JP2817855B2 - Private branch exchange - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

The present invention relates to a private branch exchange that connects a proxy response terminal to a predetermined partner when a predetermined operation is performed on a proxy response terminal other than the receiving terminal.

[Prior art]

As a pickup (proxy response) method in a private branch exchange accommodating a conventional ISDN and a plurality of terminals, a plurality of reception groups are formed by a plurality of terminals. To accept this incoming call, the following three methods were used. -Pick-up method 1. If the other terminal is in the same receiving group as the receiving terminal, dial the pickup special number or press the pickup key.・ Pick-up method 2. If the other terminal is in a different receiving group from the receiving terminal, dial (Pick-up special number + receiving terminal group number) or press the pickup key and dial the receiving terminal's group number. . -Pick-up method 3. If the extension number of the called terminal is known, dial the extension number instead of the called terminal group number in the above item 2. In recent years, efforts have been made to develop ISDN as a backbone communication network in Japan for the purpose of integrating various networks such as telephone networks and data communication networks and providing various services. This ISDN provides a calling number notification service for notifying a called terminal of a calling party's telephone number, and various services using the calling number for incoming call control of a private branch exchange have been proposed.

[Problems to be solved by the invention]

However, the above-mentioned conventional pickup system 2
Or in 3, when the terminal tries to respond,
The user of the terminal to be picked up must immediately determine and operate the structure and group number of the called group or the extension number of the called extension. Therefore, it is usually difficult to make the above determination immediately upon receiving a call, and in actual use, the pickup system 1 is practically used, and the receiving group is often relatively wide. Therefore, a pickup response is randomly made to the incoming call in the incoming call group. For this reason, if the requirement is other than that of the responder, or if the request is for another department, for example, search for a person in charge of the inquiry, transfer to another department, etc. He was forced to work outside of his normal duties, which was very annoying. Also, when there are a plurality of incoming calls in the same incoming call group, if the pick-up response of the pick-up method 1 is made, the answering party does not know at all which incoming call is to be answered, and the caller is required to meet the requirements. If you don't ask, you can't judge. Therefore, a response to a requirement having a high temporal priority may be delayed.

[Means for Solving the Problems]

SUMMARY An advantage of some aspects of the invention is to solve the above-described problems. The invention has, for example, the following configuration as one means for solving the above-described problems. That is, it is determined that the incoming call is an incoming call from a predetermined partner when a predetermined operation is performed on a sending unit that sends an incoming signal to the receiving terminal at the time of the incoming call and a proxy response terminal other than the receiving terminal. And connection means for connecting the proxy response terminal and the predetermined partner, and when the predetermined operation is performed on the proxy response terminal, if the incoming call is not determined to be an incoming call from the predetermined partner, And transmitting means for transmitting a predetermined signal to the proxy response terminal.

[Action]

In the above configuration, when a predetermined operation is performed on a proxy response terminal other than the receiving terminal, if the incoming call is determined to be a call from a predetermined partner, the proxy response terminal is connected to the predetermined partner. In addition, when the predetermined operation is performed, the proxy response terminal arm transmits a predetermined signal to the proxy response terminal unless it is determined that the incoming call is an incoming call from the predetermined partner.

【Example】

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. <First Embodiment> FIG. 1 is a block diagram of an exchange system including a private branch exchange according to a first embodiment of the present invention. In FIG. 1, reference numeral 100 denotes a private branch exchange of the present embodiment, and 101 denotes a terminal A accommodated in the private branch exchange 100, which is designated as a destination of a direct call from the ISDN 107. Reference numeral 102 denotes a terminal B also accommodated in the private branch exchange 100, and a pickup response is made. 107 is an ISDN to which the private branch exchange 100 is connected. In the private branch exchange 100, reference numeral 103 denotes a RAM, and the terminal B10
2 has a first memory 112 which is a pickup designated calling number storage means for storing the pickup designated calling number registered from 2. Reference numeral 104 denotes a central control unit, which has a recording function for recording the pickup designated calling number registered from the terminal B in the first memory 112, an identification function for identifying the calling number sent from the ISDN 107, and the above two kinds of calling numbers. It has a comparison function for comparison and a service providing function for providing a pickup service. Reference numeral 105 denotes a time switch, and reference numeral 106 denotes a trunk interface unit for accommodating ISDN office lines, and sends a message sent from the ISDN 107 to the central control unit 104. 108
Is a tone generator for sending various tones via the time switch 105. 109a and 109b are line interfaces accommodating the terminals A101 and B102, and mediate control information between the terminals A101 and B102 and the central control device 104. Reference numeral 111 denotes a voice message generating unit, which sends various voice messages via the time switch 105 similarly to the tone generating unit. Reference numerals 112 to 116 denote areas in the RAM 103. Reference numeral 112 denotes a first memory which is a pickup designated calling number storage means in this embodiment, and has a block for registering a plurality of pickup designated calling numbers for each terminal. FIG. 2 shows a configuration example of the first memory 112. Reference numeral 113 denotes a second memory serving as message storage means in the present embodiment, and an example of the storage message is shown in FIG. Reference numeral 114 denotes a third memory which is a priority storage unit in this embodiment, and has a block for storing a plurality of priorities for each terminal. FIGS. 4A and 4B show an example of the configuration of the third memory 112. FIG. Reference numeral 115 denotes a fourth memory serving as an incoming call storage unit in this embodiment, and FIG. 5 shows an example in which a plurality of incoming destinations are stored in the order of incoming calls. Reference numeral 116 denotes a fifth memory serving as a calling number storage unit in the present embodiment, and a configuration example is shown in FIG. As shown in FIG. 6, a block for storing a calling number is provided for each B channel (for each line) of the user of the ISDN 107 and the network interface. Reference numeral 120 denotes a ROM in which programs for adding various functions to the central control device 104 are stored. A procedure for registering the pick-up designated calling number of the present embodiment having the above configuration will be described with reference to the flowchart of FIG. In the following description, a registration procedure from terminal B102 will be described as an example, but the same applies to terminal A101. As the type of the terminal B102, two types of a telephone or a multifunctional telephone having a function button for a pickup service can be considered. Here, the telephone will be described as an example. In step S701, when off-calling is performed to perform a calling process using the terminal B102, the central control unit 104 detects this, detects a call from the terminal B102, and activates the tone generating unit 108 via the time switch 105. The dial tone from tone generator 108 is sent to terminal B102. After confirming the dial tone in step S702, the operator of terminal B102 inputs a preset registration special number and a pickup designation calling number to be registered. As for the pick-up designated calling number to be registered, not all digits of the telephone number are necessarily registered, but may be rounded and registered. For example, if you want to pick up a call from the Sapporo area, use the area code "011" for the Sapporo area.
Register Then, regardless of the last four digits of the subscriber number, a pickup response can be made to the incoming call of the toll number "011". The pick-up designated calling number input in this way is sent to the central control unit 104 via the line interface B109b. For this reason, the central control unit 104 checks whether or not the pickup designated calling number input in the subsequent step S703 can be registered. Step S703
The check items for whether the pickup designated calling number can be registered are as follows: whether the pickup designated calling number is not registered twice, and whether the block assigned to the terminal B102 in the first memory 112 has an empty space. and so on. If the registration is possible, the process proceeds to step S704, where the central control unit 104 instructs the tone generation unit 108 to generate a registration confirmation tone and sends it to the terminal B102. Then, in step S706, the designated pickup number is registered in the first memory 112, and the flow advances to step S707. On the other hand, if registration is not possible in step S703, step
Proceeding to S705, the central control unit 104 instructs the tone generation unit 108 to generate a busy tone and sends it to the terminal B102 to send it to the terminal B102.
Proceed to S707. In step S707, the operator of the terminal B102 listens to the registration confirmation tone or the busy tone from the tone generation unit 108, confirms the registration of the registration special number and the pickup designated calling number or non-registration, turns on the hook, and ends the registration operation. Next, a procedure for deleting the pickup designated calling number of this embodiment will be described with reference to the flowchart of FIG. In the following description, as in the description of FIG. 7, a description will be given by taking the deletion means from the terminal B102 as an example. In step S801, when off-calling is performed to perform a calling process using the terminal B102, the central control unit 104 detects this, detects a call from the terminal B102, and activates the tone generating unit 108 via the time switch 105. The dial tone from tone generator 108 is sent to terminal B102. After confirming the dial tone in step S802, the operator of terminal B102 inputs a preset deletion special number and a pickup designation number to be deleted. The input pickup designation number is sent to the central control unit 104 via the line interface B109b. For this reason, the central control unit 104 executes the following step S
A check is made as to whether the pickup designated calling number input in 803 can be deleted. Check item is 1st
Whether there is a pick-up designated calling number dialed into the memory 112, or the like. If the deletion is possible, the process proceeds to step S804, where the central control unit 104 instructs the tone generation unit 108 to generate a deletion confirmation tone and sends it to the terminal B102. Then, in step S806, the designated pickup number is deleted from the first memory 112, and the flow advances to step S807. On the other hand, if deletion is not possible in step S803, step S8
Proceeding to 05, the central controller 104 instructs the tone generator 108 to generate a busy tone, and sends it to the terminal B 102 to send it to step S8.
Go to 07. In step S807, the operator of the terminal B102 listens to the deletion confirmation tone or the busy tone from the tone generation unit 108, deletes the deletion special number and the pickup designated calling number, or confirms that deletion is impossible, and turns on the hook, and the deletion operation ends. Next, the operation of the present embodiment when a direct call is received from the ISDN 107 to the terminal A101 and the terminal B102 makes a pickup response will be described with reference to the flowchart of FIG. When there is an incoming call from ISDN 107, the call setup message is sent to the trunk interface 10 as shown in step S901.
It is sent to the central controller 104 via 6. Central control unit 10
4 decodes the call setting message and, if the calling number is included, stores the calling number in the fifth memory 116.
The central controller 104 subsequently determines that the call is a direct call to the terminal A101 from the called number or the called subaddress in the call setting message, and the line interface A1
09a is instructed to activate the incoming call to the terminal A101. Terminal A10
1 detects the incoming signal and rings the ringer. In the following step S902, the line interface A109a of the central control device 104 monitors the response of the terminal A101. In this case, for example, in step S903, the terminal
A terminal B102 different from A101 goes off-hook and dials a predetermined pickup response special number. Here, it is assumed that the operator of terminal B102 wants to respond only to an incoming call that can be handled by the operator of terminal A101 because the operator of terminal A101 is absent, for example. In this case, the response from the terminal B102 is sent from the line interface B109b to the central control device 104. In step S904, the central control device 104, for example,
From the data that the terminal 1 and the terminal B 102 belong to the same pickup group, it is determined that the response is a pickup response to the incoming call to the terminal A 101, and the terminal A 101 in the fifth memory 116 is determined.
Check the memory area corresponding to the line arriving at
Check whether the calling number has been sent from DN107. If there is no calling number in the fifth memory 116, the process proceeds to step S911, and the fact that the pickup response to the terminal B 102 is not possible is transmitted to the tone (for example, busy tone) transmitted from the tone generator 108 via the time switch 105. Notify The error processing in step S911 is processing for sending a busy tone to the terminal B102 in this embodiment. Then, in the next step S912, the operator is urged to end the call, and the process ends. On the other hand, if there is a calling number in the fifth memory 116, the process proceeds to step S905, and the terminal B 102 sends the picked-up designated calling number of the assigned range to which the terminal B102 wants to make a pickup response from the first memory 112 to 1.
Take out one. The central control unit 104 checks whether or not the pickup designated calling number is registered in the first memory 112 in the following step S906. If none is registered, the process proceeds to step S911, as in the case where there is no calling number in the fifth memory 116, and notifies the terminal B102 that a pickup response is not possible by using a tone, and returns to step S912.
Proceed to. On the other hand, in step S906, if there is a pickup designated calling number in the fifth memory 116, the process proceeds to step S907, where the ISDN calling number in the fifth memory 116 is compared with the pickup designated calling number in the first memory 112. If the two calling numbers do not match, the process proceeds to step S908, where the first memory
From 112, the pick-up designated calling number registered in the next area is extracted, and the process returns to step S906 to compare both calling numbers. The procedure from step S906 to step S908 is repeatedly executed until the calling numbers match or until all the pickup calling numbers registered in the first memory 112 are executed. If both calling numbers match, step S9
From step 07, the process proceeds to step S909. At the time of an incoming call from ISDN 107, since terminal B102 is from a caller who wants a pickup response, central controller 104 stops the incoming call at terminal A101, and at step S910, terminal B102 and trunk interface Ace unit 106 is connected via time switch 105, and terminal B1
02 and ISDN107 are available. As described above, according to the present embodiment, in a private branch exchange accommodating ISDN and a plurality of terminals, it is possible to pick up only the calling number that the terminal operator wants to pick up from among the calling numbers notified by ISDN. This has the effect of not picking up incoming calls from callers that the operator does not want to pick up. <Second Embodiment> In the first embodiment described above, a case has been described in which an error is notified to the operator using the tone generator 108 in FIG. 1, but the present invention is limited to the above example. Instead, the reason is more surely conveyed to the operator by voice message within the scope of the present invention. As described above, a second embodiment according to the present invention will be described below in which when pickup cannot be performed using the voice message generating unit instead of the tone generating unit 108, the reason is more reliably transmitted to the operator by voice message. . The following description will be made only for operations different from those of the first embodiment, and description of common parts will be omitted. In the flowchart of FIG. 9, in the second embodiment, when the terminal B102 picks up a response to the direct call from the ISDN 107 to the terminal A101 in step S903, the central controller 104 proceeds to step S904, and stores the fifth memory 116 in the fifth memory 116. It checks to determine whether there is a calling number from ISDN. If there is no calling number, the process proceeds to step S911. In the case of the present embodiment, the voice message generating unit 111 notifies the terminal B102 via the time switch 105 that "the other party's calling number has not been notified". Is sent. On the other hand, if there is a calling number from ISDN in step S904, one pickup designated calling number is extracted from the first memory 112 in step S905. Here, if there is no pickup designated calling number to be extracted from the beginning, the process proceeds from step S906 to step S911. In this embodiment, this error processing is the first
Unlike the embodiment, the voice message "Pickup designated calling number is not stored" is transmitted from the talkie device 111 to the terminal B102. Then, the process proceeds to step S912. On the other hand, when the pickup designation calling number is stored in the first memory 112, the pickup designation calling numbers are extracted one by one in steps S906 to S908 and compared with the calling number from ISDN. Even if the pick-up designated calling number is extracted to the end, it does not correspond to the calling number from ISDN, and if there is no pick-up designated calling number to be extracted next, the process proceeds from step S906 to step S911. The other party's calling number does not correspond to the pick-up designated calling number. ' The content of the voice message is merely an example, and can be freely selected by the operator. <Third Embodiment> In the first and second embodiments, when there is no calling number from ISDN, when no pickup-designated calling number is stored, and when the calling number from ISDN and the pickup-designated calling number are not stored. In the case where three types of pickup cannot be performed in the case where the numbers do not match, the reason is communicated to the operator using the tone generator 108 and the voice message generator 111, respectively. However, when the terminal connected to the private branch exchange according to the present embodiment is a terminal having a message display function of displaying a message when the private branch exchange sends a message, such as a multifunctional telephone, Tone generator 108 and voice message generator 111
Instead of the tone or voice message, data indicating the content of the error stored in the memory can be sent as a message from the private branch exchange to the terminal. FIG. 3 shows an example in which three kinds of messages indicating the reason why the pickup cannot be performed are stored in the second memory 113. In the following description, the different parts from the above-described embodiment will be described, and the description of the operation of the common parts will be omitted. The pickup operation will be described with reference to the flowchart of FIG. 9 and FIG. In step S903, the terminal
Terminal B102 picks up the incoming call to A101. If the calling number has not been notified from the ISDN in step S904, the central controller 104 sends a reason message 301 to the terminal B 102 in step S911. If the pick-up designated calling number cannot be extracted from the beginning in step S906, a reason message 302 is sent to the terminal B 102 in step S911. In step S906, if the calling number from the ISDN and the pick-up designated calling number do not match, and if the pick-up designated calling number cannot be extracted, a reason message 303 is sent to the terminal B102. <Fourth Embodiment> Also in the fourth embodiment, the hardware configuration is shown in FIGS.
A configuration similar to the above-described first to third embodiments shown in FIG. 6 is sufficient. Therefore, hereinafter, the fourth embodiment different from the first to third embodiments will be described.
The operation of the embodiment will be described with reference to the flowchart of FIG. In FIG. 10, the same processes as those in FIG. 9 are denoted by the same step numbers. In the flow chart of FIG. 10, in each of the above-described embodiments, when there is no calling number from ISDN in the fifth memory 116, or when no pick-up designated calling number is registered in the first memory 112, or If the ISDN calling number and all the registered pick-up designated calling numbers do not match, a tone or an alternative means indicating that pick-up response is not possible to the operator of terminal B102 is required. The notification has been made and the termination of terminal B102 has been prompted. On the other hand, in the present embodiment, a request detection function, which is a request detection means for detecting a forced pickup request from the terminal B102, is added to the central control device 104, and the pickup response of the terminal B102 is added to the central control device 104. To give permission. here,
The forced pickup request is a request notified by predetermined dial information or special key information. In this embodiment, in step S911, the terminal B1
02 is notified by the tone generation unit 108, the voice message generation unit 111, or the reason message that the pickup response is not possible, the central control unit 104 returns to the terminal B102 in the following step S950. Monitor for forced pickup requests. If the terminal B102 has made a forced pickup request, the process proceeds to step S909, in which the incoming call to the terminal A101 is stopped, the pickup response of the terminal B102 is permitted, and the communication between the terminal B102 and the ISDN 107 is permitted in step S910. On the other hand, if the terminal B102 does not make a forcible pickup request in step S950, the process proceeds to step S912 and ends when the terminal B102 ends the call. <Fifth Embodiment> When there are a plurality of incoming calls from the ISDN 107 and a pickup is to be made for them, it is necessary to determine which incoming call is to be picked up. In the fifth embodiment, a description will be given of a case where priorities are assigned to a plurality of pickup designated calling numbers registered by a terminal in order to cope with such a case. In this case, the pick-up designated calling number is plural, but if only one number is registered, the ISDN
Even if there are multiple incoming calls from 107, only one that can be picked up is determined, so there is no need to consider this. The terminal B102 stores priorities in the third memory 114 for a plurality of designated pickup numbers prior to pickup. FIGS. 4A and 4B show a third memory 114 in which priority information corresponding to the pickup designated calling number stored in the first memory 112 is stored. This priority information may be a serial number equal to the number of the pickup designation number registered as shown in FIG. 4 (A), or a pickup designation designation having a higher priority as shown in FIG. 4 (B). Binary data such as "1" for a number and "0" for a pickup designation calling number with a low priority may be used. Now, in the flowchart of FIG. 11, step S1 is performed.
When a direct call is received from ISDN 107 to a plurality of terminals at 101, central controller 104 monitors responses of the terminals at step S1102. When the terminal B 102 picks up the response in step S1103, the central control unit 104 looks up the priority information stored in the third memory 114 in step S1105, and extracts the highest priority designated pickup number from the first memory 112. When there are a plurality of items having the highest priority (priority 1) as shown in FIG. 4B, only one of them is selected. Then, the central controller 104 extracts one calling number notified from the ISDN among the incoming calls in step S1106 from the fifth memory 116, and compares them in step S1107. If they match, the flow advances to step S1112 to stop the incoming call of the terminal that has received the direct call.
The communication path of the SDN 107 is connected via the time switch 105 to establish a communication state. On the other hand, if it is determined in step S1107 that the highest priority pick-up designated calling number does not match the calling number notified from the ISDN of the incoming call, the process proceeds to step S1108 to check whether there is another incoming call. If there is another incoming call, repeat step S1
Proceed to 106 and enter the ISDN calling number from the incoming
The procedure is repeated when one more is extracted and compared. If there is no other incoming call in step S1108, it means that the calling number from the ISDN corresponding to the pickup priority designated calling number has been lost, and the process proceeds from step S1108 to step S1109, and thereafter, the next priority picked up. The above-mentioned comparison is performed for the designated calling number. That is, first, in step S1109, it is checked whether there is a pickup designation number of the next priority. If there is a pickup designation number having the next priority, the process advances to step S1111 to make the next priority the highest priority. In that regard, the process returns to step S1105, and the calling number from the ISDN is extracted one by one from the fifth memory 116, and the comparison as in steps S1106 to S1108 described above may be performed. As shown in FIG. 4 (B), the next-priority one (if the one with the priority 1 remains, the next priority is given; if not, the one with the priority “0” is given the next priority) If there is more than one, only one of them is selected, and the highest priority is compared as in steps S1106 to S1108 described above. In this way, the calling party number from ISDN is compared with the calling party number from the higher-priority pick-up designated number, and when there is no match up to the end and there is no more pick-up designated calling number to be extracted, step S1109 is executed. Proceed to S1110 and pick up cannot be performed.
As in the embodiment, the tone is transmitted to the terminal B102, and the process ends. <Sixth Embodiment> In the following sixth embodiment, when a plurality of pickup designated calling numbers are registered, there are a plurality of incoming calls from the ISDN 107, and when an attempt is made to pick up the incoming calls, which incoming call is picked up. An example will be described in which pickup is performed by prioritizing the order of arrival to determine whether to make the call. In this embodiment, when a plurality of incoming calls are received from the ISDN 107, the order of the incoming calls is stored in the fourth memory 115. FIG. 5 shows an example of storage in the fourth memory 115. In the example of FIG. 5, the calling number from ISDN is stored in the address indicating the order of incoming calls, but the storage address of the calling number stored in the fifth memory 116 may be stored in the fourth memory 115. . The procedure for picking up in the sixth embodiment will be described with reference to the flowchart of FIG. During a direct call from ISDN to a plurality of terminals in step S1201, the central control unit 104 stores the fourth memory 11
In step S1203, when the terminal B102 makes a pickup response at this time, the process proceeds to step S1204, and the central control device 104 stores the incoming call order in the fourth memory 115, as shown in step S1203. The oldest incoming ISDN calling number is extracted from the incoming call order, and one pick-up designated calling number is extracted from the first memory in step S1205,
In step S1206, the two are compared. Oldest incoming ISDN
If the calling party number matches the pickup designated calling party number, the flow advances to step S1211. Then, as shown in the first embodiment or the fifth embodiment, the pickup for the terminal B102 is performed in step S1212. On the other hand, if they do not match, the flow advances to step S1207 to check whether or not there is another pickup designated calling number in the first memory 112. If there is another pickup designated calling number in the first memory 112, the process proceeds to step S1205,
Extract one and compare again. If there is no other pick-up designated calling number in the first memory 112, it means that there is no matching pick-up designated calling number for the incoming call, so the process proceeds to step S1208 and thereafter, and the next old incoming call is compared with the calling number. Perform That is, it is checked whether there is another incoming call. If there is, the process proceeds to step S1210, the next oldest incoming call is selected based on the order of incoming calls stored in the fourth memory 115, the oldest incoming call is made, and the step is repeated.
Proceeding to S1204, steps S1205 to S1207 are compared. In this way, the possibility of pick-up is checked in the order of incoming calls. If pick-up is not completed to the end, the process proceeds to step S1209, and there is no incoming call to be extracted. Then, it is notified that the pickup cannot be performed, and the processing ends.

【The invention's effect】

As described above, according to the present invention, if the incoming call is from a predetermined partner, the user can connect to the predetermined partner by a predetermined operation. If it is not determined that the call is a response, the terminal that has tried to make a proxy response sends a predetermined signal, so that it is possible to surely know that the call has not been received from a predetermined partner.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a private branch exchange according to one embodiment of the present invention, FIG. 2 is a diagram showing an example of the configuration of a first memory which is a pickup calling number storage means of this embodiment, and FIG. FIG. 4 is a diagram showing a configuration example of a second memory which is an example message storage unit, FIG. 4 is a diagram showing a configuration example of a third memory which is a priority order storage unit of the present embodiment, and FIG. 5 is an incoming call storage unit of the present embodiment. FIG. 6 is a diagram showing a configuration example of a fifth memory which is a calling number storage means of the present embodiment, and FIG. 7 is a diagram showing a procedure for registering a pickup calling number of the present embodiment. FIG. 8 is a flowchart showing a procedure for deleting a pickup calling number in this embodiment. FIG. 9 is a flowchart showing a pickup procedure in the first, second and third embodiments according to the present invention. A flowchart showing a pickup procedure of a fourth embodiment according to the present invention. FIG. 11 is a flowchart showing a registration order priority pickup procedure of the fifth embodiment according to the present invention, and FIG. 12 is a flow chart showing a call order priority pickup procedure of the sixth embodiment according to the present invention. In the figure, 100... Private branch exchange, 101... Terminal A, 102... Terminal B, 103... RAM, 104... Central control device, 105... Time switch, 106.
… ISND, 108… tone generator, 109a, 109b… line interface, 111… voice message generator, 112
...... First memory, 113 ... Second memory, 114 ... Third memory, 115 ... Fourth memory, 116 ... Fifth memory, 120 ... R
OM.

Continuation of the front page (56) References JP-A-54-36107 (JP, A) JP-A-54-130808 (JP, A) JP-A-60-12054 (JP, A) JP-A-63-246957 (JP) , A) JP-A-2-155350 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) H04Q 3/58 H04M 3/42

Claims (7)

(57) [Claims] 1. A sending means for sending an incoming signal to an incoming terminal when an incoming call is received, and when a predetermined operation is performed on a proxy response terminal other than the incoming terminal, the incoming call is an incoming call from a predetermined partner. A connection means for connecting the proxy response terminal and the predetermined partner; and determining that the incoming call is from the predetermined partner when the predetermined operation is performed on the proxy response terminal. Transmission means for transmitting a predetermined signal to the proxy response terminal if not performed, the private branch exchange. 2. The private branch exchange according to claim 1, further comprising: a judging means for judging whether or not the incoming call is from the predetermined party according to a calling number received from an outside line at the time of the incoming call. A private branch exchange, comprising: 3. The private branch exchange according to claim 1, wherein said transmitting means transmits a predetermined tone signal or a predetermined voice message signal to said proxy response terminal. Private branch exchange. 4. The private branch exchange according to claim 1, wherein said transmitting means determines whether a calling number has not been notified from an external line and whether the calling number received from said external line has a predetermined number. A private branch exchange, which sends a different signal to the proxy response terminal depending on whether the calling number is not used. 5. The private branch exchange according to claim 1, wherein the connection unit is configured to connect to the proxy response terminal when the incoming call is not determined to be an incoming call from the predetermined party. Second
The private branch exchange connects the proxy response terminal and the predetermined partner when a predetermined operation is performed. 6. The private branch exchange according to claim 1, further comprising: storage means for storing a plurality of calling numbers in correspondence with priorities; According to the plurality of calling numbers stored in the means and the priority order, an incoming call having a calling number with a high priority order is selected from the plurality of incoming calls as an incoming call to be connected to the proxy response terminal by the connection means. A private branch exchange, comprising: selection means. 7. The private branch exchange according to claim 1, further comprising, when there are a plurality of incoming calls, said connection means connecting said proxy response terminal to said proxy response terminal in the order in which the incoming calls occurred. Selecting means for selecting, from the plurality of incoming calls, an incoming call having the oldest incoming call order as an incoming call to be connected.