JP3284787B2 - Additional service control method for telephone subscribers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a supplementary service control method when a telephone subscriber selects a supplementary service according to a new incoming call during a call.

[0002]

2. Description of the Related Art FIG. 8 shows a configuration example of a conventional ISDN exchange. In the figure, 800 is a switch network, 801
Indicates SW control units for circuit switching. The switch network 800 includes a plurality of digital subscriber circuits 803.
And a plurality of analog subscriber circuits 802,
Terminals connected by analog subscriber lines or digital subscriber lines can be accommodated in these subscriber circuits 802 and 803, respectively. Switch network 800
Is further configured to be connected to a circuit switching network 806 via TRKs 804 and 805.
07, it is connected to the packet exchange network 808. A packet switching SW control unit 809 for controlling the PHM, a scanning monitoring unit 810 for the TRK,
The above-described circuit switching SW control unit 801, scan monitoring unit 811 for analog subscriber circuit 802, and D channel control unit 812 for digital subscriber circuit 803 are configured to be managed and controlled by a central processing unit 813. I have.
The central processing unit 813 is configured to be connected to a common line signal network 815 via a common line signal processing unit 814, and is also connected to an information translator 816.

A subscriber terminal accommodated in a digital subscriber line circuit 803 has two communication channels (B channels) and one
It is connected to an ISDN exchange through a digital subscriber line composed of two control channels (D channels), and transmits and receives control signals related to the B channel through a dedicated D channel. This control message is connected to a common channel signaling network 815 for exchanging signals between exchanges via a D channel control unit 812, a central processing unit 813 and a common channel signal processing unit 814 of the ISDN exchange. On the other hand, a communication signal on the B channel is subjected to switching control by a switch network 800 controlled by a circuit switching SW control unit 801, and is connected to a circuit switching network 806.

FIG. 9 shows an example of the configuration of a conventional digital subscriber telephone terminal. In the figure, a layer 1 / layer 2 processing section 900 connected to a digital subscriber line performs processing such as exchange of digital signals and error correction, and a layer 3 processing section 901 performs call control according to a control message. The central processing unit 902 is connected to a display 904 and an operation input unit 905 via an I / O 903, and furthermore, a memory 906 and an external memory 907 represented by an IC card.
And the like, and controls the input / output units, and also has a function of matching with other types of terminals through a call control (T / A) unit 908. On the other hand, audio signals input / output by the handset 909 are input / output by the codec 911 via the call control unit 910, and the codec 9
11 performs encoding and decoding.

When the subscriber and the exchange are connected by a digital subscriber line as described above, control messages used in a procedure for setting up a call and a procedure for activating an additional service are prepared separately from the communication channel. It is possible to exchange even during communication using the control channel. Also,
The control messages are all digitized signals represented by bit strings, and the types and capacities of the signals can be easily added.

[0006] By utilizing these features, various additional services can be provided in the ISDN network.
At T, I. 251-I. It is recommended as the 257 series.

As a basic of these additional services, a caller ID notifying function for notifying a caller of a caller telephone number is provided. This caller ID feature,
In the call setup procedure, this is realized by putting the caller telephone number on a call setup request (SETUP) message sent from the exchange to the terminal. This caller number can be used to activate other additional services. For example, it is used to start an automatic transfer service. This is because the called user sets the subscriber number and the forwarding address corresponding to the subscriber number in the memory part of the terminal in advance, and the set subscriber number matches the caller telephone number of the incoming call provided from the network. In this case, the request can be realized by the terminal making a request to the network for the transfer to the set transfer destination.

[0008] When the called user is communicating, it is possible to use the above-mentioned caller ID notification function to obtain new caller information before making a request for activation of an additional service. It is possible to guess the contents of the incoming call without temporarily disconnecting the call during communication. Currently, additional services available to users communicating on an ISDN network (INS network) provided by NTT include a response rejection, a call transfer, and a call waiting function. Furthermore, it is also possible to activate the three-party call and the transfer during communication function after transition to the call waiting state once. The activation of these additional services is performed when a general incoming call from the network to the destination terminal or an incoming call is notified by the procedure of the incoming call during communication function, and the additional service is requested from the terminal.

Regarding the procedure for activating each additional service, refer to the technical reference materials “Interface of INS Net Service, 4th Volume (Layer 3 Circuit Switching Additional Service)”,
NTT issuance ". The selection and request of the supplementary service is basically performed by the user who requests the service, and it is assumed that the function is performed by the network. Therefore, the user terminal transfers a message carrying information necessary for activating the supplementary service to the network, and the network executes the requested supplementary service according to a predetermined procedure.

On the other hand, in a subscriber terminal accommodated in the analog subscriber line circuit 802 and in a digital telephone network using an analog subscriber line signaling as a subscriber line signaling, the digital subscriber line signaling is used. It is not possible to exchange digitized signals between such terminals and networks. Therefore, a function of notifying a terminal of a caller ID is not provided even though signals can be transmitted and received between the exchanges by the common channel signaling method. Scan monitoring unit 8 shown in FIG.
11 periodically monitors changes in the state of the subscriber line, such as the closing and opening of a loop, and detects dialed digits,
The information is reported to the central processing unit 813. Then, the central processing unit 813 performs exchange control based on the information.

FIG. 10 shows an example of the configuration of a conventional analog subscriber telephone terminal. This terminal is an answering machine having a voice response, a recording function, and a remote control function thereof.
The functions of normal calling, receiving and talking, and the function of transmitting the PB signal are realized by using the telephone circuit 1000, the handset 1001, and the dial switch 1002. An answering machine function is a voice synthesizer 100 for responding when the user is away.
3. Microcassette deck 1004 for recording voice of incoming call, incoming call detection unit 1005, and central processing unit 1
006 or the like. The terminal further has a PB signal receiver 1007, and various functions of the terminal can be remotely controlled by the PB signal. FIG.
0, further, 1008 is a function button for selecting various functions, 1009 is a speaker connected to the telephone circuit 1000 via the changeover switch 1010 and the speaker amplifier 1011, and 1012 is connected to the micro-cassette deck 1004. Microphone.

When the analog subscriber terminal is communicating,
The receiving user can know the incoming call by a call signal sent from the network. The only signals that the terminal can send to the exchange are on-hook signals and analog signals (PB signals) having a specific frequency in the audible sound range. For this reason, a request for a call waiting function or a call transfer function to the network is made by an on-hook signal.

[0013]

A problem associated with the selection of the supplementary service to be activated is the handling of calls for which prior information cannot be obtained. That is, if the caller has not subscribed to the caller ID notification function, or has used the caller ID notification disable function even if he / she has contracted, or because the caller is not accommodated in the ISDN network, This is the handling of the call when the caller number is not notified because the notification function cannot be used. In this case, it is difficult for the user and the terminal during communication to guess the contents of the call, and to know the contents, use the call waiting function to temporarily connect the call. It is necessary.

In the case where the exchange and the terminal independently select the supplementary service on behalf of the user who is talking, the exchange and the terminal compare with the caller information received by the exchange and the terminal.
It is necessary to set in advance in the exchange or the terminal a list of caller information and an additional service to be activated for a call having the information (an incoming call verification table). However, setting the incoming verification table for each call is very complicated, and the flexibility in changing the setting is low.

On the other hand, a call terminal accommodated by an analog subscriber line cannot obtain caller information in advance, and the selection and request of additional services automatically performed by the terminal based on the advance information are currently not available. Infeasible.

Accordingly, it is an object of the present invention to provide a telephone subscriber additional service control method capable of selecting an appropriate additional service for incoming calls during communication.

It is another object of the present invention to provide a telephone subscriber additional service control method which can enhance the convenience of a user who can efficiently select an additional service for an incoming call during communication.

[0018]

According to the present invention, for a call arriving during communication, caller information provided through a network and caller information preset in a destination exchange are provided. Is verified in this exchange, and if it is determined that there is no need to notify the called terminal accommodated in the exchange of the incoming call, the exchange activates the first response function, and the above-described verification If it is determined that it is necessary to notify the called terminal accommodated in the exchange of the incoming call, the caller ID and display identifier are notified from the exchange to the called terminal, and the caller number and display identifier and the called If the caller ID and display identifier set in the terminal are verified at the called terminal, and the latter verification determines that it is not necessary to notify the called user of the called terminal of the incoming call,
If the called terminal or the exchange activates the second answering function and determines by the verification of the latter that it is necessary to notify the called user of the incoming call, the caller ID, the display identifier, and the third
A list of the answering functions displayed on the display unit of the called terminal, and the additional service control method for the telephone subscriber, in which the called function selected by the called user among the displayed third answering functions is activated by the called terminal or the exchange. Is provided.

When the subscriber and the exchange are connected by a digital subscriber line, the above-mentioned notification of the caller number and the display identifier performed from the exchange to the called terminal is performed by a caller number notification function.

In a network using the common channel signaling system, a digitized signal from the originating exchange to the destination exchange can be transmitted through a signal line different from the communication line. In a network, it is possible to know information such as a terminal class (general, public, mobile), a subscriber's joining area, and the like, in addition to a caller number. Since the network has a function to roughly regulate incoming calls to communicating terminals based on this information, it is possible to reduce the processing of the terminals and reduce the trouble of setting and updating the additional service selection list. be able to.

If it is determined by the verification that there is a need to notify the called terminal accommodated in the exchange of the incoming call, it is determined whether or not there is an available communication channel available at the called terminal, and there is an available communication channel. Only in this case, it is preferable to transmit and record the voice signal to the receiving terminal through this communication channel.

As described above, the network keeps track of the vacant state of the communication channel of each user, and the communicating user can
Even when one of the two communication channels provided by the basic interface of the DN is used, it is possible to make an incoming call by using an unused unused channel (general incoming call). At present, the procedure when the same terminal uses two or more communication channels at the same time for another call is not defined, but the magnetic recording unit of the terminal uses the available communication channel in the general incoming call procedure. By connecting the communication line to the communication line, it is possible to record the content of the call received during the communication as voice. Thus, the user who is communicating can obtain the incoming call during the communication, in particular, prior information by listening to the message recorded in the magnetic recording unit after the communication is completed without temporarily disconnecting the call during the communication. It becomes possible to know the contents of calls that cannot be made.

The notification of the caller number and the display identifier performed by the exchange to the called terminal converts the caller number and the display identifier into a PB signal, transmits the PB signal together with the voice during the call, and then transmits the PB signal. It is also preferable to perform this by restoring the caller ID and display identifier from the PB signal.

Further, in this case, the activation of the second or third answering function in the exchange converts the selection number of the answering function into a PB signal at the receiving terminal, and converts the PB signal together with the voice during the call to the exchange. It is also preferable that the switching is performed by restoring the selection number from the PB signal in the exchange.

As described above, for a user accommodated by an analog subscriber line for which the caller ID notification function is not provided, the network is provided with a function of converting the caller ID into a PB signal and transmitting it. By providing a function of restoring the generated PB signal to the caller number in the call terminal, the caller number can be known. In this case, since the PB signal is sent together with the voice signal during the call, it is necessary to keep the notification of the caller ID as low as possible. As described above, it is possible to restrict the incoming call to be notified to the call terminal by providing the network side with a function of roughly controlling the incoming call to the communicating terminal.

[0026]

FIG. 1 shows an embodiment of the method of the present invention.
FIG. 2 is a block diagram illustrating a configuration of an SDN exchange. In the figure, reference numeral 100 denotes a switch circuit network, and 101 denotes an SW control unit for circuit switching. Switch network 10
Numeral 0 contains a plurality of digital subscriber circuits 102 and a plurality of analog subscriber circuits 103, and the subscriber circuits 102 and 103 accommodate terminals connected by analog subscriber lines or digital subscriber lines, respectively. It is possible to do. The switch network 100 further includes T
It is configured to be connected to the circuit switching network 106 via RKs 104 and 105, and is configured to be connected to the packet switching network 108 via the PHM 107. The packet switching SW control unit 109 for controlling the PHM, the scanning monitoring unit 110 for TRK, the above-described line switching SW control unit 101, the scanning monitoring unit 111 for the analog subscriber circuit 103, and the analog subscriber circuit 103 PB signal conversion / restoration unit 1 for connected PB signal transceiver 117
18 and the D channel control unit 112 for the digital subscriber circuit 103 are configured to be managed and controlled by the central processing unit 113. The central processing unit 113 is configured to be connected to a common line signal network 115 via a common line signal processing unit 114, and is also connected to an information translator 116 and a database 119.

As described above, the central processing unit 113 has the database 119 having the incoming call verification table information describing the control corresponding to the caller information set for each subscriber. Each of the analog subscriber circuits 103 has a PB signal transceiver 117. Each PB signal transceiver 117 converts the calling number information from the central processing unit 113 into a PB signal, or transmits a PB signal from a terminal. PB signal conversion restoration section 118 having a function of restoring a transmitted signal
Is connected.

The subscriber terminal accommodated in the digital subscriber line circuit 103 has two communication channels (B channels) and one
It is connected to an ISDN exchange through a digital subscriber line composed of two control channels (D channels), and transmits and receives control signals related to the B channel through a dedicated D channel. This control message is connected to a common channel signaling network 115 for exchanging signals between exchanges via a D channel control unit 112, a central processing unit 113 and a common channel signal processing unit 114 of the ISDN exchange. On the other hand, the communication signal on the B channel is subjected to switching control by a switch network 100 controlled by a circuit switching SW control unit 101, and is connected to a circuit switching network 106.

FIG. 2 is a block diagram showing an example of the configuration of the digital subscriber terminal in the above embodiment. In the figure, layer 1
The layer 2 processing unit 200 performs processing such as exchange of digital signals and error correction, and the layer 3 processing unit 201 performs call control according to a control message. The central processing unit 202
A / O 203 is connected to a display 204 and an operation input unit 205, and further connected to a memory 206, an external memory 207 typified by an IC card, and the like. 215 and the communication control (T / A) unit 208, it also has a function of matching with other types of terminals. On the other hand, the voice signal input / output by the handset 209 is
0 is input / output to / from the codec 211 and is input / output to / from the magnetic recording unit 212. The audio signal is input / output to / from the codec 214 via the communication control unit 213, and the codecs 211 and 214 perform encoding and decoding. Is The central processing unit 202 is further connected to a memory 216 for an incoming call verification table.

The digital subscriber terminal switches the switching control section 215 to perform communication control (T
/ A) The connection to another terminal via the unit 208 or the connection to the magnetic recording unit 212 of the terminal itself to record an audio signal can be selectively performed. This recording function has a codec unit 214 and a call control unit 213 in a different system from that used when an incoming call is connected to the handset 209, so that the terminal performs communication using the handset. Even if a call is made, the voice of another call can be demodulated and recorded. In addition, the digital subscriber terminal has a memory 216 for storing an incoming call verification table,
The central processing unit 202 has a function of verifying the sender information of the incoming call and the table for verifying the incoming call, executing a control procedure for the verification result, and a function of the switching control unit 21.
5 and the control function of the call control unit 213 are added to the conventional one.

FIG. 3 is a flow chart of control relating to the subscriber terminal accommodated in the digital subscriber line circuit in the above-described embodiment. Referring to FIG. The operation will be described.

Upon receiving the call setup request message from the originating exchange (step S1), the destination ISDN exchange, when the destination user requested to connect the call is communicating.
Whether it is necessary to verify the caller information included in the call setting request message and the caller information set in the incoming call verification table in the database 119 and notify the called user of the incoming call. It is determined whether or not it is (step S2). If it is determined that there is no need to notify the incoming call,
The SDN exchange activates additional services such as call rejection, call transfer (also set with transfer destination number information) set according to the caller information in the call verification table, and immediate connection after communication is completed. Perform (Step S3).

On the other hand, if it is determined that an incoming call notification is necessary, the ISDN exchange determines whether there is an available communication channel between the called terminals (step S4).
A call setting request message including caller information such as a caller number and a display identifier is transmitted to the called terminal according to the general incoming call procedure or the procedure of the incoming call notification function (steps S5 to S).
7).

Upon receiving the call setting request message (step S8), the called terminal verifies the caller information in the message and the caller information set in the incoming call verification table in the memory 216 in advance. It is determined whether it is necessary to notify the user of an incoming call (Step S)
9).

If it is determined that there is no need to notify the called user of the incoming call, the called terminal determines whether the incoming call is due to the general incoming call procedure or the incoming call notification function during communication (step S10). A control procedure corresponding to the sender information and the incoming call method set in advance in the incoming call verification table is selected (step S11).

On the other hand, if it is determined that there is a need to notify the called user of the incoming call, the called terminal determines the method of receiving the incoming call (step S12), and determines the caller ID of the incoming call and the incoming call number. On the other hand, a function-added service such as call rejection, call transfer, call waiting, call recording during a call (only in the case of a general call reception procedure) that can be selected by the called user is displayed on the display unit of the terminal (step S13). The receiving user during communication inputs a number corresponding to the desired additional service from the input unit of the terminal based on the displayed caller number,
Notify the terminal of the additional service to be started (step S1)
4). The terminal returns a call message to the destination ISDN exchange by designating an appropriate communication channel in order to activate the notified supplementary service (Steps S15 to S1).
6), the ISDN exchange connects the line using the designated channel (step S17).

The transfer destination number required for using the call transfer function is input when the user selects an additional service from the input unit, or when the transfer destination number is stored in the memory unit of the called terminal in advance. It is possible to select from a list. Regarding call rejection, call transfer, and call waiting, CCITT I. 251-I. 25
The procedure according to the recommendation of the 7 series is followed, but when the user selects the call recording function during a call, the called terminal sends a call message that specifies a vacant communication channel as unchangeable.
In addition to the transmission to the DN exchange, the ISDN exchange connects the line with the destination terminal using the designated empty channel. The destination terminal switches the switching control unit 215,
The call is connected to the magnetic recording unit 212 to perform voice recording. Thus, the user who is communicating can obtain a call that arrives during communication, in particular, prior information by listening to the message recorded in the magnetic recording unit 212 after the communication is completed without temporarily disconnecting the call that is communicating. It is possible to know the contents of the call that cannot be made.

Next, a description will be given of a priority determination procedure using the incoming call verification table. As a table for this purpose, there is a procedure based on a sender priority determination table schematically shown in FIG. 4 and a procedure based on a processing method priority table schematically shown in FIG.

The exchange attempts to execute the processes described in the processing method priority table in order of priority in accordance with the priority obtained from the caller priority determination table, and has the highest priority among the processes that can be activated at present. Start things up.

According to the sender priority determination table shown in FIG. 4, (1) filtering by a special procedure,
(2) number digit filtering, (3) originating user type filtering, (4) network verification identification,
The order of determination of the priority based on the display identification is performed. The basic module of each of these items is provided by the network provider, and each priority is determined by the called user.

(1) In the filtering by a special procedure, a password is set in advance between a caller and a callee, and the caller sets this in a user / user information message or the like to perform call setting. In this way, the network determines the legitimacy and processing of the caller based on the number.

(2) The filtering by the number digit uses the caller number, the caller area, and the caller accommodating network. Currently, caller ID service is ISD
It is exchanged only between N subscribers, and as a caller area, internationally, it is used to identify the country of origin by the country code of the caller's number, and domestically, to identify the caller's area by the area code, city code Is performed. In the future, other networks such as relay networks, digital telephones, analog telephones, and mobiles will be specified.

(3) Filtering according to the originating user type is performed by determining whether the call is a public telephone call, a call via an operator, or a data call in a voice band.

(4) The determination of the priority based on the network verification identification and the display identification determines the final priority based on the sum of the priority determined by the network verification identification and the priority determined by the display identification. It is. In the determination of the priority by the network verification identification, the caller number entered by the calling user is verified using the network verification identifier code to assure the validity of the caller number, and the result is shown in FIG. Priorities are determined as shown. In determining priority based on display identification,
The priority is determined using the display identification code as shown in FIG.

The priorities for the processes follow the processing method priority table shown in FIG. Each item in this table is
It depends on the capabilities of the network and the contract status of the receiving user.
The priority of each item can be determined by the receiving user.

FIG. 6 is a block diagram showing an example of the configuration of the analog subscriber terminal in the above embodiment. This terminal is also an answering machine having a voice response, a recording function, and a remote control function thereof. The normal outgoing, incoming and outgoing call functions and the PB signal transmitting function are provided by the telephone circuit 60.
0, handset 601 and dial switch 602. The answering machine function includes a voice synthesizer 603 for answering when the user is absent, a micro-cassette deck 604 for recording the voice of an incoming call,
5 and the central processing unit 606. The terminal further includes a PB signal restoring unit 613 and a PB signal receiver 607 connected thereto, and can remotely control various functions of the terminal by the PB signal. 6, 608 is a function button for selecting various functions, 609 is a speaker connected to the telephone circuit 600 via the changeover switch 610 and the speaker amplifier 611, and 612 is connected to the micro-cassette deck 604. A microphone 614 is a memory of an incoming call verification table, and 615 is a display.

As described above, the analog subscriber terminal of the present embodiment has a memory 61 for storing the incoming call verification table.
The central processing unit 606 has a function of verifying the sender information of the incoming call and the incoming call verification table, and executing a control procedure based on the verification result. Further, it has a PB signal restoring unit 613 having a function of restoring calling number information from a PB signal sent from the exchange.

FIG. 7 is a flow chart of control relating to a subscriber terminal accommodated in an analog subscriber line circuit in the above-described embodiment. Referring to FIG. 7, an exchange and an analog subscriber terminal according to the present embodiment will be described below. Will be described.

The control at the terminating ISDN exchange for analog subscribers is similar to the functions provided to digital subscribers. That is, upon receiving the call setup request message from the originating exchange (step S21), the destination ISDN exchange
If the called user requested to connect the call is busy,
Whether it is necessary to verify the caller information included in the call setting request message and the caller information set in the incoming call verification table in the database 119 and notify the called user of the incoming call. It is determined whether or not it is (step S22). If it is determined that you do not need incoming notifications,
The ISDN exchange activates additional services such as call rejection, call forwarding (which is also set with transfer destination number information) set according to the caller information in the call verification table, and immediate connection after communication is completed. Perform (Step S23).

On the other hand, if it is determined that an incoming call notification is necessary, the ISDN exchange makes a ringing tone according to the procedure of the incoming call notification function during communication to notify the called terminal of the incoming call (step S24). Thus, the receiving terminal performs control preparation (step S25). The ISDN exchange converts the caller information such as the caller number and the display identifier into a PB signal (step S26), and sends it to the called terminal together with the voice signal during the call (step S27).

The receiving terminal that has received the PB signal (step S28) restores the caller information by the PB signal restoring unit 413 (step S29). Next, the restored caller information is verified with the caller information preset in the incoming call verification table, and it is determined whether it is necessary to notify the called user of the incoming call (step S30). .
When it is determined that there is no need to notify the called user of the incoming call, an additional service such as an incoming call rejection or an incoming call transfer function corresponding to the caller information set in advance in the incoming call verification table is selected (step S31).

On the other hand, if it is determined that there is a need to notify the called user of the incoming call, the caller ID of the incoming call and the incoming call rejection, call transfer, call waiting, which can be selected by the called user for this incoming call. Are displayed on the display unit of the called terminal (step S32). The called user during communication inputs a number corresponding to the desired additional service from the input unit of the terminal based on the displayed caller number, and notifies the terminal of the additional service to be activated (step S3).
3).

In the selection of the supplementary service by the destination terminal and the selection of the supplementary service by the destination user, the destination IS
When it is necessary to notify the DN switch of the number of the supplementary service selected and the transfer destination number required for using the call transfer function, the called terminal converts the information into a PB signal and outputs the voice during the call. The signal is sent to the destination ISDN exchange together with the signal (step S34). The destination ISDN exchange receives the transmitted PB signal (step S35), searches the user-designated control procedure table to restore the original information (step S36), and starts the additional service (step S36).
37).

The control for the subscriber terminal accommodated in the analog subscriber line circuit described above is not limited to the user accommodated in the ISDN network by the analog subscriber line, but also for the digital telephone network using the common channel signaling system. It is also possible for users to use it.

The above-described embodiments are all illustrative of the present invention and are not intended to limit the present invention, and the present invention can be embodied in various other modified forms and modified forms. Therefore, the scope of the present invention is defined only by the appended claims and their equivalents.

[0056]

As described in detail above, in the present invention,
For a call arriving during communication, caller information provided via the network and caller information preset in the destination exchange are verified in this exchange, and the verification accommodates the call in the exchange. If it is determined that there is no need to notify the called terminal of the incoming call, the exchange activates the first response function, and the above-described verification needs to notify the called terminal accommodated in the exchange of the incoming call. If it is determined that there is, the caller ID and display identifier are notified from the exchange to the called terminal, and the caller number and display identifier and the caller number and display identifier set in advance in the called terminal are received. If it is determined in the latter verification that there is no need to notify the called user of the called terminal of an incoming call, the called terminal or the exchange activates the second response function, and the latter verifies Side user If it is determined that it is necessary to notify the caller, the caller ID, the display identifier, and the list of the third response function are displayed on the display unit of the called terminal, and the called terminal among the displayed third reception functions is displayed. The answering function selected by the user is activated by the called terminal or the exchange.

As described above, since the exchange and the terminal independently perform the function of restricting incoming calls during communication and selecting additional services, the user during communication can avoid the useless call disconnection without temporarily cutting the incoming call. An appropriate additional service can be selected. In addition, since these functions are distributed among exchanges, terminals, and users, flexibility in setting and changing the incoming call verification table is improved, user convenience is improved, and line connection efficiency is improved. be able to.

Further, for the user accommodated by the digital subscriber line, a line connection that allows voice recording for a call arriving during communication using an available communication channel is realized, thereby terminating the communication. By listening to the message recorded after the call, the contents of the call for which prior information cannot be obtained can be known, and the convenience for the user can be further improved.

Further, for the user accommodated by the analog subscriber line, information necessary between the terminal and the exchange is transmitted to the P.
By making it possible to use the caller ID notification function in the same way as the user accommodated in the digital subscriber line by using the function of exchanging using the B signal, the efficiency of selecting an additional service for an incoming call during communication is improved. And user convenience can be achieved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of the configuration of an ISDN exchange according to an embodiment of the method of the present invention.

FIG. 2 is a block diagram illustrating an example of a configuration of a digital subscriber terminal according to the above-described embodiment.

FIG. 3 is a flowchart of control relating to a subscriber terminal accommodated in a digital subscriber line circuit in the embodiment described above.

FIG. 4 is a diagram showing an outline of a priority determination procedure based on a sender priority determination table.

FIG. 5 is a diagram showing an outline of a processing method priority table.

FIG. 6 is a block diagram illustrating an example of a configuration of an analog subscriber terminal according to the above-described embodiment.

FIG. 7 is a flowchart of control relating to a subscriber terminal accommodated in an analog subscriber line circuit in the embodiment described above.

FIG. 8 is a block diagram illustrating a configuration of an ISDN exchange according to the related art.

FIG. 9 is a block diagram illustrating an example of a configuration of a digital subscriber terminal according to the related art.

FIG. 10 is a block diagram illustrating an example of a configuration of an analog subscriber terminal according to the related art.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 Switch network 101 Circuit switching SW control unit 102 Digital subscriber circuit 103 Analog subscriber circuit 104, 105 TRK 106 Circuit switching network 107 PHM 108 Packet switching network 109 Packet switching SW control unit 110, 111 Scan monitoring unit 112 D Channel control units 113, 202, 406 Central processing unit 114 Common line signal processing unit 115 Common line signal network 116 Information translator 117 PB signal transceiver 118 PB signal conversion restoration unit 119 Database 200 Layer 1 / layer 2 processing unit 201 Layer 3 processing Unit 203 I / O 204 Display display 205 Operation input unit 206, 216, 414 Memory 207 External memory 208 Call control (T / A) unit 209, 401 Handset 210, 213 Call control unit 21 , 214 codec 215 switching control unit 600 telephone circuit 602 dial switch 603 voice synthesizer 604 microcassette deck 605 incoming call detection unit 607 PB signal receiver 608 function button 609 speaker 610 changeover switch 611 speaker amplifier 612 microphone 613 PB signal restoration unit 615 display display

Claims (5)

(57) [Claims] 1. For a call arriving during communication, caller information provided via a network and caller information preset in a destination exchange are verified in the exchange, and the verification verifies the caller information. If it is determined that there is no need to notify the called terminal accommodated in the exchange of the incoming call, the exchange activates a first response function, and the verification identifies the called terminal accommodated in the exchange. If it is determined that it is necessary to notify the incoming call, the caller ID and display identifier are notified from the exchange to the called terminal, and the caller ID and display identifier and the calling terminal are set in the called terminal in advance. The called terminal number and the display identifier are verified at the called terminal, and if it is determined that the verification does not require the notification of the incoming call to the called user of the called terminal, the called terminal or The exchange initiates a second answering function. If it is determined by the verification that it is necessary to notify the called user of the incoming call, the caller ID, the display identifier, and a list of third response functions are displayed on the display unit of the called terminal. And the receiving terminal or the exchange activates the receiving function selected by the receiving user among the displayed third receiving functions,
A supplementary service control method for telephone subscribers. 2. The method according to claim 1, wherein the notification of a caller ID and a display identifier performed by the exchange to the called terminal is performed by a caller ID notification function. 3. When it is determined by the verification that it is necessary to notify the called terminal accommodated in the exchange of the incoming call, it is determined whether or not there is an available communication channel that can be used by the called terminal. 3. The method according to claim 1, wherein the voice signal is transmitted to the called terminal through the communication channel and recorded only when there is a free communication channel. 4. The notification of a caller number and a display identifier performed by the exchange to the called terminal converts the caller number and the display identifier into a PB signal, and converts the PB signal together with a voice during a call. 2. The method according to claim 1, wherein after transmission, the method is performed by restoring a caller ID and a display identifier from the PB signal at a receiving side. 5. Activation of the second or third answering function in the exchange, the selection number of the answering function being converted into a PB signal at the destination terminal, and the PB signal being exchanged with the voice during a call. To the PB at the exchange.
4. The method according to claim 3, wherein the method is performed by restoring the selection number from a signal.