers (2
₁) And hotline subscribers (2₁) Or
From the new subscriber number (DN_C) Is sent,
Renewal subscriber number (DN_C) Can be received
[Step S43_C]. Guidance message (received
Change) (G_DCH) Is the subscriber of the hotline call
(2_Two) Is busy, so change the connection to another subscriber (2).
If desired, do not release the call, but
User number (DN_C).

Guidance message (change of destination) (G
_DCH ), the hotline subscriber (2 ₁ ) wishes to connect to the subscriber (2 ₄ ) instead of the predetermined destination subscriber (2 ₂ ), and changes the subscriber number (DN _C ) to the new subscriber. When the telephone number (DN ₄ ) of the subscriber (2 ₄ ) is selected, the connection type registration unit (122) in the accepting state of the destination subscriber number (DN _C ) receives the hotline subscriber (2 ₁ ). The transmitted subscriber number (DN _C ) [= (DN ₄ )] is received [step S44 _C ], and the received telephone number (D
N _C ) [= (DN ₄ )] to the central controller (12), requesting that the destination of the hotline call be changed from the called subscriber (2 ₂ ) to the subscriber (2 ₄ ). [Step S
45 _C ].

The central control unit (12), based on a known call processing procedure, changes the destination subscriber number (DN _C ) [= (D
N _4)] selects and captures, transmits a call signal through the change destination subscriber (2 ₄₎ corresponding subscriber circuit (15 ₄ in), the hotline subscriber (2 ₁₎ network ( 1
1) is connected to the signal tone generator (16) to send out a ring tone (RBT) generated by the signal tone generator (16);
When the subscriber (2 ₄ ) responds, the network (11) is controlled to set a communication path between the hot line subscriber (2 ₁ ) and the new subscriber (2 ₄ ), and the hot line subscriber is set up. In (2 ₁ ), it is possible to start a desired hotline call to the new subscriber (2 ₄ ).

When the central control unit (12) selects the new subscriber (2 _C ) [= (2 ₄ )], the subscriber (2
₄₎ in the case of busy [Step S46], it starts again the connection type registration unit (122), by executing the step S43 and subsequent _C, still other modifications destination hotline subscriber (2 ₁₎ The subscriber number (DN _C ) can be selected.

As is apparent from the above description, according to the embodiment of the present invention (claims 1, 4, and 5), the hot-line subscriber (2 ₁ ) can call the incoming subscriber (2 ₂ ) when calling. Even during a call with another subscriber (2 ₃ ), the destination subscriber (2 _C ) [= (2 ₄ )] can be selected as the hot line subscriber (2 ₁ ), and the incoming subscriber (2 ₃ ) can be selected. _A hotline call can be set up with a desired subscriber (2 ₄ ) other than ₂ ).

Next, embodiments of the present invention (claims 1, 6, 7, and 8) will be described with reference to FIGS. 2 to 4 and FIGS. 11 to 13. In an embodiment of the present invention (claims 1, 6, 7, 8), the central control unit (12)
Only the hot line function unit (121) and the connection type registration unit (122) are used.

In this state, a service for registering the subscriber (2 ₁ ) as a hot-line subscriber with the subscriber (2 ₂ ) as a destination subscriber from a maintenance terminal or the like (not shown) in the same manner as described above. as the order, the registration service type [= hotline services), (phone number = subscriber (2 ₁₎ (DN _1)] registered subscriber number, Chakukanyu's number (DN
_D ) [= the telephone number (DN ₂ ) of the subscriber (2 ₂ )], and the called-side busy-time connection type (BCT) [this time called-side control (D
ST)].

The central control unit (12), as described above,
Activate the hot line function unit (121) and the connection type registration unit (122), receive and analyze the input service order, and store in the auxiliary storage device (14) the hot line subscriber (2 ₁ ). The subscriber data (SDB ₁ ) provided by the user is extracted and the hotline subscriber information (HL) is extracted.
S) is set to logic "1" and the called subscriber number (D
Storing the telephone number of the destination subscriber ₍₂ 2) (DN 2) as N _D), and stores the callee control (DST) as a further time in the receiving-side spoke connection type (BCT).

The terminating side control (DST) means that when a hotline subscriber (2 ₁ ) originates a call and encounters the busy side of the incoming subscriber (2 ₂ ), the incoming subscriber (2 _In response to ₂ ), the desired called party busy mode (BCT) desired by the called subscriber (2 ₂ ) is selected from the predetermined called party busy mode (BCT) including the hotline call interruption. In this case, as a predetermined called-side busy time connection type (BCT) that can be selected by the called subscriber (2 ₂ ), this time, “interruption permitted” during a hot-line call communication, "Call waiting registration" described above
And, it is preparing three types of the "call forwarding" to call forwarding Chakukanyu's (2 ₂₎ other subscribers that you specify to (2).

Further, the called subscriber (2 ₂ ) is prepared to select a desired called-side busy-time connection type (BCT) from the three types of called-side busy-time connection types (BCT). The destination access code (ACD _D ) [= “1”, “2” and “3”, where “1” indicates a decimal number, corresponding to the three types of destination-side busy time connection types (BCT), The same applies to the following), and the called subscriber (2 ₂ ) establishes the connection mode (B
When "interrupt allowance" is selected as the CT), "1" is selected as the called-side access code (ACD _D ), and "call return registration" is selected as the called-side busy connection type (BCT). In this case, "2" is selected as the called party access code (ACD _D ), and when "Call transfer" is selected as the called party busy type (BCT), the called party access code (ACD _D ) is used. “3” shall be selected.

As described above, the central control unit (12) in the exchange (1) maintains the call accepting state as described above (step S31 in FIG. 3). In this state, when the hotline subscriber (2 ₁ ) makes a call, the central controller (12)
Detects the call of the subscriber (2 ₁ ) via the subscriber circuit (15 ₁ ) (step S32), and the auxiliary storage device (14)
From the subscriber data (SD) corresponding to the calling subscriber (2 ₁ )
B ₁₎ to extract and analyze [Step S33], the subscriber data (SDB ₁₎ hotline subscriber information in (HLS)
Has been set to logic "1", it is confirmed that the calling subscriber (2 ₁ ) is a hot line subscriber [step S34], and the hot line function section (121) is activated. The stored telephone number (DN ₂ ) is extracted as the called subscriber number (DN _D ) [step S35].

Subsequently, the central control unit (12) analyzes the idle / busy state of the called subscriber (2 ₂ ) in the same manner as described above (steps S36 and S37), and talks with the other subscriber (2 ₃ ) at present. When it is determined that the caller is in a busy state, it is analyzed whether the called party busy mode (BCT) is already registered in the subscriber data (SDB ₁ ) (steps S36 and S38), and the destination is changed. When it is confirmed that (DCH) has been registered, the connection type registration unit (122) is activated, and the process corresponding to the registered called-side busy type (BCT) is executed [step S39].

The activated connection format registration unit (122)
When the called party busy type (BCT) registered in the subscriber data (SDB ₁ ) is analyzed [FIG. 4, step S41], and it is confirmed that the destination side control (DST) is performed [step S4].
_2D ], controlling the network (11) to control the subscriber (2
_The voice communication path between ( ₂ ) and (2 ₃ ) is drawn into the three-way trunk (18), and the voice response unit (17) is connected to the three-way trunk (18), so that the voice response unit (17) generates a guidance message. (interrupt warning) to (G _IRT), superimposed on the voice of the subscriber (2 _3), and sends the Chakukanyu's (2 ₂₎ [step S43 _D].

Guidance message (interruption warning) (G
_IRT ) first listens to the interrupt beep for a set period of time,
Notifying that the hotline subscriber (2 ₁ ) wants a hotline call, and when the hotline call is “interrupted”, the called-side access code (ACD _D )
= "1", call-side access code (ACD _D ) = "2" for hot-line call "call back registration", call-side access code for hot line call "call transfer" (ACD _D ) = “3” is a message prompting selection without releasing each call.

[0085] connection type registration unit (122), a guidance message (interrupt warning) causes sent the (G _IRT), Chakukanyu's (2 ₂₎ from the called side access code (ACD
_D ) is transmitted, the destination access code (ACD)
_D ) Receivable state is set [Step S4
_4D ].

At the same time, the connection type registration unit (122)
Controls the network (11) to connect the hot-line subscriber (2 ₁ ) to the signal tone generator (16), and outputs the ring tone (RBT) generated by the signal tone generator (16) to the hot line. Return to the subscriber (2 ₁ ).

Guidance message (interrupt warning) (G
_When the hot line subscriber (2 ₁ ) that has heard the _IRT ) selects any of “1” to “3” as the called side access code (ACD _D ), the connection type registration unit (122) sets the hot line The receiving side access code (ACD _D ) transmitted from the party (2 ₁ ) is received [Step S45 _D ], and the processing corresponding to the received receiving side access code (ACD _D ) is performed in the process shown in FIG. Execute [Step S4
_6D ].

First, the called subscriber (2 ₂ ) receives the subscriber (2 ₄ ).
It is assumed that the receiving-side access code (ACD _D ) = “1” is selected in order to allow the interruption of the hot line call in the communication with the user. The connection type registration unit (122) receives the called side access code (ACD _D ) sent from the called subscriber (2 ₂ ).
Analyzed [7, step S71] and identifies that it is a "1", check shall be "acceptable interrupt" hotline call [Step S72 _A] in the same manner as described above, the subscriber (2 ₃ ) The called subscriber (2 ₂ ) who is talking on the phone is given a predetermined time (T
_0), the other party subscriber an incoming call display tone (IIT) (2 ₃₎
After sending superposed of the speech, and sends the Chakukanyu's Caller tone for (2 ₂₎ (IIT), after the transmission of the ringing tone (RBT) is stopped against hotline subscriber (2 ₁₎ , The central control unit (12) and the subscriber ( ₂₂ )
Request processing of an interrupt call from the subscriber (2 ₁ ) for the call between (2) and (2 ₃ ).

The central control unit (12) executes an interrupt call process based on the same procedure as described above, and
To connect the hotline subscriber (2 ₁ ) to the three-way trunk (18), and make a call between the destination subscriber (2 ₂ ) and the subscriber (2 ₃ ), and the hot line subscriber (2 ₁ ). Is interrupted [step S73 _A ].

Thereafter, the hot line subscriber (2 ₁ ) can make an interrupt call to the called subscriber (2 ₂ ) and can start a desired hot line call. In the meantime, the called subscriber (2 ₃ ) of the called subscriber (2 ₂ )
It is also possible to listen to the hotline call from the hotline subscriber (2 ₁ ) together with the incoming subscriber (2 ₂ ), or if the hotline subscriber (2 ₁ ) and the incoming subscriber (2 ₂ ) are hot. During the execution of the line call, the other party (2 ₃ ) is put on hold and, for example, the signal tone generator (16)
Can be heard.

As described above, the hotline subscriber (2 ₁ )
Is, in the case Chakukanyu person at the time of call (2 ₂₎ is busy with other subscribers (2 _3), in the case where Chakukanyu's (2 ₂₎ has selected the "interrupt acceptable", wearing Subscriber (2 ₂ ) and other subscribers (2
₃ ) Interruption of the call with, and the desired hotline call can be started.

Next, the incoming subscriber (2_Two) But hotline call
In order to "call back registration", the access code (AC
D_D) = "2" is selected. Connection format registration section (1
22) is the called subscriber (2_Two)
Scord (ACD_D) Is received and analyzed [Step S7
1], if it is identified as "2", the hotline call
Is confirmed as "call return registration" (step S7).
2 _B], Controlling the network (11), and
_Two) And subscribers (2_Three) And restore the call path.
Internet subscribers (2₁) And the voice response unit (17)
Followed by a voice message generated by the voice response unit (17)
(Call return registration completion notification) (G_CPO) Hotline subscription
Person (2₁) And then sent to the central control unit (12).
Request the same call return registration processing as described above [step
S73_B].

Voice message (call back registration completion notification)
Hotline subscribers (2 ₁ ) who heard (G _CPO )
The handset is released to release the hotline call, and the called subscriber (2 ₂ ) automatically sets up the hotline call after the end of the call and waits for it to be called.

[0094] The central control unit (12), and phone number of the hot line subscriber _{(2 1) (DN 1)} , registers the telephone number of Chakukanyu's ₍₂ 2) (DN 2) as Kokae Machiko At the same time, the termination of the called subscriber (2 ₂ ) is monitored, and when the termination of the called subscriber (2 ₂ ) is detected, the hot-line subscriber (2 ₁₎ is set according to a known call-back call setting procedure. ) And the called subscriber (2 ₂ ) are sequentially called, and when both subscribers (2 ₁ ) and (2 ₂ ) answer, the network (11) is controlled to control both subscribers (2 ₁ ) and (2 ₂ ). A call path is set in between, and a desired hotline call can be started.

As described above, the hotline subscriber (2 ₁ )
Means that when the called subscriber (2 ₂ ) is in a call with another subscriber (2 ₃ ) at the time of calling, the called subscriber (2 ₂ ) can perform “call return registration”.
When is selected, the call return registration process is executed, and after the called subscriber (2 ₂ ) ends the call, a hot line call is automatically set, and a desired hot line can be started.

Next, the called subscriber (2 ₂ ) selects the called party access code (ACD _D ) = “3” in order to “forward” the hot line call to another subscriber (2 ₄ ). Suppose you did. The connection type registration unit (122) receives the called side access code (ACD _D ) sent from the called subscriber (2 ₂ ).
Analyzed [Step S71] and identifies that it is a "3", a hotline call confirmed shall be "call forwarding" [Step S72 _C], and controls the network (11), Subscriber (2 ₂₎ , (2 ₃ ) and the signal tone generator (1
6) and thereby release the connection between the three-way path trunks (18), after temporarily interrupted communication path Chakukanyu's and (2 ₂₎ and the subscriber (2 _3), Chakukanyu's (2 ₂₎ and the signal Sound generator (1
6) to transmit a dial tone (DT) generated by the signal tone generator (16) to the called subscriber (2 ₂ ), and from the called subscriber (2 ₂ ) to the transfer destination subscriber number (DN). _{When T} ) is transmitted, the transfer destination subscriber number (DN _T ) is set to be receivable [step S73 _C ].

[0097] The called subscriber who has heard the dial tone (DT)
(2_Two) Is the forwarding subscriber number (DN)_T), Transfer as
Previous subscriber (2_Four) Telephone number (DN_Four),
Destination subscriber number (DN_T) Connection type that was in the reception status
The formula registration unit (122) stores the subscriber (2 _Two)
Destination subscriber number (DN_T) [= Phone number (DN_Four)]
[Step S74_C], The received telephone number (D
N_T) [= (DN_Four)] To the central control unit (12)
And the subscriber (2_Two) And (2)_FourKnown call forwarding between
Request processing [Step S75_C].

The central control unit (12) selects and captures the transfer destination subscriber (2 ₄ ) based on the well-known incoming call transfer processing procedure, and the transfer destination subscriber (2 ₄ ) responds to the corresponding subscriber circuit (2 ₄ ). 1
5 ₄₎ sends a call signal (RG) via a Chakukanyu's (2 ₂₎ To control the network (11) connects the signal sound generating unit (16), the signal sound generating unit (16) Is transmitted to the called subscriber (2 ₂ ), and if the subscriber (2 ₄ ) responds, the network (11) is controlled to join the called subscriber (2 ₂ ) and the transfer destination. A call path is set between the caller (2 ₄ ).

After the called subscriber (2 ₂ ) requests the transfer destination subscriber (2 ₄ ) to accept the hotline call, the callee (2 ₂ ) returns to the original call with the called party subscriber (2 ₃ ). (For example, hooking), the central controller (12) controls the network (11) based on the well-known call transfer processing procedure, and the hotline subscriber (2).
Set up a communication path between ₁ ) and the transfer destination subscriber (2 ₄ ),
The hotline subscriber (2 ₁ ) can start a desired hot line call with respect to the destination subscriber (2 ₄ ), and can communicate between the called subscriber (2 ₂ ) and the other party (2 ₃ ). In the meantime, the call path once released is restored, and the call once interrupted can be resumed.

If the central control unit (12) selects the transfer destination subscriber (2 _T ) [= (2 ₄ )], the subscriber (2 ₄ ) is also busy (step S76 _C ). start reconnect format registration unit (122), the step S73 _C
By executing the subsequent steps, the destination subscriber (2 ₂ ) can select another transfer destination subscriber number (DN _T ).

As described above, the hotline subscriber (2 ₁ )
Is Chakukanyu user during a call (2 ₂₎ may also busy with other subscribers (2 _3), destination subscriber Chakukanyu's (2 ₂₎ (2 _T) [= (2 ₄ )] Can be selected and the incoming subscriber (2
_A hotline call can be started with the desired subscriber (2 ₄ ) in 2).

As is apparent from the above description, according to the embodiment of the present invention (the claims (claims 1, 6, 7, and 8), the hotline subscriber (2 ₁ ) receives the incoming subscriber when calling. Even when (2 ₂ ) is talking with another subscriber (2 ₃ ), three predetermined types of called-side busy-time connection types (BCT)
Execute one of the called party busy mode (BCT) selected by the called subscriber (2 ₂ ) from [this time “interruption allowed”, “call return registration” and “call forwarding”] possible and will, between the Chakukanyu's (2 ₂₎ and [If "interrupt acceptable" and the "call Kaemachi registration"], or the destination subscriber (2 _T) [= subscriber (2 _4)] During this time, a hotline call can be started.

Next, an embodiment of the present invention (claims 9 and 10) will be described with reference to FIG. 2, FIG. 3, FIG. 5, FIG.
This will be described with reference to FIG. In the embodiment of the present invention (claims 9 and 10), only the hot line function unit (121) and the connection type selection unit (123) in the central control unit (12) are used, and the auxiliary storage device (14) is used. ), Each subscriber data (S) stored corresponding to each accommodated subscriber (2).
DB) in the only storage area of the subscriber number wearing a hotline subscriber information (HLS) (DN _D) are utilized.

In this state, the service order for registering the subscriber (2 ₁ ) as a hotline subscriber is entered from a maintenance terminal or the like (not shown) in the same manner as the conventional exchange (1), in the same manner as the conventional exchange (1). Hotline service], registration target subscriber number [= subscriber (2 ₁ ) telephone number (DN ₁ )] and called subscriber number (DN _D ) [= subscriber (2 ₂ ) telephone number (DN ₂ ) ] Is input.

The central control unit (12) activates the hot line function unit (121), receives and analyzes the input service order, and stores the received service order in the auxiliary storage unit (14), similarly to the conventional exchange (1). To the subscriber (2 ₁ ) [telephone number (DN
₁ )], the subscriber data (SDB
₁₎ extracting sets hotline subscriber information (HLS) in a logic "1", also stores the telephone number of the destination subscriber number (DN _D) as destination subscriber ₍₂ 2) (DN 2) .

As described above, the central control unit (12) in the exchange (1) maintains the call acceptance state [step S in FIG.
31]. In this state, when the hot line subscriber (2 ₁ ) makes a call, the central controller (12) detects the call of the subscriber (2 ₁ ) via the subscriber circuit (15 ₁ ) [Step S32]. , corresponding to the auxiliary storage device calling subscriber from (14) (2 ₁₎ and extracted subscriber data (SDB _1), analyzed [step S33].

In the course of the analysis, the central controller (12)
It is analyzed whether or not the hotline subscriber information (HLS) in the subscriber data (SDB ₁ ) has been set to logic “1” (step S34). When it is determined that the logic has been set to logic “1”, calling subscriber (2 ₁₎ verify that the hotline subscriber, Chakukanyu's number to the subscriber data by entering hotline function section (121) (SDB ₁₎ (DN _D)
To extract the stored telephone number (DN ₂ ) (step S35).

Subsequently, the central control unit (12) analyzes the idle / busy state with the subscriber (2 ₂ ) corresponding to the telephone number (DN ₂ ) as a destination subscriber (steps S36 and S37). Assuming that the called subscriber (2 ₂ ) is currently talking with another subscriber (2 ₃ ), the central controller (12) identifies the called subscriber (2 ₂ ) as busy.

Subsequently, the central control unit (12) analyzes whether or not the called party busy type (BCT) has already been registered in the subscriber data (SDB ₁ ) (steps S36 and S38). When it is confirmed that the connection format during side talk (BCT) has not been registered, the connection format selection unit (123) is activated [step S3A].

The activated connection format selection unit (123)
The network (11) is controlled to connect the hot line subscriber (2 ₁ ) to the signal tone generator (16), and the busy tone (BT) generated by the signal tone generator (16) is added to the hot line. causes back to person (2 _1), when the originating hooking signal from the hot line subscriber (2 ₁₎ (HKG _S) is sent, sets the calling side hooking signal (HKG _S) to the reception enabled state [Step S3B].

The hot line subscriber (2 ₁ ) that has heard the busy tone (BT) recognizes that the called subscriber (2 ₂ ) is busy and operates the hooking operation to avoid incomplete connection of the hot line. When executed, originating hooking signal (HKG _S) is sent to the exchange (1).

In the exchange (1), the central control unit
The connection type selection unit (123) in (12)
Subscribers (2₁) Originating hooking signal
(HKG _S) [Step S3B], the net
By controlling the work (11), the hotline subscriber (2)₁)
The voice response unit (17) is connected to the voice response unit (17).
Guidance message (caller access code)
Introduction) (G_ACDS) To hotline subscribers (2₁Send to
And hotline subscribers (2₁)
Seth Code (ACD_S) Is sent,
Seth Code (ACD _S) To accept
[Step S3C].

The guidance message (introduction of the calling side access code) (G _ACDS ) is a connection mode (BCT) when the called side is busy.
As an example, when unconditional interruption is selected for the called subscriber (2 ₂ ) during a call, “4” is transmitted as the selected number, and the call waits until the called subscriber (2 ₂ ) has finished talking. If you choose the Kaemachi registration, in the case sends a "5" as the selection numbers, also to select the destination changes to try to call to the destination subscriber (2 ₂₎ other than the subscriber (2), selection When the number "6" is transmitted as a number, and when the called subscriber (2 ₂ ) selects the receiving side control to select any of the above three types of connection types (BCT), "7" is selected as the selected number. This is a message that specifies that

Hotline subscriber (2) who listened to the guidance message (introducing the _calling party access code) (G _ACDS )
₁ ) sends out the desired calling side access code (ACD _S ), and in the exchange (1), the connection type selection unit (1)
23) receives the calling-side access code (ACD _S ) sent from the hotline subscriber (2 ₁ ) [Step S]
3D], and executes a process corresponding to the received calling side access code (ACD _S ) [step S3E].

First, in step S3D, the hot-line subscriber (2 ₁ ) selects “unconditional interrupt” as the receiving-side busy-time connection type (BCT), so that the calling-side access code (ACD _S ) = It is assumed that “4” is selected.

The connection type selection unit (123) analyzes the received calling side access code (ACD _S ) (FIG. 5, step S51), and determines the calling side access code (ACD _S ) = “4”.
When it is confirmed that “unconditional interrupt” is selected as the connection format (BCT) of the receiving side busy time [Step S52 _A ], FIG. 4 [Steps S43 _{A to} S49]
In a similar process as in _A], the subscriber ₍₂₃₎ and the destination subscriber in the call (2 _2), a predetermined time (T _0), Caller tone signal sound generating unit (16) is generated (IIT ) Is superimposed on the voice of the other party (2 ₃ ) and transmitted [Step S
53 _A through S58 _A], during which the hotline subscriber (2 _1), and returns ringing tone signal sound generating unit (16) generates a (RBT).

The ring tone (IIT) and the ring tone (RB)
After a predetermined time (T ₀ ) elapses after the start of transmission of T), the connection type selection unit (123) transmits the ring tone (IIT) to the called subscriber (2 ₂ ) and the hotline subscriber (2).
_After the transmission of the ring tone (RBT) to ₁ ) is stopped, the central control unit (12) is notified from the subscriber (2 ₁ ) of the call between the subscribers (2 ₂ ) and (2 ₃ ). Requests interrupt call processing.

The central control unit (12) executes the interrupt call processing based on the same procedure as described above, and executes the network call (11).
To connect the hotline subscriber (2 ₁ ) to the three-way trunk (18), and make a call between the destination subscriber (2 ₂ ) and the subscriber (2 ₃ ), and the hot line subscriber (2 ₁ ). Is interrupted [step S59 _A ].

Thereafter, the hot line subscriber (2 ₁ ) can make an interrupt call to the called subscriber (2 ₂ ), and starts a desired hot line call. Meanwhile, Chakukanyu's ₍₂ 2)
The other party's subscriber (2 ₃ ) can also listen to the incoming call from the hot line subscriber (2 ₁ ) together with the incoming subscriber (2 ₂ ), or the hot line subscriber (2 ₁ )
While the call and the called subscriber (2 ₂ ) are performing the interrupt call, the other party (2 ₃ ) is put on hold, for example, to listen to the hold tone generated by the signal tone generator (16). Is also possible.

Next, in step S3D, the hot-line subscriber (2 ₁ ) selects “call-back registration” as the called-side busy-time connection type (BCT), so that the calling-side access code (ACD _S ) is selected. = Assume that "5" is selected.

The connection format selection unit (123) analyzes the received calling side access code (ACD _S ) (FIG. 5, step S51), and determines the calling side access code (ACD _S ) = “5”.
When it is confirmed that “call return registration” has been selected as the called-side busy time connection type (BCT) [Step S52 _B ], FIG. 4 [Steps S 43 _B and S 4]
In 4 _B] in the definitive when a similar process, the hot line subscriber (2 _1), [step S53 sends out the voice message voice response unit (17) generates (call Kaemachi registration completion notification) (G _{CPO) B} ], requesting the central control unit (12) to perform the same call return processing as described above [Step S5]
_4B ].

Voice message (call back registration completion notification)
Hotline subscribers (2 ₁ ) who heard (G _CPO )
As before, the handset is lowered to release the hotline call, and the terminating subscriber (2 ₂ ) automatically sets up the hotline call after the end of the call and waits for it to be called.

The central control unit (12) executes the call waiting process in the same procedure as described above, and the hotline subscriber (2 ₁ )
Telephone number (DN ₁ ) and called subscriber number (DN _D ) [=
(DN ₂ )], and the called subscriber (2 ₂ )
Is monitored, and when the end is detected, the hot line subscriber (2 ₁ ) and the called subscriber (2 ₂ ) are sequentially called, and when the called subscriber (2 ₂ ) answers, the hot line subscriber (2 ₂ ) is called. _A call path is set between ₁ ) and the called subscriber (2 ₂ ),
A desired hotline call can be started.

Next, in step S3D, the hot-line subscriber (2 ₁ ) selects “call destination change” as the called-side busy-time connection type (BCT), so that the calling-side access code (ACD _S ) = It is assumed that “6” is selected.

The connection format selection unit (123) analyzes the received calling side access code (ACD _S ) (FIG. 5, step S51), and determines the calling side access code (ACD _S ) = “6”.
When it is confirmed that “change destination” has been selected as the called-side busy connection type (BCT) [Step S52 _C ], FIG. 4 [Steps S 43 _{C to} S 46]
_C ], in the same manner as in hotline subscribers (2
₁ ), the voice response unit (17) sends a guidance message (destination change) ( _GDCH ) generated, and the hotline subscriber (2 ₁ ) sends a change destination subscriber number (DN).
_{When C} ) is transmitted, the reception state is set [Step S53 _C ].

Guidance message (change of destination) (G
_DCH) Listening to the hotline subscriber (2₁)
Similarly, the subscriber number (DN)_C) As a subscriber
(2_Four) Telephone number (DN_Four) To select the connection type
The selecting unit (123) selects the hotline subscriber (2₁From)
The transmitted destination subscriber number (DN_C) [= (D
N_Four)] [Step S54]_C], Received phone
Number (DN_C) [= (DN_Four)] To the central control unit (1
2), and the destination of the hotline call is
(2 _Two) To subscriber (2_Four)
[Step S55_C].

The central control unit (12) changes the destination subscriber (2 _D ) [= (2 ₂ )] to the destination subscriber (2 _C ) [= (2 ₄ )] in the same procedure as described above. The destination change processing is executed, and when the change destination subscriber (2 ₄ ) responds, a call path is set between the hotline subscriber (2 ₁ ) and the change destination subscriber (2 ₄ ), and a desired communication path is set. A hotline call can be started.

If the central control unit (12) selects the new subscriber (2 _C ) [= (2 ₄ )], if the subscriber (2 ₄ ) is also busy [step S56 _C ], The connection type selection unit (123) is started again, and step S53 _C
After that, the hotline subscriber (2
_{In 1} ), another subscriber number (DN _C ) to be changed can be selected.

Next, in step S3D, the hot-line subscriber (2 ₁ ) selects “call-side control” as the call-side busy-time connection type (BCT), so that the calling-side access code (ACD _S ) = It is assumed that “7” is selected.

The connection format selection unit (123) receives the received call
Side access code (ACD_S) [Fig. 5, Step
S51], the calling side access code (ACD_S) = “7”
And the called party busy time connection type (BCT)
After confirming that “Destination control” is selected,
Top S52_DFIG. 4 [Step S43]_DOr S4
6 _D] In the same process as in_Two)
Guidance message generated by the voice response unit (17)
(Interrupt warning) (G_IRT) To the other party (2_Three)of
At the same time as transmitting the voice over the voice [Step S53_D],
Incoming subscribers (2_Two) To the destination access code (ACD_D)
Reception is possible when [= “1” to “3”] is sent
(Step S54)_D] And hot rye
Subscribers (2₁), A ring tone (RBT) is transmitted.

Guidance message (interrupt warning) (G
_IRT) was listening to wear subscriber (2 ₂₎ is, in the same manner as described above,
When one of the designated called side access codes (ACD _D ) is selected, the connection type selection unit (123) sends the called side access code (AC) sent from the called subscriber (2 ₂ ).
D _D ) is received and analyzed [step S55 _D ], and a process corresponding to the received called side access code (ACD _D ) is executed in the process shown in FIG. 7 [step S5].
_6D ].

First, the receiving subscriber (2 ₂ ) receives the subscriber (2 ₄ ).
It is assumed that the receiving-side access code (ACD _D ) = “1” is selected in order to allow the interruption of the hot line call in the communication with the user. The connection type selection unit (123) receives and receives the called-side access code (ACD _D ) sent from the called subscriber (2 ₂ ).
Analyzed [7, step S71] and identifies that it is a "1", check shall be "acceptable interrupt" hotline call [Step S72 _A] in the same manner as described above, the subscriber (2 ₃ ) The called subscriber (2 ₂ ) who is talking on the phone is given a predetermined time (T
_0), the other party subscriber an incoming call display tone (IIT) (2 ₃₎
After sending by noisy speech, and sends the Chakukanyu's Caller tone for (2 ₂₎ (IIT), stops the transmission of the ringing tone (RBT) for hot-line subscriber (2 _1), the central The control unit (12) is requested to process an interrupt call from the subscriber (2 ₁ ) for a call between the subscribers (2 ₂ ) and (2 ₃ ).

The central control unit (12) executes an interrupt call process based on the same procedure as described above, and
To connect the hotline subscriber (2 ₁ ) to the three-way trunk (18), and make a call between the destination subscriber (2 ₂ ) and the subscriber (2 ₃ ), and the hot line subscriber (2 ₁ ). Interrupt.

Thereafter, the hot line subscriber (2 ₁ ) can make an interrupt call to the called subscriber (2 ₂ ) and can start a desired hot line call. In the meantime, the called subscriber (2 ₃ ) of the called subscriber (2 ₂ )
It is also possible to listen to the interrupted call from the hotline subscriber (2 ₁ ) together with the incoming subscriber (2 ₂ ), or the hot line subscriber (2 ₁ ) and the incoming subscriber (2 ₂ ) During execution of the incoming call, the other party (2 ₃ ) is put on hold, and for example, it is possible to listen to the hold sound generated by the signal tone generator (16).

Next, the incoming subscriber (2_Two) But hotline call
Is called “call return registration”, the access code (A
CD_D) = "2" is selected. Connection type selection section
(123) is the incoming subscriber (2_Two)
Access Code (ACD_D) Is received and analyzed [Step S
71], if it is identified as "2",
It is confirmed that the call is to be "call-back registered" (step S72).
_B], Controlling the network (11), and
(2_Two) And subscribers (2_Three) And restore the call path
In addition, hotline subscribers (2₁) And voice response unit (17)
And a voice message generated by the voice response unit (17).
Page (call back registration completion notification) (G_CPOA) hotline
Subscriber (2₁) And then to the central controller (12)
On the other hand, a call return registration process similar to that described above is requested.
Step S73_B].

Voice message (call return registration completion notification)
Hotline subscribers (2 ₁ ) who heard (G _CPO )
The handset is released to release the hotline call, and the called subscriber (2 ₂ ) automatically sets up the hotline call after the end of the call and waits for it to be called.

[0137] The central control unit (12), and phone number of the hot line subscriber _{(2 1) (DN 1)} , registers the telephone number of Chakukanyu's ₍₂ 2) (DN 2) as Kokae Machiko At the same time, the termination of the called subscriber (2 ₂ ) is monitored, and when the termination of the called subscriber (2 ₂ ) is detected, the hot-line subscriber (2 ₁₎ is set according to a known call-back call setting procedure. ) And the called subscriber (2 ₂ ) are sequentially called, and when both subscribers (2 ₁ ) and (2 ₂ ) answer, the network (11) is controlled to control both subscribers (2 ₁ ) and (2 ₂ ). A call path is set in between, and a desired hotline call can be started.

Next, the called subscriber (2 ₂ ) selects the called party access code (ACD _D ) = “3” in order to “call transfer” the hot line call to another subscriber (2 ₄ ). And
The connection type selection unit (123) receives and analyzes the called-side access code (ACD _D ) transmitted from the called subscriber (2 ₂ ) [Step S71], and when it identifies that it is “3”, determines the hotline. the call confirmed shall be "call forwarding" [step S72 _C], in the same manner as described above, after the temporarily suspended communication path Chakukanyu's and (2 ₂₎ and the subscriber (2 _3), Chakukanyu's ( 2 ₂ ), a dial tone (DT) generated by the signal tone generator (16) is transmitted, and when a destination subscriber number (DN _T ) is transmitted from the called subscriber (2 ₂ ), the transfer is performed. The destination subscriber number (DN _T ) is set in a receivable state [step S73 _C ].

The destination subscriber (2 ₂ ) that has heard the dial tone (DT) receives the transfer destination subscriber number (D ₂ ) in the same manner as described above.
When N _T ) [= telephone number (DN ₄ )] is selected, the connection type selection unit (123) transmits the destination subscriber number (DN _T ) [= telephone number (DN) sent from the subscriber (2 ₂ ). ₄ )]
[Step S74 _C ], and the received telephone number (D
N _T ) [= (DN ₄ )] to the central controller (12), and the destination subscriber (2 _D ) [= (2 ₂ )] and the destination subscriber (2 _T ) [= (2 ₄ ) ] (Step S75 _C ).

The central control unit (12) executes the call transfer processing in the same procedure as described above, and when the transfer destination subscriber (2 ₄ ) responds, the called subscriber (2 ₂ ) and the transfer destination subscriber ( 2 ₄₎ set the communication path between, Chakukanyu's (2 ₂₎ is, after the request acceptance hotline call to the transfer destination subscriber (2 _4), the original calling party subscriber ( When you perform a predetermined operation to return to the 2 ₃₎ and calls, hotline subscriber (2 ₁₎
A call path is set up between the transfer destination subscriber (2 ₄ ) and the hot line subscriber (2 ₁ ) so that a desired hot line call can be started with the transfer destination subscriber (2 ₄ ). The once released communication path is restored between the called subscriber (2 ₂ ) and the other party's subscriber (2 ₃ ), and the temporarily interrupted call can be resumed.

When the central control unit (12) selects the transfer destination subscriber (2 _T ) [= (2 ₄ )], if the subscriber (2 ₄ ) is also busy [step S76 _C ], The connection type selection unit (123) is started again, and step S73 _C
By executing the subsequent steps, the destination subscriber (2 ₂ ) can select another transfer destination subscriber number (DN _T ).

As is clear from the above description, the present invention (contract
According to the embodiment of the claim (claims 9 and 10), the hot line
In subscribers (2₁) Indicates the incoming subscriber (2_Two) Is other
Subscribers (2_Three), You can call
Four types of called-side busy-time connection types (BCT)
Call Interruption, Call Waiting Registration, Change Destination, and
Side control ”).
If “Receiver control” is selected,
(2_Two), Three pre-defined types of called-side busy type
Expression (BCT) [This time, “Interrupt allowed”, “Call return registration”
And "Call Forwarding"]
Noh, the subscriber (2_Two) And [“Unconditional Discount
``, '' `` Interrupt Allowed '' and `` Call Waiting Registration ''
Renewal subscriber (2 _C) Or forwarding subscriber (2_T) [=
Entrant (2_Four)] And establish a hotline call
Can be determined.

Next, embodiments of the present invention (claims 11 and 12) will be described with reference to FIGS. 2, 3, 16 and 20. In an embodiment of the present invention (claims 11 and 12), the hot line function unit (1) in the central control unit (12) is provided.
21) and the incoming call destination change unit (124) only, and each subscriber data (SD) stored in the auxiliary storage device (14) corresponding to each accommodated subscriber (2).
B) in the only storage area of the subscriber number wearing a hotline subscriber information (HLS) (DN _D) are utilized.

In this state, a registration service is performed by a service order for registering the subscriber (2 ₁ ) as a hot-line subscriber with the subscriber (2 ₂ ) as a destination subscriber from a maintenance terminal or the like (not shown). type [= hotline services], telephone number registered subscriber number [= telephone number of the subscriber (2 ₁₎ (DN _1)] and Chakukanyu party number (DN _D) [= subscriber (2 ₂₎ ( DN ₂ )] is input.

The central control unit (12) activates the hot line function unit (121) as in the case of the conventional exchange (1), and from the input service order, the subscriber number (DN ₁ ) to be registered and the destination subscription. When the subscriber number (DN ₂ ) is extracted, the subscriber data (SDB ₁ ) provided corresponding to the registered subscriber number (= telephone number (DN ₁ )) in the auxiliary storage device (14) is extracted. Then, the hot line subscriber information (HLS) is set to logic "1", and the telephone number (DN ₂ ) is stored as the called subscriber number (DN _D ).

As described above, the central control unit (12) in the exchange (1) maintains the call receiving state [step S in FIG.
31]. In this state, hot line subscriber when (2 ₁₎ makes a call, the central control unit (12) is a subscriber (2 ₁₎
Is detected via the subscriber circuit (15 ₁ ) [step S32], and the calling subscriber (2) is stored in the auxiliary storage device (14).
_The subscriber data (SDB ₁ ) corresponding to ₁ ) is extracted and analyzed [step S33].

In the course of the analysis, the central controller (12)
It is analyzed whether or not the hotline subscriber information (HLS) in the subscriber data (SDB ₁ ) has been set to logic “1” (step S34). When it is determined that the logic has been set to logic “1”, calling subscriber (2 ₁₎ verify that the hotline subscriber, Chakukanyu's number to the subscriber data by entering hotline function section (121) (SDB ₁₎ (DN _D)
To extract the stored telephone number (DN ₂ ) (step S35).

Subsequently, the central control unit (12) analyzes the idle / busy state with the subscriber (2 ₂ ) corresponding to the telephone number (DN ₂ ) as the receiving subscriber (steps S36 and S37), and analyzes the receiving subscriber ( 2 ₂₎ is sent out ,, Chakukanyu who identify that it is in the idle state (call signal (RG) for 2 _2), via the corresponding subscriber circuit (15 _2), also hotline The subscriber (2 ₁ ) is connected to the signal tone generator (16) by controlling the network (11), and is connected to the signal tone generator (1).
A ringing tone (RBT) for generating 6) is transmitted [step S3F].

Further, the central control unit (12) activates the incoming call destination changing unit (124) to enable execution of the incoming call destination changing process. The activated ringing destination change unit (1)
24), ring tones sent from the signal sound generating unit (16) (RBT) Hotline subscriber being received from (2 _1), when the originating hooking signal (HKG _S) is sent, the calling setting the side hooking signal (HKG _S) to the reception possible state [FIG. 6, step S61].

In this state, if the incoming subscriber (2 ₂ ) is absent and does not respond in the middle, the hotline subscriber (2 ₁ ) is replaced by a subscriber (2 ₂ ) other than the incoming subscriber (2 ₂ ). If, for example, an operation [for example, hooking] for changing the destination of a call is performed on [for example, the subscriber (2 ₄ )],
Hotline subscriber (2 ₁₎ from the exchange (1), originating hooking signal (HKG _S) is delivered.

[0151] In exchange (1), the central control unit (12) during the call in the destination changing unit (124), a hot line subscriber (2 ₁₎ originating hooking signal sent from (HKG _S) Upon receipt [Step S62], the hotline subscriber (2 ₁ ) receives the new subscriber number (D
N _C ) is sent, the new subscriber number (D
N _C) was set to accept a state capable [step S6
3] After controlling the subscriber circuit (15 ₂ ) and stopping the calling signal (RG) being transmitted to the called subscriber (2 ₂ ),
The signal tone generator (16) is controlled, and a ring tone (RBT) being transmitted to the hotline subscriber (2 ₁ ) is transmitted as a dial tone (DT).
Change to

The hotline subscriber (2 ₁ ) that has heard the dial tone (DT) receives the dial tone (DT ₁ ) as the destination subscriber number (DN _C ).
When the telephone number (DN ₄ ) of the destination subscriber (2 ₄ ) is selected, the incoming call destination change part (124), which is set to be able to receive the destination subscriber number (DN _C ), issues a hot line. The destination subscriber number (DN _C ) [= (DN ₄ )] transmitted from the subscriber (2 ₁ ) is received [Step S6].
4] The received telephone number (DN _C ) [= (DN ₄ )] is transmitted to the central control unit (12), and the destination of the set hot line call is determined from the called subscriber (2 ₂ ) to the subscriber. requesting to change to (2 ₄₎ [step S65].

The central control unit (12), based on the above-mentioned destination change processing procedure, changes the destination subscriber (2 _C ) [=
(2 _4)] selects and captures, transmits a call signal through the subscriber circuit (15 ₄₎ corresponding to the change destination subscriber (2 _4), the network is the hotline subscriber (2 ₁₎ (1
1) is connected to the signal tone generator (16) to send out a ring tone (RBT) generated by the signal tone generator (16);
If the new subscriber (2 ₄ ) responds, the network (1
1) is controlled to set a communication path between the hot line subscriber (2 ₁ ) and the new subscriber (2 ₄ ), and the hot line subscriber (2 ₁ ) sets the new subscriber (2 ₄ ) , A desired hotline call can be started.

[0154] Note that the central control unit (12) changes the destination subscriber (2 _C) [= (2 _4)] also ringing a call incoming call destination change portion (124) originating hooking signal (HKG _S) When the hotline subscriber (2 ₁ ) sends outgoing-side hooking signal (HKG _S ) when the subscriber (2 ₄ ) is not available and does not respond midway, the call is ringing. receiving a destination change unit (124) again originating hooking signal (HKG _S), by repeatedly executing step S63 and later, yet another change destination subscriber number to the hot line subscriber (2 ₁₎ (DN _C ) can be selected.

As is clear from the above description, the present invention (contract
According to the embodiments of claims 11 and 12), the hot line
Entrant (2₁) Is the incoming subscriber (2_Two) Is absent
Hotline subscribers who do not respond due to
(2₁) To the new subscriber (2 _C) [= (2_Four)〕choose
Possible, and the incoming subscriber (2_TwoDesired subscriber other than)
(2 _Four) And hotline call can be set up
Becomes

FIGS. 2 to 20 are merely examples of the present invention. For example, the switching network (100) to which the present invention is applied is not limited to the illustrated exchange (1). , A plurality of exchanges (1), and the hotline subscriber (2 ₁ ) and the destination subscriber (2 ₂ ) are accommodated in separate exchanges (1). However, the effect of the present invention does not change in any case.
In addition, the receiving side busy time connection type (BCT) to which the present invention is applied
Are not limited to the four types shown in the figures, and many other modifications are considered, but the effect of the present invention does not change in any case.

[0157]

As described above, according to the present invention, when a hotline subscriber requests a hotline call and makes a call in the switching network, and the called subscriber is busy or unanswered and cannot perform the hotline call. Without releasing the hotline call, based on the pre-registered connection type, immediately unconditionally interrupt the called subscriber who is talking, or automatically wait for a call return after the called party's call ends, Or, if you change the incoming call to another subscriber and leave the incoming call control to the receiving subscriber who is talking, or if you do not register the connection type beforehand and encounter a hotline By selecting the connection type to be executed from among the connection types described above, the registered or specified connection type can be executed without releasing the hotline call once, greatly increasing the convenience of the hotline service. Improvement Rutotomoni, also connection completion rate of exchange network to improve.

[Brief description of the drawings]

FIG. 1 is a principle diagram of the present invention.

FIG. 2 shows an exchange according to an embodiment of the present invention.

FIG. 3 is a hot line connection process in FIG. 2;

FIG. 4 is a processing diagram corresponding to a registered connection format in FIG. 3;

FIG. 5 is a process corresponding to the reception-side access code in FIG. 3;

FIG. 6 is a process of changing a called destination in FIG.

FIG. 7 is a reception-side access code corresponding process in FIGS. 4 and 5;

8 is a signal sequence at the time of unconditional interruption in FIG.

FIG. 9 is a signal sequence at the time of call waiting registration in FIG. 4;

FIG. 10 is a signal sequence when a destination is changed in FIG. 4;

FIG. 11 is a signal sequence when interrupts are permitted in FIGS. 4 and 7;

FIG. 12 is a signal sequence at the time of call waiting registration in FIGS. 4 and 7;

FIG. 13 is a signal sequence at the time of incoming call transfer in FIGS. 4 and 7;

14 is a signal sequence at the time of unconditional interruption in FIG.

FIG. 15 is a signal sequence at the time of call return registration in FIG.

16 is a signal sequence at the time of changing a destination in FIG. 5;

FIG. 17 is a signal sequence when interrupts are permitted in FIGS. 5 and 7;

FIG. 18 is a signal sequence at the time of call waiting registration in FIGS. 5 and 7;

FIG. 19 is a signal sequence at the time of incoming call transfer in FIGS. 5 and 7;

FIG. 20 is a signal sequence in FIG.

FIG. 21 shows a conventional exchange.

[Explanation of symbols]

1 exchange 2,200 subscribers 2 _1, 200 ₁ hotline subscriber 2 _2, 200 ₂ Chakukanyu's 11 network 12 the central control unit 13 main storage 14 an auxiliary storage device 15 generating portion 17 voice response subscriber circuit 16 tone Unit 18 Three-way trunk 100 Switching network 101 Hot line function 102 Connection type registration unit 103 Connection type selection unit 104 Call destination change unit 121 Hot line function unit 122 Connection type registration unit 123 Connection type selection unit 124 Call destination change Department

Claims (12)

[Claims] 1. When a hotline subscriber places a call,
In a switching network having a hot line function for connecting to a pre-registered called subscriber corresponding to the hot line subscriber without performing an operation of selecting a called subscriber number, the hot line subscriber may A connection type to be applied when a call cannot be set is registered in advance corresponding to the hot line subscriber, and the hot line call becomes unsettable when the hot line subscriber makes a call. A connection type registration means for connecting the calling hot line subscriber according to a connection type registered corresponding to the hot line subscriber. 2. The hotline according to claim 1, wherein the connection type registration unit registers an unconditional interruption to the called subscriber who is talking with another subscriber as the connection type. Incomplete avoidance method. 3. The connection type registration means, wherein after the called subscriber who is talking with another subscriber has finished talking, the call is temporarily released and the hotline subscriber who is on standby waits for a call. 2. The hot line incomplete avoidance method according to claim 1, wherein the call waiting registration for setting the hot line call is registered as the connection type. 4. The connection type registration means receives a telephone number of another subscriber selected by the hotline subscriber who was encountered while the called subscriber was busy, and attempts an incoming connection to the other subscriber. 2. The hotline incompletion avoiding method according to claim 1, wherein the change of the destination is registered as the connection type. 5. The connection type registration means registers the destination change as a connection type, and when the destination subscriber after the change is busy, another subscriber selected by the hotline subscriber. 5. The hotline incompletion avoidance method according to claim 4, wherein the change of the destination for trying to connect to the caller can be repeatedly executed. 6. The connection type registering means for connecting the hot line subscriber to the called subscriber who has received the call notification of the hot line call from a plurality of predetermined connection types. 2. The hotline incompletion avoidance method according to claim 1, wherein a destination control designated as a format is registered as the connection format. 7. The connection type registration means, when registering the called side control as a connection type, accepts an interruption to the called subscriber as a plurality of predetermined connection types, 7. A hotline incomplete avoidance system according to claim 6, wherein any of a plurality of call return registrations after call termination and call transfer for selecting another subscriber as a transfer destination subscriber are determined in advance. . 8. The connection type registration means, wherein the destination control is registered as the connection type, the destination subscriber specifies the call transfer, and the selected destination subscriber is busy. 8. The hotline incomplete avoidance method according to claim 7, wherein said call transfer for attempting call transfer to another subscriber selected by said called subscriber can be repeatedly executed. 9. When a hotline subscriber places a call,
In a switching network having a hot line function for connecting to a pre-registered called subscriber corresponding to the hot line subscriber without performing an operation of selecting a called subscriber number, the hot line subscriber may When a call setup failure is encountered, the hotline subscriber is requested to select a desired connection type from a plurality of predetermined connection types, and according to the connection type selected by the hotline subscriber, A hot line incomplete avoidance system, comprising a connection type selecting means for connecting the calling hot line subscriber. 10. The unconditional interrupt according to claim 2 and the call return registration according to claim 3, wherein the connection type selection means includes a plurality of connection types to be presented to the hotline subscriber. 10. The hotline incompletion avoidance method according to claim 9, wherein an arbitrary plural number is determined in advance from the destination change described in claim 4 and the destination control described in claim 6. 11. A hot line function for connecting to a pre-registered called subscriber corresponding to the hot line subscriber without selecting a called subscriber number when a call is made by the hot line subscriber. In the switching network comprising: when it is detected that the hot-line subscriber performs a predetermined start-up operation while calling and calling the called subscriber, the calling of the called subscriber is stopped. 6. A call destination change means for changing a call destination to another subscriber specified by a telephone number transmitted from the hot line subscriber following the activation operation. Hotline incomplete avoidance method. 12. The calling destination changing means during a call, while calling the changed destination subscriber specified by the hotline subscriber, and further receiving a call to another subscriber specified by the hotline subscriber. 12. The hotline incompletion avoidance method according to claim 11, wherein the change of the destination to which connection is attempted can be repeatedly executed.