JPH10322736A - Private exchange - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an operator from forgetting to set DND(do not disturb) in the telephone sets of a group at all at the time of setting DND in a group unit. SOLUTION: When the DND key of an extension telephone set 21 is depressed, a control part 2 receives it through an extension circuit 121, searches the group to which the extension telephone set 21 belongs from data in a storage part 3 and sets DND in all the extension telephone sets 21-2n belonging to the group. When a call arrives at the extension telephone sets 21-2n belonging to the group, the extension telephone set of a calling source or a line wire is connected to a tone generation circuit 151 and a busy tone is returned to the calling source. A caller hears the busy tone and cuts the call. Thus, the incoming call arrives at the extension telephone set where the setting of DND is forgotten in the group and a calling signal continuously rings as it is. Consequently, the caller is prevented from waiting for a response although all persons in the group are absent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a private branch exchange having a function of setting and canceling a call rejection for any extension telephone under management.

[0002]

2. Description of the Related Art Conventionally, in a private branch exchange of this kind, if one does not want to leave a seat or receive an incoming call, the extension telephone is rejected (Do Not Disturb: hereinafter "DN").
D "), a busy tone is returned to the person who calls the user. This DND is used when the entire group leaves the seat in a meeting or the like, or when the entire group In a concentrated time when you do not want to receive incoming calls because you want to concentrate on the phone, it is executed by setting to the phone that everyone has, but in such a case even if one phone forgets to set DND In this case, a call to this group will ring at the telephone set for which the DND setting has been forgotten, and the work will be disturbed during a concentrated time, and all the members will be absent in a meeting or the like. In this case, the caller has to listen to the ringing tone forever, even though all the callers are away from the desk.

[0003]

As described above, in the conventional private branch exchange, when all members of a certain group (for example, section unit) leave their seats at a meeting or the like, or during the group's concentrated time, their own extension DND settings must be made on all of the phones, and if there is even one phone that has forgotten to set DND, incoming calls to this group will be DND
The ringtone will ring on the phone that you forget to set. For this reason, the caller wastes time continually listening to the ringing tone, even though all members of the called group are away from the desk, while the group with concentrated time is working. There is a problem that is disturbed.

Therefore, the present invention has been made to solve the above-described problem. When setting DND in a group unit, even one of the telephones belonging to this group that has been forgotten to set is output. The purpose is to provide a private branch exchange that can be kept away.

[0005]

According to a first aspect of the present invention, there is provided a private branch exchange having a function of setting a call rejection in which a call is not made even if there is an incoming call to a managed extension telephone. Group setting means for grouping and setting an arbitrary plurality of telephones, and an incoming call rejection which is provided in one or all of the extension telephones and issues a request to set a call rejection to all the extension telephones of the group to which the extension telephone belongs. A setting requesting means, and when a call rejection setting request is made by the call rejection setting requesting means, all the extension telephones belonging to the group to which the extension telephone which issued the call rejection setting request by searching the group setting means And an incoming call rejection setting means for setting incoming call rejection for each extension telephone.

With such a configuration, when it is desired to set the call rejection for all the extension telephones of a certain group, when the DND key which is the call rejection setting request means of one extension telephone belonging to the group is pressed, the call rejection is performed. The setting means searches the group setting means, specifies all the extension telephones belonging to the group to which the extension telephone which has issued the call rejection setting request belongs, and sets the rejection without fail for each extension telephone.

According to a second aspect of the present invention, a part or all of the extension telephones are provided with a call rejection release request means, and when the call rejection release request is made by the call rejection release request means, the group setting means is searched. Call rejection release means for specifying all the extension telephones belonging to the group to which the extension telephone that issued the call rejection release request belongs and releasing the call rejection setting set for each extension telephone. ing.

With such a configuration, when it is desired to cancel the incoming call rejection of a group for which incoming call rejection is set, when the DND key serving as the incoming call rejection cancel request means of one extension telephone belonging to the group is pressed, the incoming call is rejected. The rejection canceling means searches the group setting means to identify all the extension telephones belonging to the group to which the extension telephone that has issued the call rejection release request belongs, and completely rejects the incoming call rejection setting set for each extension telephone. To release.

According to a third aspect of the present invention, there is provided a counting means for counting the number of times of non-response for each group when an incoming call is received by an extension telephone belonging to the group and the result is a non-response. If the counted number of non-responses exceeds a predetermined value, the system is provided with automatic call rejection setting means for setting call rejection to all extension telephones belonging to the corresponding group.

[0010] With this configuration, if a certain group receives a plurality of incoming calls and no answer is received without any off-hook, all members of this group are absent and the extension telephone of the group is set to reject incoming calls. If the number of unanswered calls continuously counted by the counting means exceeds a predetermined value, the automatic rejection setting means automatically sets rejection to all extension telephones belonging to the corresponding group. To set.

According to a fourth aspect of the present invention, when an extension telephone which transmits a call is detected from the extension telephones belonging to the group in which the call rejection is set, the call rejection automatic release of all the extension telephones belonging to the group is canceled. It has a configuration provided with a releasing means.

With such a configuration, the fact that there is an extension telephone that makes a call from among the extension telephones belonging to the group for which incoming call rejection is set means that at least one person who can answer the telephone exists in this group. When the call rejection automatic canceling means detects an extension telephone set to be transmitted from among the extension telephones belonging to the group for which the call rejection is set, the call rejection setting is canceled for all the extension telephones belonging to this group.

The invention according to claim 5 is a communication device, wherein the call rejection setting means sets a call rejection for all the extension telephones belonging to the group, a counting means for starting time counting, and the counting means for counting a predetermined time. The system is provided with a call rejection automatic canceling means for canceling the call rejection setting of all the extension telephones belonging to the group.

With such a configuration, since the time during which all members of the group will be absent in a meeting or the like is generally determined, the automatic rejection rejection means of the call rejection automatically releases all the extensions belonging to the group when the counting means has counted for a predetermined time. Cancel the call rejection setting on the phone. As a result, around the end of the meeting, the rejection of incoming calls for the extension telephones of the group is automatically released, so that forgetting to release the rejection of incoming calls is prevented.

According to a sixth aspect of the present invention, there is provided a time setting means for setting an arbitrary time zone for each of the groups, and only the time zones set in the time setting means are received by all extension telephones belonging to the corresponding group. An automatic rejection setting means for setting rejection is provided.

With such a configuration, the automatic call rejection setting means can be used, for example, in a case where the entire group is absent in a conference or the like during a certain time period and it is troublesome to set the call rejection for the extension telephones of the group each time. Performs call rejection setting for all extension telephones belonging to the corresponding group only in the time zone set in the time setting means.

According to a seventh aspect of the present invention, the arbitrary time zone is:
It has a configuration that can be distinguished between day mode and night mode.

With such a configuration, for example, since there is no person in the night mode, the automatic rejection setting means automatically sets rejection for all extension telephones in a certain group when the time zone of the night mode is reached.

In the invention according to claim 8, when an extension telephone belonging to the group for which the call rejection is set receives a call, a busy tone is returned to the caller's telephone, or the incoming call is set in advance. Designation means for designating whether to transfer to an extension terminal, and when there is an incoming call to an extension telephone belonging to the group for which call rejection is set, return a busy tone to the caller telephone according to the designation contents of the designation means, Alternatively, a response control means for transferring an incoming call to the set extension terminal is provided.

With this configuration, when an incoming call is received at an extension telephone belonging to the group for which incoming call rejection is set, the response control means returns a busy tone to the caller, or returns the incoming call to the caller. Transfer to the extension terminal such as the set proxy answering telephone or announcement machine.

According to a ninth aspect of the present invention, the operation of the response control means for returning a busy tone to the transmission source or transferring the busy tone to a predetermined extension terminal is changed according to a preset time zone. Further, a configuration is also provided in which the extension terminal of the transfer destination is changed according to the time zone.

With such a configuration, the response control means returns a busy tone to the caller or an incoming call depending on the time zone in which the extension telephone belonging to the group for which call rejection is set is received. Is transferred to an extension terminal such as a proxy response telephone set or an announcement machine set according to the time.

According to a tenth aspect of the present invention, when an incoming call is received at an extension telephone belonging to the group in which the incoming call rejection is set, it is determined whether the incoming call is from an extension or an outside line. It is provided with a response control means for returning a medium tone or selecting an extension terminal of a connection destination set in advance according to the distinction and transferring the incoming call to the selected extension terminal. .

With this configuration, when an extension telephone belonging to the group for which the call rejection is set receives a call from an extension, it is highly likely that the call is from an internal person.
The response control means returns a busy signal to the caller, or transfers the incoming call to an announcement machine to notify the absence of the call. However, if there is an incoming call from an outside line, the call may be from a customer, so the response control means transfers the incoming call to a substitute answering telephone so as to respond to the substitute.

[0025]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first example of the private branch exchange of the present invention.
FIG. 2 is a block diagram showing an embodiment of the present invention. In the figure, reference numeral 1 denotes an exchange body that accommodates extension terminals and external lines and performs exchange connection between extensions, between an extension and an external line, and 2 denotes individual control such as carrier selection control and communication control and control of the entire system. The control unit 3 performs various programs, data, and tables necessary for the operation of the control unit 2, a storage unit for storing set function contents and various information generated in the exchange, and a storage unit 4 for the exchange body 1. 3 is a maintenance terminal for inputting various data to be set / registered, 5 is an announcement machine for sending a pre-recorded message or the like to a connection destination, 6 is a relay console, 21 to 2n are extension telephones which are extension terminals, 31 to 31 3m is an outside line.

Here, the exchange body 1 is connected to the extension telephone 21.
A switching circuit 111 for exchanging a communication path between the extension telephones 2 to 2n or a communication path between the extension telephones 21 to 2n and the external lines 31 to 3m, an extension circuit 121 to 12n serving as a connection interface between the extension telephones 21 to 2n, and the announcement machine 5. An office line circuit (subscriber circuit) 1 that serves as a connection interface between the extension circuit 12p serving as a connection interface and the outside lines 31 to 3m, and detects incoming calls, closes a DC loop for line capture, and the like.
31 to 13 m, a data highway 141 for connecting the above-described functional elements and transmitting control data and the like, a tone generating circuit 151 for generating various tones such as a busy tone, and a relay stand 6.
Are connected to each other. In accordance with a control program stored in advance in the storage unit 3, the control unit 2 controls the local line circuits 131 to 13m and the extension circuits 121 to 12n.
The switching circuit 111 is controlled so that a communication path is formed between them, thereby enabling a normal switching operation.

FIG. 2 is a block diagram showing functions stored in the storage unit 3 and constituted by a program for controlling the control unit 2. Means 41 for grouping telephones, means 42 for setting and canceling DND in group units, means 43 for transferring a call arriving in a group in which DND is set in group units to a predetermined connection destination, operation of telephones Means 4 for setting and releasing DND in group units
4. A means 45 for automatically setting a group-based DND when the number of consecutive unanswered calls to the group is equal to or greater than a predetermined number, and automatically setting the corresponding DND when a timeout occurs. Means 46 for canceling the setting of the group DND, when one of the members in the group for which the group-based DND is set performs a call operation,
A unit 47 for automatically canceling the DND of the group unit, a unit 48 for specifying a connection destination for transferring a call received to a group in which the DND of the group unit is set, a unit 49 for specifying a timeout period, a DND for the group unit Is automatically stored in the storage unit 3.

FIG. 3 is a detailed plan view of the extension telephone 21 shown in FIG. 1 (the same applies to other extension telephones). 211a is a DND setting and release key for individually setting and releasing DND for each extension telephone, and 211b is a DND setting and release for each group to which DND is set and released for each group to which the extension telephone belongs. Key (sometimes simply referred to as the DND key), 211c is the extension number 20 of the extension telephone.
Reference numeral 212 denotes a dial pad, 213 denotes a display such as an LCD for displaying various information, and 214 denotes a handset.

Next, a description will be given of an operation of setting a DND for each extension telephone, which is conventionally performed, according to the present embodiment. For example, when the DND setting / release key 211a of the extension telephone 22 is pressed, the control unit 2 receives the key via the extension circuit 122 and stores it in the storage unit 3.
Set call rejection for. Then, for example, extension phone 2
1 makes a call to the extension telephone 22, the extension telephone 2
The control unit 2 sends a tone generation circuit 1 to the extension telephone 21 that has made a call if the DND has been set in the storage unit 3 for the extension telephone 22 in advance even if the extension telephone 2 can receive a call.
51 will return a busy tone. If the extension number (directory number) of the extension telephone 22 is set in the storage unit 3 as a multi-appearance for the extension telephones 23 to 2n, when the extension telephone 21 makes a call to the extension telephone 22, the extension telephones 22 to If at least one of the 2n extension telephones is in a state in which it can receive a call and no DND is set, the extension telephone rings, and if there is no extension telephone, the extension telephone 21 that made the call is called. You will hear the busy tone.

Therefore, for example, if the extension telephones 23 to 2n belong to a certain group, and even if one of them is not set to DND, the extension telephones 22 to 2n are assigned to the extension telephones of the group. In this case, the incoming call is made to the extension telephone for which the DND has not been set, and the incoming call rings. Also, for example, the subscriber line 3
When an incoming call is received from the extension 1 to the extension telephone 22, the same operation as described above is performed only by replacing the extension 31 with the extension 31.

The above description shows an example in which the directory number of the extension telephone 22 is set to multi-appearance to the extension telephones 23 to 2n.
In some cases, the three directory numbers are set to have a multi-appearance.

FIG. 4 is a schematic diagram showing an example of the configuration of a table stored in the storage unit 3. Extension telephones 21 and 2
table 51 for storing groups to which each of the n belongs
A table 52 for storing a connection destination for forwarding a call received to a group in which a group-based DND is set, and a table 53 for storing the number of non-responses for automatically setting a group-based DND. A table 54 for storing, for each group, a timeout period for releasing DND for each group, a table 55 for counting the number of non-responses for each group, and a table for managing the setting / release status of DND for each group in a group correspondence. 56
And

Of these tables, a table 51 is provided by means 41 for grouping the extension telephones shown in FIG. 1, a table 52 is provided by means 48 for designating a connection destination of an incoming call to the group, and a table 53 is provided with a response count. The respective data are set in the table 54 by the means 49 for designating the timeout time by means 4A for designating the maximum value of.

The operation of the present embodiment with the above configuration will be described with reference to the flowcharts of FIGS. The flowchart of FIG. 5 shows a procedure for setting / releasing the DND for each group by an operation from the extension telephone (for example, pressing a function key of the extension telephone). For example, when the extension telephone 21 operates the DND key 211b for setting / releasing the DND in a group unit by the extension telephone 21, the control unit 2 inputs this through the extension circuit 121 in step 501, and then in step 502 It is determined whether or not DND is set for each group in the group, and if so, the process proceeds to step 503, and FIG.
The DND is canceled for each group in the table 56 corresponding to the group, and the timer for this group is cleared in the table 54 in FIG. If the group-based DND has not been set, the process proceeds to step 504 to clear the non-response counter in the table 55 in FIG. 4 and to set the group-based DND for the group in the table 56 in FIG. Then, the timer is set in the table 54.

Here, only a part of the extension telephones 21 to 2n is provided with a DND key 211b for setting / releasing a DND in a group unit. When the DND key 211b is pressed, the DND in a group unit is set. If done,
It is assumed that the control unit 2 displays on the displays 213 of all the extension telephones belonging to this group that DND is being set.

FIG. 6 is a flowchart showing a procedure for automatically setting the DND for each group when an incoming call to a certain group is not answered continuously more than a predetermined number of times. When there is an incoming call via the extension circuit or the local line circuit in step 601, the control unit 2 proceeds to step 60.
The process proceeds to step 2 to monitor whether or not the extension telephone of the called party has answered. If the answer is yes, the process proceeds to step 604 to clear the non-response counter in the table 55 of FIG. 4 and end the process. On the other hand, if the extension telephone of the destination is unanswered in step 602, the process proceeds to step 605 if the caller hangs up in step 603, and the process proceeds to step 605.
At 5, the non-response counter is incremented by one and the routine proceeds to step 606.

Next, the control unit 2 determines in step 606 whether or not the counter value of the non-response counter has exceeded the set value. If not, the process ends, and if it does, the process proceeds to step 607. In step 607, the control unit 2
The non-response counter is cleared in the table 55 of FIG. 4, the DND of the group in which the counter value of the non-response counter exceeds the set value is set in the table 56 of FIG. Pass control to response processing.

FIG. 7 is a flowchart showing a procedure of the control unit 2 when an incoming call to a certain group occurs.
First, when there is an incoming call through the extension circuit or the local line circuit in step 701, the control unit 2 proceeds to step 702, and checks whether the group to which the incoming extension telephone belongs has set DND for each group. If not set, the process proceeds to step 705, where control is passed to the current incoming call process and the process ends.

On the other hand, if the DND for each group has been set in step 702, the flow advances to step 703 to determine whether or not a connection destination has been specified for the group with reference to the table 52 of FIG. If not, the process proceeds to step 706, where a busy tone is returned to the caller, and the process ends when the call is disconnected. Step 703
If the connection destination is designated by the user, the process proceeds to step 704 to transfer the incoming call to the connection destination. However, the connection destination described here refers to a proxy answering telephone (one of the extension telephones) and the announcement machine 5, which are set in advance in the table 52 of FIG. Have been.

FIG. 8 is a flowchart showing a procedure for automatically canceling the DND in group units. Control unit 3
Monitors whether or not the timeout time set in the table 54 of FIG.
When a timeout occurs, the process proceeds to step 802, and it is checked whether or not a group-by-group DND is set for the group that has timed out.
At 03, the DND of the group unit in the table 56 of FIG. 4 is released, the corresponding timer of the table 54 of FIG. 4 is cleared, and the process ends. Step 8
If the DND is not set for each group in 02, the process ends.

FIG. 9 is a flowchart showing a procedure when a call is made from an extension telephone. Control unit 2
Determines in step 901 whether or not the extension telephone for which the calling operation has been performed belongs to the group. If not, the process is terminated and control is passed to the current calling process.
If so, go to step 902,
The control unit 2 determines whether DND is set in the group to which the extension telephone on which the calling operation has been performed belongs,
If not set, the process ends and control is passed to the current outgoing call process. At step 902, the group is given a DN
If D is set, the control unit 2 proceeds to step 903 to release the DND of the group to which the extension telephone belongs in the table 56 of FIG. Clear the timer of the group to be transferred, and transfer control to the current transmission processing.

According to the present embodiment, the extension telephones 21 to 21
2n is divided into groups, and the extension telephones belonging to the group can be collectively set manually or automatically in units of this group, so that the user does not forget to set the DND among the extension telephones belonging to the group. Can be eliminated. For this reason, it is possible to prevent the extension telephone that forgot to set the DND from ringing due to an incoming call during the group's concentrated time and the concentrated time from being disturbed. Also, when the entire group is out of the office at a meeting or the like, the incoming call rings the extension phone for which the DND setting was forgotten, and the caller thinks that there is a person and calls the phone forever. Waste can be prevented.

Further, it is possible to manually cancel the DND of the extension telephone set with the DND in the group unit, and there is an extension telephone in the group in which the cancellation of the DND is forgotten. It is possible to prevent trouble. In addition, D in the group unit
The ND setting is automatically released when a predetermined time has elapsed, or automatically released when an outgoing call is made from an extension phone belonging to the group. It is also possible to eliminate a problem that the setting state of the DND in the group unit continues and that it is impossible to talk with the members of the group.

Furthermore, it is possible to select and set whether to return a busy tone to an incoming call of a group in which DND is set or to forward an incoming call to a preset connection destination. If the call is forwarded to the announcement machine, the situation can be explained to the caller and the response time can be notified, so that the caller can make a telephone call efficiently and efficiently.

Note that the DND for the extension telephone of the group
The simultaneous setting has the same effect in a configuration in which a predetermined special number or the like is dialed from the dial keypad 212 to the control unit 2 of the exchange body 1 in addition to the pressing of the DND key 211b shown in FIG.

FIG. 10 is a schematic diagram showing a main part of a private branch exchange according to a second embodiment of the present invention. The basic configuration of this example is the same as that of the first embodiment shown in FIG. 1, but DND stored in a storage unit (not shown) of this example corresponding to the storage unit 3 of FIG. The difference is that there are many setting tables related to, and the functions are further improved. Hereinafter, FIG.
The operation of this example will be described with reference to the configuration diagram of FIG.

In this example, there is a table a as shown in FIG. 10 (A). In this table a, it is possible to control whether or not DND is set for a group in a day mode and a night mode for a group. It has become. For example, if the table a is set so that the group of the extension telephones 23 to 2n is set to DND in the night mode, the control unit 2 checks this table a and enters the time of the night mode. Extension telephone 23
２2n are simultaneously set to the DND setting. Thereafter, when the night mode ends, the control unit 2 simultaneously releases the extension telephones 23 to 2n of the group from the DND setting.

It is to be noted that DND is not set immediately upon entering the night mode, but is started after an arbitrary set time elapses.
A configuration in which DND is set for each group may be adopted. Switching between the day mode and the night mode may be performed by setting a timer or manually.

Also, in this example, there is a table b as shown in FIG. 10B. In this table b, the change of the connection destination of the incoming call at the time of setting the DND in the day mode and the night mode corresponding to the group is provided. It can be controlled. For example, during the period in which DND is set in the group of extension telephones 23 to 2n, when there is an incoming call in this group during the time period of the day mode, the connection destination is a proxy answering telephone according to table b. Also, when the incoming call is in the night mode, the connection destination returns a busy tone by the tone circuit according to the table b. As a result, in the day mode time zone, there is a person who answers the proxy answering phone, so the connection destination is the proxy answering phone, and in the night mode time zone, the person answering the proxy answering phone returns, so the busy tone is heard. It is possible to automatically perform a rational change of the connection destination, for example,

Further, in this example, there is a table c as shown in FIG. 10C. In this table c, when the origin of the incoming call at the time of setting the DND is an outside line, the connection destination is set to the proxy answering telephone. On the other hand, when the source of the incoming call is an extension, the setting is made such that the connection destination is set to the announcement machine 5 corresponding to the group, so that the connection destination can be automatically changed by the transmission source.

In this example, there is a table d as shown in FIG. 10 (D). With this table d, the set time zone of DND can be set to an arbitrary time zone of 24 hours corresponding to the group. ing. For example, extension telephones 23-2n
Time from 14:00 to 15:00 in table d
When the setting is made, the control unit 2 checks the table d, and performs the setting of the DND simultaneously for the extension telephones 23 to 2n of the group from 14:00 to 15:00.

According to the present embodiment, since the table group shown in FIG. 10 is provided in addition to the table shown in FIG. 4, the functions related to the DND setting are abundant and the usability is improved accordingly. However, the basic effects are the same as in the first embodiment.

[0053]

As described above, according to the first aspect of the present invention, the DND can be set collectively for the extension telephones belonging to the group. Therefore, when the DND is set for each group, the setting is forgotten. It is possible to prevent even one telephone from being answered.

According to the second aspect of the present invention, it is possible to cancel the DND in group units, and it is possible to prevent a situation in which a contact cannot be made no matter how long due to forgetting to cancel the DND setting.

According to the third and sixth aspects of the present invention, the extension telephones belonging to the group can be automatically and collectively set to the DND.

According to the fourth and fifth aspects of the present invention, it is possible to automatically cancel the DND setting collectively for the extension telephones belonging to the group. It is possible to reliably prevent the light from being stuck.

According to the seventh, eighth, ninth and tenth aspects of the present invention,
When an incoming call arrives at an extension phone in the DND setting group,
It is possible to select and specify in advance whether to return a busy tone to a caller or to transfer an incoming call to a preset extension terminal, and to change the transfer destination extension terminal by setting conditions. Service can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of a private branch exchange according to the present invention.

FIG. 2 is a block diagram showing functions stored in a storage unit shown in FIG. 1 and configured by a program for controlling a control unit.

FIG. 3 is a detailed plan view of the extension telephone shown in FIG. 1;

FIG. 4 is a schematic diagram showing a configuration example of a table stored in a storage unit shown in FIG. 1;

FIG. 5 is a flowchart showing a groove DND setting procedure of the control unit shown in FIG. 1;

FIG. 6 is a flowchart showing a procedure for automatically setting a groove DND by the control unit shown in FIG. 1;

FIG. 7 is a flowchart showing a processing procedure when the control unit shown in FIG. 1 receives an incoming call in a group in which DND is set;

FIG. 8 is a flowchart showing a DND cancellation procedure by a timeout of a group during DND setting of the control unit shown in FIG. 1;

9 is a flowchart showing a procedure for canceling the DND setting in the case where a call is made from an extension telephone of the group during the DND setting of the control unit shown in FIG. 1;

FIG. 10 is a schematic diagram showing a main part of a private branch exchange according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Switch body 2 Control part 3 Storage part 4 Maintenance terminal 5 Announcement machine 6 Relay stand 21-2n Extension telephone 31-3m Outside line 111 Exchange circuit 121-12n, 12p Extension circuit 131-13m Station line circuit 141 Data highway 151 Tone generation Circuit 161 interface

Claims (10)

[Claims] 1. A private branch exchange having a function of setting rejection of a call that does not ring even if a managed extension telephone receives a call. In a private branch exchange, a plurality of arbitrary managed extension telephones are grouped and set. Group setting means to be provided, a call rejection setting request means provided in one or all of the extension telephones, and issuing a request to set a call rejection to all the extension telephones of the group to which the extension telephone belongs; When an incoming call rejection setting request is made, the group setting means is searched to identify all the extension telephones belonging to the group to which the extension telephone that issued the incoming call rejection request belongs, and the incoming call rejection is made to each extension telephone. A private branch exchange comprising a call rejection setting means for setting. 2. A part of or all of the extension telephones are provided with a call rejection release requesting means. When a call rejection release request is made by the call rejection release requesting means, the group setting means is searched to retrieve the call rejection. 2. A call rejection canceling means for specifying all the extension telephones belonging to a group to which the extension telephone having issued the cancellation request belongs and canceling the call rejection setting set for each extension telephone. Private branch exchange as described. 3. When there is an incoming call to an extension telephone belonging to the group, and as a result, there is no answer, a counting means for counting the number of non-response for each group, and the counting means continuously counts the number of times. 2. The private branch exchange according to claim 1, further comprising a call rejection automatic setting means for setting a call rejection to all extension telephones belonging to the corresponding group when the number of non-response exceeds a predetermined value. 4. When an extension telephone to be transmitted is detected from extension telephones belonging to the group for which the incoming call rejection is set,
2. The private branch exchange according to claim 1, further comprising an automatic call rejection canceling means for canceling the call rejection setting of all the extension telephones belonging to the group. 5. When the call rejection setting means sets a call rejection for all the extension telephones belonging to the group, a counting means for starting counting time, and when the counting means counts for a predetermined time, all the belonging to the group are counted. 2. The private branch exchange according to claim 1, further comprising an automatic call rejection canceling means for canceling the call rejection setting of the extension telephone. 6. A time setting means for setting an arbitrary time zone for each group, and an incoming call for setting a call rejection setting to all extension telephones belonging to the corresponding group only in the time zone set in the time setting means. 2. The private branch exchange according to claim 1, further comprising automatic rejection setting means. 7. The private branch exchange according to claim 6, wherein the arbitrary time zone is distinguished between a day mode and a night mode. 8. When an incoming call arrives at an extension telephone belonging to the group for which the incoming call rejection is set, a busy tone is returned to the calling telephone or the incoming call is transferred to a preset extension terminal. Means for designating whether an incoming call is received by an extension telephone belonging to the group in which the call rejection is being set, and returning a busy tone to the calling telephone according to the contents specified by the designating means, or setting an incoming call. 2. A private branch exchange according to claim 1, further comprising a response control unit for transferring the extension to the extension terminal. 9. The operation of the response control means for returning a busy tone to the caller or transferring the busy tone to a predetermined extension terminal is changed according to a preset time zone. 9. The private branch exchange according to claim 8, wherein the extension terminal of the transfer destination is also changed by (1). 10. When an incoming call arrives at an extension telephone belonging to the group in which the incoming call rejection is set, it is determined whether the incoming call is from an extension or an outside line, and a busy tone is returned to the caller based on the distinction. Or a response control means for selecting an extension terminal of a connection destination set in advance according to the distinction and transferring the incoming call to the selected extension terminal. Private branch exchange.