JPH04159845A - Call waiting informing method - Google Patents

Abstract

PURPOSE:To enable a subscriber to evade noisy ringing of a call-waiting tone and, at the same time, to prevent the subscriber from being failed to catch another important incoming call while the subscriber makes telephone conversation with one subscriber by designating in advance the execution/nonexecution of the display of call-waiting calls. CONSTITUTION:When a call-waiting signal is received after the execution/ nonexecution of the display of call-waiting signals are designated in advance, the information indicating the execution/nonexecution of the display of the call-waiting signal is retrieved. When the execution is designated, the call- waiting call is displayed on the telephone set 1 being used and, when the nonexecution is designated, the call-waiting call is not displayed on the telephone set 1 and a signal refusing the call-waiting call is sent to a speech line 2. Accordingly, the execution/nonexecution of the display of call-waiting calls can be selected. Therefore, a subscriber can evade noisy ringing of a call-waiting tone and can be prevented from failing to catch another important call.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention provides a call waiting notification method in a telephone and a PBX (digital private branch exchange) having a function of receiving a call waiting signal from a communication line during a call. It is related to.

(Prior Art) Conventionally, telephones having the function of receiving a call waiting signal have been used, for example, in the analog line call waiting service (NTT
(service name), the central office exchange puts a notification sound on the call line, so if you have subscribed to the call waiting service, if you receive a call from another person while you are on the phone, the call waiting notification sound will be played unconditionally. It was audible. On the other hand, with the call waiting notification service for digital lines that is currently becoming popular, when a call is received on a telephone that is currently talking, the central office exchange sends a control signal to the telephone, and the telephone receives the call regardless of the caller's number. This system notifies the operator of an incoming call by making a sound in response to a control signal.

Further, a waiting call notification means in a conventional PBX (digital private branch exchange) is constructed as shown in FIGS. 13 and 14. Extension terminal 33 of PBX 32 (I
PBX 32 from l5DN 31 to extension terminal 33 during a call between SDN terminal) and another extension terminal 34 (ISDN terminal).
When there is an incoming call, a 5ETUP (call setup) message is sent via the D channel of the 15DN office line 35. P
The BX 32 receives the 5ETUP message at the 15DN station line interface circuit (BRT) 36. BRT36
central processing unit (CC) 38 via control line 37 that it has received the 5ETUP message from I 5DN 31.
Notify. The CC 38 learns from the information request information included in the 5ETUP message that the extension terminal to receive the call is the extension terminal 33 that is currently on the call. CC38 is extension terminal 33
The call reference number (CR) is different from the call reference number (CRI) of the call in progress.
2) (Figure 14) send the 5ETUP message to extension terminal 3.
3 to the 15DN extension interface (BRI) 39 via the control line 37. BRI 39 sends CR2's 5ETUP message to extension terminal 33,
Notify you of an incoming call during a call. When the extension terminal 33 receives the 5ETUP message, it learns that another call has arrived during the call, and sends an ALERT message to the PBX 32 to notify that the call is being called. The PBX32 receives the ALERT message on the BRI39, and the BRI39 receives the ALERT message.
CC3 indicates that the message has been received via the control line 37.
8 will be notified. The CC38 that received the notification uses the control line 37
Send ALERT message to BRT36 via I5D
Issue an instruction to send to N31. BRT received the instructions
36 sends an ALERT message to I 5DN 31. Thereafter, when the CRY call ends, the extension terminal 33 performs a disconnection recovery procedure (DISC (disconnection), R
EL (release), REL COMP (release complete)
and releases the CRI call. That is, extension terminal 3
3, when the current call (call number CR1) ends.

Send a Disc (disconnect) message to the PBX to disconnect the call.
Send to 32. Call number CRI Di from extension terminal 33
The PBX 32 that received the sc message sends the extension terminal 33
A REL (release) message is sent to release the call, and a DISC message is sent to the extension terminal 34 of the other party, and TSWII is switched to send out a BT (busy tone). Extension terminal 4, which received the DISC message, sends REL to release
Send the message to PBX32. PBX32 is RE
When receiving the L message, it stops sending out BT (busy tone), transmits a REL CoMP (release complete) message to the extension terminal 34, and releases the call between the PBX 32 and the extension terminal 34. After releasing the CRI call, the extension terminal 33
When the terminal 2 responds to the incoming call, it sends a C0NN (response) message to the PBX 32. The PBX 32 receives the message via the BRI 39 and notifies the CC 38 of the message.

When the CC 38 instructs the BRI 39 to send a C0NN ACK (response acknowledgment) message to the extension terminal 3, the BRI 39 sends the C0NN ACK message to the extension terminal 33. Also, CC38 is I 5DN3
BR to send a C0NN (response) message to 1.
When instructed to T36, BRT36 sends the C0NN message to X5DN31.

(Problem to be solved by the invention) However, there are only 1 telephones that use the digital line.
When a call notification signal (control signal) is received, the operator is automatically notified of the reception by sound.
As with conventional analog lines, the ringing sounds during calls can be annoying. In view of the above-mentioned drawbacks, it has been considered to visually display incoming call notifications on a display, but during a call, the nerves are naturally concentrated on the ears, and it may not be possible to notice changes in the display. many.

In addition, when a call in progress is made by the operator, if you answer the incoming call and put the call to the other party on hold and make them wait, the other party will be Sometimes I feel very uncomfortable, thinking, ``Even though I sent a message, it was put on hold midway through the call.''

Furthermore, in the conventional example of the above-mentioned PBX, all incoming calls from the 15DN 31 to the extension terminal 33 were notified to the extension terminal 33, so the user of the extension terminal 33 was busy and did not accept incoming calls from anyone other than the specified party. Even when I didn't want to, it displayed an incoming call (audible and visible) during a call, which was very annoying. Further, the receiving party (caller) is kept in a ringing state one by one while the extension terminal 33 is talking, and is forced to wait without any contact until the extension terminal 330 ends the call.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a call waiting notification method that allows the operator to select whether or not to notify the operator of the call notification by sound, and to provide a method for notifying the operator of a call that is being called by a call from the operator. To provide a method for notifying an incoming call while a call is in progress, which can regulate incoming calls depending on whether the call is being received or not, and which does not keep the recipient of the call waiting.

(Means for Solving the Problems) In order to achieve the above object, a first aspect of the present invention provides a means for receiving an incoming call signal from a communication line during a call, and a means for displaying the incoming call while the call is in progress. In the call waiting notification method for a telephone set, it is specified in advance whether or not to display a busy call, and when a call waiting signal is received, whether or not to execute the specified call waiting display. Search for information.

If it is specified to display the incoming call, the incoming call will be displayed on the phone that is in use, and if it is specified not to display the incoming call, the incoming call will be displayed on the phone that is in the middle of the call. A signal is sent to the communication line to reject the incoming call during the call without displaying the message.

Further, a second aspect of the present invention provides a method for notifying an incoming call in a telephone set, which includes means for receiving an incoming call signal from a communication line during a call, and means for displaying the incoming call while a call is in progress. If the call is a call originating from the telephone, the incoming call is not displayed and a signal is sent to the communication line to refuse a response to the incoming call.Further, the present invention A third invention of the present invention is to provide a system having a digital line network interface, and when a call is received from a digital line network to a certain extension terminal and the extension terminal is busy, it is possible to detect that there is an incoming call. In a call waiting notification method for a digital private branch exchange equipped with a notification function, the calling number, which is the number of the party to be notified of an incoming call, is stored in advance for each extension terminal, and the incoming call notification mode is set for each extension terminal using a digital line network. The extension terminal that received the call from the ISDN is set to either the normal call notification mode, which notifies all incoming calls from ISDN, or the specific call notification mode, which notifies only incoming calls from the party with the stored calling number. If the set incoming call notification mode is normal incoming call notification mode, the extension terminal that received the call is notified of the incoming call regardless of the calling number, and the set incoming call notification mode is set to specific incoming call notification mode. In the notification mode, when the calling number of the incoming call is in the stored calling number, the extension terminal where the call was received is notified of the call waiting, and the calling number of the incoming call is in the stored calling number. When there is no call, a signal is sent to the digital line network to reject the call.

Furthermore, in the third aspect of the invention, the specific incoming call notification mode is such that when the calling number of the incoming call is not among the stored calling numbers, the specific incoming call notification mode is set to a mode in which the incoming call is responded to by voice.

Furthermore, in the fourth aspect of the present invention, when a call is already in progress at the time of an incoming call, reference is made to a storage means in which incoming call conditions are stored in advance.1-1 Incoming call conditions prestored in the storage means. Accordingly, the incoming call is rejected or the incoming call is notified while the call is in progress.

(Operation) In the first aspect of the present invention, it is specified in advance whether or not to display an incoming call while a call is in progress. When a call-in-call signal is received 1 If the call-in-call display is specified, the in-call message will be displayed on the phone that is currently talking, and if the in-call display is not specified, the call is in progress. The relevant l
! Phone II! J Busy call is not displayed and a signal to reject the busy call is automatically sent to the communication line. This eliminates the annoyance of the ringtone during a call.1. It also prevents you from missing other important calls while you are on the phone.

In addition, in the second aspect of the present invention, if the call in progress is a call made by 51 from the telephone, the call waiting message is not displayed, and the signal rejecting the call response is sent to the communication line. automatically sent to. This allows you to prevent important calls that you made from being interrupted by ringtones, etc., and also prevents the other party on the phone from being interrupted by an incoming call even though the call was made by you. Alternatively, by holding it on hold, it is possible to prevent severe discomfort.

Furthermore, in the third aspect of the present invention, the calling number, which is the number of the party to be notified of incoming calls, is stored in advance for each extension terminal, and the incoming call notification mode is set for each extension terminal to notify all incoming calls from the digital line network. The terminal is set to either a normal incoming call notification mode in which the caller receives a call, or a specific incoming call notification mode in which only incoming calls from the called party having the stored calling number are notified. When the extension terminal that received a call from ISDN is busy, if the set incoming notification mode is the normal incoming call notification mode, the incoming call will be notified to the extension terminal that received the call regardless of the calling number of the incoming call. ,
If the set incoming call notification mode is the specific incoming call notification mode, when the calling number of one incoming call is among the stored calling numbers, the extension terminal from which the incoming call was received is notified of the incoming call, and the incoming call (A's If the calling number is not among the stored calling numbers, a signal is automatically sent to the digital line network to reject calls (3).As a result, in the specific call notification mode, calls from parties other than the specified caller are automatically sent. When you do not want to accept incoming calls, you can restrict incoming calls while you are talking to other parties than a specific person.Also, by answering the incoming call with voice, you can avoid any contact. This can prevent the other party from having to wait.

Furthermore, in the fourth aspect of the present invention, when a call is received and a call is already in progress, a storage means in which a call receiving condition during a call is stored in advance is referred to, and a ringtone during a call is stored in advance in the storage means. Depending on the situation, the incoming call will be rejected or the incoming call will be notified while the call is waiting. This allows for flexible response to incoming calls during communication.

(Example) First, an embodiment of the first aspect of the present invention will be described in detail.

FIG. 1 is a schematic block diagram of a telephone to which an embodiment of the first invention is applied. In the same figure, ■ is a telephone, 2 is l5
A communication line connected to the DN, 3 is a driver/receiver, and 64 is a channel demultiplexing circuit, which separates the signal from the communication line into the so-called B channel (communication channel) and D channel (control channel). However, conversely, the B channel and D channel from the telephone set 1 to the communication line 2 are multiplexed. 5 is a B channel signal line, 6 is a D channel signal line, and 7 is a C0DEC (abbreviation for cadet-decoder), which converts the audio digital signal on the B channel (communication channel) into an analog signal, and connects the handset 8 It converts the audio analog signal from the computer into a digital signal. , 9 is a CPtJ, 10 is a memory into which writing/reading is performed by the CPU 9, 11 is a sound source provided in the C0DEC7, 12 is a speaker, 13 is a key input section, 14 is a display section such as a liquid crystal, I=ED, etc. .

Usually, the communication line 2 has two B channels (communication channels) in the case of ISDN. However, the telephone of this embodiment connected to this is configured to use only a single B channel, as shown in FIG. telephone 1
It is assumed that the user is talking to a partner (not shown) via the communication line 2.

When a third party different from the other party calls telephone 1, I
Since the central office exchange (not shown) of the SDN has an empty B channel, it sends a message calling telephone 1 via the D channel.6CPU 9 receives this message through driver/receiver 3, channel demultiplexing circuit 4, and D channel signal #6. Then, since the only B channel is being used for a call, the sound source 11 is activated and the speaker 12 emits a ringtone during the call. The operator of the filling machine 1 hears the in-call ringtone from the speaker while talking on the handset 8. The feature of this embodiment is that the user specifies in advance whether or not the ring tone is to be sounded during a call using the key input section 13. Ci) U 9 detects an input from the key manual section 13 and stores it in the memory 10.

FIG. 2 is a flowchart showing the procedure for implementing this embodiment. When a message calling the telephone 1-\ is received from the communication line 2, the CPU 9 receives it via the driver/receiver 3, the channel multiplexing/demultiplexing circuit 4, and the D channel signal line 6 (step Sl).

If a call is not currently in progress (step 32), the normal ringtone signal from the sound source 11 is sent to the speaker 12 to make the ringtone sound (step S3), and if a response such as off-hook is detected (step S4), the communication line 2 through the D channel signal line 6, the channel multiplexing/demultiplexing circuit 4, and the driver/receiver 3 (step 35). Thereafter, a conversation is carried out between the other party (not shown) and the user of the telephone set 1 via the communication line 2, the driver/receiver 3, the channel multiplexing/demultiplexing circuit 4, the CODEC 7, and the handset 8.

On the other hand, if the call is currently in progress in step S2, the contents of the memory 10 are read out (step 56), and it is determined whether the previously specified input designates ringtone ringing during a call or does not permit it (step 56). 37). If the setting is to permit or disable the ringtone during a call, a message is sent to the communication line 2 to refuse the response to the incoming call in step St (step S8).

On the other hand, if the in-call ring tone is specified in step S7, a signal of the in-call ring tone, which is different from the normal ring tone in the sound source 11, is sent to the speaker 12 to make the in-call ring tone sound (step S9). When a predetermined key force for answering the incoming call is detected (step 310), a message is sent to disconnect the currently active call on communication line 2 (step 511), and a response message for the incoming call is sent to the communication line 2 (step 511). (Step S12).

FIG. 3 shows a telephone 20 to which another embodiment of the first invention is applied.
This is a schematic block diagram of the telephone, in which B channels B1 and B2 for telephone calls (communications) are used for telephone calls and data communications, respectively.

In this figure, the same components as in FIG. 1 are given the same reference numerals, and their explanations will be omitted. , 15 is a speed matching circuit, and the processing speed in the external data terminal device 17, and B
It converts the signal speed of two channels (generally 64 KbPs) to match them. 16 is R3232C
18 is a B1 channel signal line assigned for communication, and 19 is a B2 channel signal line assigned for data communication.

FIG. 4 is a flowchart showing the procedure for implementing this embodiment. That is, when there is a calling message from the communication line 2 to the telephone 20, the CP
U9 is driver/receiver 3, channel multiplexing/demultiplexing circuit 4
, receives the paging message via the D channel signal line 6 (step 513). Next, it is determined whether the paging message requests a telephone call or data communication (LLC: Low Layer Compatibility) (step 514). Proceed to the same routine as after step S2 (step 32
~512). On the other hand, if data communication is requested in step 314, if the data terminal bag [17 is in communication (step 515), an incoming call rejection message is sent to communication line 2 (step S8); (Step 515), sends a response message to the communication line 2 (Step 516) and starts the data terminal device 17 (Step 517).
Receiver 3, channel demultiplexer circuit 4, speed conversion circuit 1
5, R3232C, B via driver receiver 16
2 channel 19 performs data communication.

Next, the second invention of the present invention will be explained in detail.

This embodiment is applied to a telephone having the same configuration as that shown in FIG. 1, which describes the embodiment of the first invention, and the present embodiment will be described below with reference to FIG. 1.

The feature of this embodiment is that when a call in progress is a call originating from the operator of the telephone, the in-call ringtone is sounded.1. There is no CPU9
When a call is generated by the telephone, it is stored in the memory 10. FIG. 5 is a flowchart showing the procedure for implementing this embodiment. When there is a calling message from the communication line 2 to the telephone set 1, the CPU 9 receives it via the driver/receiver 3, the channel multiplexing/demultiplexing circuit 4, and the D channel signal line 6 (step 521).

If a call is not currently in progress (step 522), the normal ringtone signal from the sound source 11 is sent to the speaker 12 to make the ringtone sound (step 523), and if a response such as off-hook is detected (step 524), the communication line 2 through the D channel signal line 6, the channel multiplexing/demultiplexing circuit 4, and the driver/receiver 3 (step 52).
5).

Meanwhile, a communication line 2, a driver/receiver 3 . Channel demultiplexing circuit 4. If a call is currently in progress via the C0DEC 7 and the handset 8 (step 522), the memory 10 is retrieved (step $26), and it is determined whether the current call is originated from the telephone set 1. (Step 527). If the call is not an outgoing call, a normal ringing tone signal from the sound source 11 causes the speaker 12 to emit a ringing tone during a call (step 328), and at this time, if necessary, the display unit 14 simultaneously displays that there is an incoming call. When the key force unit 13 detects a predetermined key force for responding to the incoming call (step 529), a disconnection signal for the incoming call is sent to the communication line 2 (step 530) and the incoming call is terminated. A response signal is sent to the communication line 2 (step 531). On the other hand, if it is determined in step S27 that the call in progress is a call that was generated by the telephone 1, a call rejection signal is sent to the communication line 2 (step 332), and a ring tone is emitted during the call. Ringing and, if necessary, displaying an incoming call on the display unit 14 are prohibited.

FIG. 6 shows a telephone 25 to which another embodiment of the second invention is applied.
This is a schematic block diagram of the telephone, and this telephone has two communication channels, a B1 channel 21 and a B2 channel 22. In this figure, parts having the same functions as those in FIG. 1 are given the same reference numerals and their explanations will be omitted.

In FIG. 6, 23 is a switch for switching and connecting the B1 channel 21 and the codec 7 or sound source 11, and 24 is a B2
This is a switch that selectively connects the channel 22 and the codec 7 or the sound source 11, all of which can be switched under the control of the CPU 9.

FIG. 7 is a flowchart showing the procedure for implementing this embodiment. Steps that are the same as those in FIG. 5 are given the same step numbers and their explanations will be omitted. In FIG. 7, if a call is in progress in step 322, the B1 channel 21
When answering an incoming call using a predetermined key manually, instead of disconnecting the call,
A hold tone is sent from the sound source 11 on the B1 channel to the other party during the call and the call is made to wait for a while (step 333), and a conversation is started with a new party using the B2 channel 22 (step 534).

Then, when the conversation with the new incoming call party ends, the operator of the telephone set 25 performs a predetermined key operation from the key manual section 13.

When the CPU 9 detects that a predetermined key operation has been performed while responding to an incoming call, it sends a disconnection signal to the call on the B2 channel, stops sending the hold tone to the Bl channel, and resumes the call on the B1 channel. resume.

Also, in the embodiments shown in FIGS. 1 to 4, the current call may be put on hold without being disconnected, and a conversation may be started with a new incoming call party.

Further, although the above five embodiments have been described using a digital telephone as an example, the present invention can also be applied to a button telephone device capable of accommodating a digital line. In this case, the main device may perform the above control.

Next, embodiments of the third invention of the present invention are shown in FIGS. 8 to 12.
This will be explained with reference to the figures. Figure 8 shows the P to which this embodiment is applied.
14 is a schematic block diagram of the BX, in which the same or equivalent parts as in FIG. 13 are given the same reference numerals. In FIG. 8, 31 is l5DN, 32 is PBX, 33.
34 is an extension terminal (ISDN terminal), 35 is a JtlSDN office line, and 36 is an l5DN office line interface circuit (BRT).
, 37 is a control line, 38 is a central processing unit, 39.40 is an I
SDN extension interface (BRI), 41 is a time division switch, 42 is a calling number table that stores the calling number for notification of incoming calls for each extension number, a mode table that stores the incoming notification mode for each extension terminal, an exchange program, etc. Mi
main memory (MM), 43 is a maintenance console (MC) for registering the calling number for notification of incoming calls, registering the called number mode as a command, and registering data necessary for the PBX 32 as commands, 44 is a voice response device I (V
M).

In Figure 8, the incoming call notification mode for each extension terminal is MC.
43 is written into the mode table in MM42 by inputting the command. The mode table is the 10th
As shown in the figure. In FIG. 10, O in the incoming call notification mode represents a normal incoming notification, meaning that all incoming calls from the 15DN31 to the corresponding extension terminal during a call will be notified to that extension terminal, and 1 represents a specific incoming notification, For incoming calls from l5DN31 to the corresponding terminal a during a call, only incoming calls from a specific caller number will be notified, and all other calls will be rejected by l5DN31, or
Alternatively, the MM44 responds by voice. The party with the specific calling number of the specific call notification is the party with the calling number that can be indexed from the calling number table as shown in FIG. The calling number is registered in the calling number table by inputting a command from the MC 43.

When an incoming call is received from the l5DN 31 to the extension terminal 33 while the extension terminals 33 and 34 are talking, a 5ETUP message is sent via the D channel of the l5DN office line 35. The PBX 32 receives the 5 ETUP message via the BRT 36, and the BRT 36 notifies the CC 38 via the control line 37 that the 5 ETUP message has been received. The CC 38 learns from the data of the information element included in the 5ETUP message that the extension terminal to which the call is to be made is the extension terminal 33 that is currently on the call. The CC 38 reads the incoming notification mode of the extension terminal 33 from the king table (FIG. 10) in the MM 42, and in the case of normal incoming notification, the CC 38 reads the incoming call notification mode of the extension terminal 33 in the conventional example shown in FIG. 14. After the CRI call ends, the CR2 call begins.

When the incoming call notification mode is specific incoming call notification, CC38 is set to MM.
42, the registered data of the extension terminal 33 matches the calling number of the incoming call, and if there is a match, it is shown in FIG. In this sequence, the extension terminal 33 is notified of the incoming call, and after the call of CR1 is completed, the call of CR2 is started.

If there is no match, R
EL COMP (release complete) message T 5D
N31 and releases the call (CR2>).Also, as shown in FIG.
responds to the incoming call (CR2) by sending a C0NN (response) message. CC38 is T,
Control 5W41 and arrive at VM44! )F, (CR2
), and controls the VM 44 to broadcast a single voice message and perform a voice response. For example, the voice response message is ``You are currently on the phone.'' If you hear a beep, please tell us what you need.1. After hearing the voice response message and speaking the matter, the caller at the other party's terminal disconnects the call.

When the other party disconnects, the I5DN 31 sends a Disc (disconnect) message to the PBX 32.

The PBX 32 that received the DI'SC message sends a REL (release) message to l5DN to release the call.
6R, EL message sent to 31 is received, and 15
DN 31 sends a REL COMP (release complete) message to PBX 32 and releases the call.

PBX 32 releases the call (CR2) upon receiving the REL COMP message.

In the above embodiment, the calling number table and the mode table are provided in the MM42, but they may be stored in the BRI39.40 name or in the BRT36. Further, although the calling number and call notification mode are registered by the MC 43, they may also be registered by the extension terminals 33 and 34.

(Effect of the invention) According to the first invention of the present invention, as stated above in Theory 11 [7],
In a call waiting notification method for a telephone having means for receiving a call waiting signal from a communication line during a call and means for displaying the call waiting, it is determined in advance whether or not to display the call waiting. specified, and when a call waiting signal is received, the information on whether or not to execute the specified call waiting display is searched 1, and if it is specified to execute the call waiting display, the corresponding Display the call waiting on the telephone, and if it is specified not to display the call waiting, send a signal to the communication line to reject the call without displaying the call waiting on the telephone. By doing so, it is possible to avoid the annoyance of the ringing tone during a call, and it is also possible to prevent other important incoming calls from being missed during the call.

According to a second aspect of the present invention, there is provided a method for notifying a call-in-progress for a telephone, comprising means for receiving a call-in-progress signal from a communication line during a call, and means for displaying the incoming call. If the call in progress is a call originating from the telephone in question, the incoming call is not displayed and a signal is sent to the communication line to refuse to respond to the incoming call. It is possible to prevent important calls from being interrupted by ringtones, etc., and also to prevent the other party from being interrupted or put on hold due to an incoming call even though the call was made by the user. This has the effect of preventing unpleasant discomfort.

Furthermore, according to the third aspect of the present invention, the system has a digital line network interface, and when a certain extension terminal receives a call from the digital line network and the extension terminal is busy, the call is received. In a method for notifying a call in progress using a digital private branch exchange equipped with a function to notify the user of a call, the calling number, which is the number of the party to be notified of the incoming call, is stored in advance for each extension terminal,
Set the incoming call notification mode for each extension terminal to either the normal incoming notification mode, which notifies all incoming calls from the digital line network, or the specific incoming call notification mode, which notifies only incoming calls from the party with the stored calling number. IS I) When the extension terminal that received a call from N is busy, if the set call notification mode is normal call notification mode, the call will be made to the extension terminal that received the call regardless of the calling number. If an incoming call is notified and the M call notification mode set above in 1- is set to the specific incoming call notification mode, the calling number of the incoming call is set to the stored calling number +
At the end of January, the terminal that received the call is notified of the incoming call, and if the calling number of the incoming call is not among the stored calling numbers, a signal is sent to the digital line network to reject the call. This has the effect of restricting incoming calls during calls to parties other than a specific party, such as when you do not want to accept calls from anyone other than a specific party when in the specific incoming call notification mode. .

In addition, by responding with voice to the other party receiving a call during a call, it is possible to prevent the other party receiving the call from being kept waiting without any communication.

Furthermore, according to the fourth aspect of the present invention, if a call is already in progress when a call is received, the incoming call condition is stored in advance;
Referring to the storage means L, by rejecting the incoming call or notifying the incoming call in accordance with the incoming call condition stored in advance in the storage means, the communication purse has the effect of being able to respond flexibly to the call. .

[Brief explanation of drawings]

FIG. 1 is a schematic block diagram of a telephone to which an embodiment of the first invention is applied, FIG. 2 is a flowchart showing the implementation procedure of the embodiment of the present invention, and FIG. FIG. 4 is a schematic block diagram of a telephone to which this embodiment is applied; FIG.
FIG. 6 is a schematic block diagram of a telephone to which another embodiment of the second invention is applied, and FIG. 7 is a flowchart showing the implementation procedure of an embodiment of the second invention of the present invention. A flowchart showing the implementation procedure of the example, FIG. 8 is the third embodiment of the present invention.
I of the PBX to which the m-embodiment of the invention is applied! A schematic block diagram, FIG. 9 is a table diagram showing the calling number table in the PBX of FIG. 8, FIG. 10 is a table diagram showing the mode table in the PBX of FIG. Metsu 7 for detailed explanation of the third invention
Figure 13 shows the PB using the conventional method.
A schematic block diagram of X and FIG. 14 are message sequence diagrams for explaining the conventional method. DESCRIPTION OF SYMBOLS 1...Telephone, 2...Communication line, 3...Driver/receiver, 4...Channel multiplexing/demultiplexing circuit, 5...
B channel signal line, 6...D channel signal line, 7...
・C0DEC18...Handset, 9...CPU, 1
0...Memory, 11...Sound source, 12...Speaker, 13...Gee human power section, 14...Display section. Applicant Canon Inc. Agent Patent Attorney Toshihiko Watanabe Figure 10 Figure 11 Figure 14

Claims (1)

[Scope of Claims] 1. In a call-in-waiting notification method for a telephone having means for receiving an incoming call signal from a communication line during a call, and means for displaying the incoming call in progress, Specify in advance whether or not to execute the call-waiting display, and when a call-waiting signal is received, search for information on whether or not to execute the specified call-waiting display, and specify whether or not to display the call-waiting display. If it is specified, the call waiting message will be displayed on the phone that is currently talking, and if it is specified not to display the call waiting message, the call will not be displayed on the phone that is currently talking and the call will be rejected. A method for notifying an incoming call which is characterized by transmitting a signal to the communication line. 2. In a call waiting notification method for a telephone having means for receiving a call waiting signal from a communication line during a call and means for displaying the call in progress, the call in progress is transmitted from the telephone. A call waiting notification method is characterized in that, if the call has occurred, the call waiting is not displayed and a signal is sent to a communication line to refuse a response to the call waiting. 3. A digital private branch exchange that has a digital line network interface and has a function of notifying an incoming call if a certain extension terminal receives a call from the digital line network and the extension terminal is busy. In the incoming call notification method, the calling number, which is the number of the party to be notified of the incoming call, is stored in advance for each extension terminal, and the incoming call notification mode is set for each extension terminal.
Set to either the normal call notification mode, which notifies you of all incoming calls from the digital line network, or the specific call notification mode, which notifies you only of incoming calls from the party with the stored calling number.
When the extension terminal that received a call from SDN is busy, if the set incoming notification mode is the normal incoming call notification mode, the incoming call is notified to the extension terminal that received the call regardless of the calling number of the incoming call. , If the set incoming call notification mode is the specific incoming call notification mode, when the calling number of the incoming call is among the stored calling numbers, the extension terminal from which the incoming call was received is notified of the incoming call, and the incoming call is sent. An incoming call notification method, characterized in that when the number is not among the stored caller numbers, a signal to reject the incoming call is sent to a digital line network. 4. The specific incoming call notification mode is a mode in which a voice response is made to the incoming call when the calling number of the incoming call is not among the stored calling numbers. Notification method. 5. When a call is received, if the call is already in progress, refer to the storage means that stores the incoming call condition in advance, and reject the incoming call or reject the incoming call in accordance with the incoming call condition stored in advance in the storage device. A method for notifying an incoming call that is characterized by notifying the incoming call. 6. The call receiving notification method according to claim 5, wherein the call receiving condition is whether or not the communication that has already been carried out at the time of receiving the call is a call originating from the telephone. 7. The call waiting notification method according to claim 5, wherein the call receiving condition is information for identifying the called party.