JP3147928B2 - Electronic exchange system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic exchange system in which a system for interlocking with call forwarding is improved.

[0002]

2. Description of the Related Art In recent years, exchanges have been using microprocessors as a control center, and have become increasingly intelligent and sophisticated. By the way, a digital electronic exchange for private branch exchange using a microcomputer is capable of accommodating various functions, in addition to the basic function of accommodating internal and external lines and performing exchange connection between internal lines and between internal and external lines. ing.

[0003] One of them is connection regulation of a call type called ground regulation. This is for free extension connections, for paid public and trunk connections to private networks,
There are various restrictions from the legal or individual systems, and management in order to prevent the use of charged services such as toll calls and international calls from extensions. In general, it is necessary to restrict the use of the originating terminal and the outgoing trunk based on the attributes of the calling terminal, the connection restriction class, and the attributes of the outgoing trunk, the connection restriction class, and dial information. Judgment and connection control are performed.

In addition to ground control, services such as call forwarding, call forwarding, call rejection, etc. can be set for each extension, and various service functions can be used within the set range. it can.

[0005] Generally, the classification of call types and services available for ground control are classified by grade, and the grade is registered for each extension. In the exchange, each extension is authorized based on the registered grade of the extension. The service in the specified range is controlled so that it can be used.

Heretofore, the switching of the service class and the ground control level, which are the above-mentioned service and ground control grades, has been performed in conjunction with the operation mode of the electronic exchange system or by a special number dial from a specific telephone. . In general, two patterns of ground control, service class and ground control level are prepared for each extension telephone, and switching of the service class and ground control level is also limited to these two patterns.

On the other hand, among the service functions, when considering call forwarding, this function is used for a certain extension user for a conference.
Calls arriving at your extension are automatically forwarded to the extension of the conference room.If you set this call forwarding from your extension phone, calls arriving at your extension will remain in the conference until you cancel them. You will receive a call at the room extension,
It is convenient.

However, there are many cases where it is not enough to receive a call. For example, if you need to call urgently,
If the other party is a long-distance call or a foreign party, if the extension of the conference room is not set to a class that allows such a long-distance or foreign call, the call will not be made. Can not be used.

[0009] Since the number of people who use the conference room varies, relaxing the regulations is a management problem.
The switching of the service class and the ground control level is also one of the two patterns prepared in advance, so that it is impossible to finely classify according to various users.

[0010]

As described above, the electronic exchange has various service functions in addition to the exchange operation. Conventionally, these services are provided by setting a class of a regulation level to each extension. The mechanism was such that it could be used within the range of functions allowed in the set class. The class is a maximum of two patterns for each extension, and one of these two patterns is set and used as a special number or the like.

[0011] On the other hand, among the service functions, when considering call forwarding, this function is used by a certain extension user for a conference.
Calls that arrive at your own extension are automatically forwarded to the extension of the conference room. If you set this call forwarding from your extension phone, calls that arrive at your extension will remain in the conference room until you cancel them. This is convenient because it is possible to receive an incoming call at an extension.

However, there are many cases where it is not enough to receive an incoming call. For example, when it is necessary to make an emergency call,
If the other party is an office line or even a toll or foreign caller, the extension of the conference room will be in such a grade that the office or toll or foreign call is permitted. If not set, it cannot be used for calls. Also, even if telephones in a conference room or the like are permitted to automatically send office lines, if only local calls are allowed,
I can't make calls outside the city.

[0013] Since the number of people who use the conference room varies, relaxing the regulations is a management problem.
The switching of the service class and the ground control level is also one of the two patterns prepared in advance, so that it is impossible to finely classify according to various users.

Therefore, the object of the present invention is to
Provided is an electronic exchange system in which, when call forwarding registration for transferring a call arriving at a desired extension to another extension is made, the service to which the desired extension is permitted can be used at the transfer destination extension. Is to do.

[0015]

In order to achieve the above object, the present invention is configured as follows. In other words, among the plurality
In an electronic exchange system that accommodates lines and allows transfer registration to transfer calls arriving at one extension to another extension, the service class that can be set for each extension
The information shown and the services available for that service class
And storage means for storing information indicating the extension of the transfer source extension
After the transfer registration for the transfer destination extension from the terminal
When the service is used at the transfer destination extension,
Available service corresponding to the service class of the source extension
The information indicating the service is referred to from the storage means.
The service at the destination extension based on the
And control means for performing control.

[0016]

[Action] In the above structure, the storage unit setting for each extension
Information indicating the service class that can be set and the service class
Information indicating separately available services is stored and
Transfer registration for the destination extension from the extension terminal of the source extension
The service is used after it is done and at the transfer destination extension
The control means shall correspond to the class of service of the source extension.
Refers to information indicating available services from storage means
Service based on this reference result
Control is performed.

Specifically, when the call forwarding is registered,
The service class of the extension of the transfer destination is switched to the service class of the extension of the transfer source. On the contrary, when the unattended transfer is canceled, the service class of the extension of the transfer destination is restored.

Therefore, according to the present invention, when a call is transferred to another extension to transfer a call arriving at the desired extension to another extension, the service to which the desired extension is permitted is transferred to the extension at the transfer destination. Can be provided.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an outline of an electronic exchange system according to the present invention. In the figure, reference numeral 1 denotes an exchange main body, 2-1 to 2-m are extension telephones, and 3 is a relay stand provided for reception. . 4-1 to 4-m are dedicated lines and private lines, and 5-1 to 5-m are local lines.

The exchange body 1 accommodates extension terminals, office lines, dedicated lines, etc., and performs exchange connection between extensions and between an extension and an outside line. The exchange circuit 11 and the trunk circuits 12-1 to 12-12 are provided. -n,
Line circuits (subscriber circuits) 13-1 to 13-m, control unit (central control unit CC) 14, storage unit 15, interface 1 for relay console
6, consisting of a digital interface circuit 17 and the like.

The switching circuit 11 performs exchange connection between extensions or from an extension to an external line (office line or dedicated line) and from an external line to an extension. The control unit 14 controls the exchange operation of the exchange circuit 11. Initially, it controls the overall various controls.

The storage unit 15 stores various control programs and various tables of the control unit 14 and data such as set function contents. In addition, various information generated in the exchange, such as a call extension, is stored. The storage unit 15 updates and stores various information such as the number information, the call time, the number of calls, the number of calls to an outside line, the telephone number of the call destination, the call time, the call charge, the current state, and the like.
A program for controlling data transmission and reception between the server and the like is held.

The maintenance terminal 6 has a keyboard and a display, and is capable of inputting and changing data and programs, reading data and the like with respect to the exchange body 1. The digital interface circuit 17 is the switch body 1
The maintenance terminal 6 is connected to the control unit 14 via the digital interface circuit 17. The digital interface circuit 17 is an interface capable of high-speed transmission of data and the like.
Is connected to the control unit 14 of the exchange body 1 via the digital interface circuit 17 so that communication with the control unit 14 is possible.

Each of the line circuits 13-1 to 13-m of the exchange body 1 is a connection interface provided for each extension, and serves as a connection interface between the exchange circuit 11 and each extension terminal. The trunk circuits 12-1 to 12-n interface with the switching circuit 11 and the corresponding office lines, leased lines, or private lines 4-1 to 4-m, respectively. This is a circuit that performs loop closing and the like.

The switching circuit 11 is controlled under the control of the control unit 14 so as to form a communication path between the line circuits 13-1 to 13-m and the trunk circuits 12-1 to 12-n. Exchange operation. In addition, although not shown, the tone sending circuit is a switching circuit.
11 and can send out various signal sounds required for the telephone system.

The interface 16 is for connecting the relay console 3 to the exchange body 1 and is one of the terminal control cards, and has a function of transmitting and receiving voice, data, and control signals to and from the relay console 3. ing.

Line circuits 13-1 to 13-m and trunk circuit 12-1
~ 12-n, each terminal control card such as the interface 16 and the control unit 14 perform signal transmission and reception by the control highway 18,
Each terminal control card is assigned to an input / output port, so each port has its own port number decoding means so that the terminal can be specified in the form of a port number that specifies it. When it matches, it is made to recognize as access to self.

The above-mentioned components in the exchange main unit 1 are connected to the control unit 14 via a control highway 18, and the control unit 14 operates in accordance with a control program stored in the storage unit 15 in advance. 13-m and trunk circuits 12-1 to 12-n
And a normal exchange operation is enabled by controlling the communication path between them. In order to realize these controls, the storage unit 15 has programs and data for selecting a partner port number to be exchange-controlled based on dial information and performing various controls based on off-hook and on-hook signals. Have been.

When the system registers a call forwarding that transfers a call arriving at a desired extension to another extension, the system allows the destination extension to use the service permitted by the desired extension. The storage unit 15 has a registration table for that purpose, and the control unit 14 executes a service function that is permitted based on the contents of this table, and executes a service function that is not permitted. Does not perform the function.

In this system having such a configuration, if there is an incoming call from an outside line, the control unit 14 detects the incoming call from the trunk circuits 12-1 to 12-n, and sets the extension terminal (relay terminal system) set as a representative. Or extension group type) or directly to the corresponding extension (PBX dial-in; in the case of receiving a subscriber number from NTT, assigning it to an extension, and dialing the subscriber number directly to receive a call, etc.) Let it.
Then, a communication path is secured by the response of the extension terminal, and communication between the two is enabled. To transfer the incoming call to another extension, the transfer operation is performed from the receiving terminal.

Then, the control unit 14 checks the restriction on the extension of the transfer destination and calls the extension when the connection is possible. When the other party responds, the control unit 14 disconnects the extension terminal that has performed the transfer operation, and the control unit 14 secures a communication path between the transfer destination extension and the calling-side external line to enable the two-way communication.

For a call from the extension to the reception, the control unit
The control unit 14 controls the terminal 3 on the receiving side to receive the call, and if the relay unit 3 responds, the control unit 14 secures a communication path between the calling side and the called side, and performs communication between the two. Enable.

When a call is made from an extension to an outside line, the control unit 14 searches for an empty one of the trunk circuits 12-1 to 12-n by calling operation of the extension terminal, and checks connection restrictions with the calling extension. After that, if connection is possible, a call path is secured using this empty trunk circuit, and dial information is output to the central office. Then, when connected to the other party through the central office, communication becomes possible.

Between extensions, receiving an extension number from a calling extension,
Check the connection regulation between the extensions, and if connection is possible, control the incoming call to the line circuit of the corresponding extension number, secure the communication path by responding to the connection terminal of the line circuit,
Enable communication.

Various controls including transmission / reception control of a trunk circuit, a line circuit, and the like are performed using port numbers. For example, if a certain extension A is assigned to a port number PN n, the extension A When calling, the method of accessing the port number PN n is used. Such control is realized by the control unit 14 controlling based on the terminal-port number information stored in the storage unit 15.

Here, when the system registers an unattended call transfer for transferring a call arriving at a desired extension to another extension, the service to which the desired extension is permitted is used at the transfer destination extension. That we can do,
This control will be described in detail below.

That is, the present system is, for example, a certain extension A
When a user leaves his / her seat and moves to another room for a meeting, etc., the call registered to his / her extension A is transferred to the nearest extension B in the destination room. Once set, the transfer service can be received for the extension B in which the transfer is registered, and the ground restriction level and service class of the extension B (hereinafter referred to as the transfer destination extension) registered as the transfer destination are set to the extension. A (hereinafter referred to as a transfer source extension) is automatically set to a ground control level and a service class, and a user of the extension A can use the transfer destination extension B under the same conditions as when using his own extension. In addition, when the call transfer is released, the extension B of the transfer destination is set so that the ground control level and the service class return to the original settings, and each extension is normally set to the ground control level and the service class range for the extension. In the case where call transfer is set, the call transfer is enabled within the range of the ground restriction level and service class for the transfer source extension where the call transfer is set, thereby providing service to the user. It is.

Therefore, in the present system, the storage unit 15 stores a service class / ground level setting table for each extension number, a service permission / restriction table for each service class, and a call type permission / restriction table for each ground level. A table is prepared, and the control unit 14 is controlled to execute various services according to the ground control level and the service class according to the contents of the table.

FIG. 2 shows a service class / ground control level setting table for each extension number used in the system of the present invention, and FIG. 3 shows a service permission / restriction table for each service class used in the system of the present invention. FIG. 4 is a diagram showing a call type permission / restriction table for each ground restriction level used in the system of the present invention.

The service class / ground control level setting table for each extension number stores an extension number in the extension number section T11.
A service class number part T12 for registering the service class number of the registered extension telephone, a ground restriction level part T13 for registering the ground restriction level of the registered extension telephone, and a service of the transfer source extension telephone. -The number of transfer source telephones by service class for registering the number of transfer source telephones by service class T14 and the number of transfer source extension telephones by ground control level T1
5

In the case of FIG. 2, for example, the extension number "301" indicates that the originally set service class number of this extension is "1" and the ground control level number is "1". The extension number "303" indicates that the originally set service class number of this extension is "3" and the ground control level number is "3".

In the example shown in the figure, there are service classes and ground control levels of "1" to "6". In addition, every time a call forwarding is registered and set, "1" is added to the class corresponding to the class of the transfer source extension for the extension designated (registered) as the transfer destination. This service is used to register the number of service extensions and the number of transfer extensions that have been registered to the destination extension. When operated, the integration registration for the transfer source extension is managed so as to be deleted.

Accordingly, when an extension having a service class of "1" is registered as an extension of "303", the extension of "303" is assigned an extension of "1" of the transfer source telephone number T14 of each service class. When "1" is added to the term and registered, and the term is canceled, the value of the term where the class of the transfer source telephone number unit T14 by service class is "1" is decremented by "1". In this way, the number of source extensions for each of the classes "1" to "6" for each destination extension is registered for each class. Also,
With the same concept, the number of transfer source telephones by ground control level is also registered and managed for each transfer destination extension for each of the ground control level classes "1" to "6". Such management is performed by the control unit 14.

The service permission / restriction table for each service class in FIG. 3 includes a service class number T21 and a permission / restriction flag T22. In this table, service contents are registered for each service class number. As shown in the service name section, the service contents are "automatic line transmission",
There are services such as "dedicated line connection", "abbreviated dialing", "busy transfer", "call forwarding", "response delay transfer", "camp-on", and "call rejection".
It is a table in which the usable range is determined according to the class of the visclass.

In this table example, when the service class (grade) is "1", all the above-mentioned services are available, but in the service class "3", "fixed speed dial" and "busy" are used. Forwarding, Call Forward All, Delayed Answering, and Rejected Calls are available, but "Automatic Office Line", "Dedicated Line Connection", and "Camping On" are not available. . Neither of these services can be used in the service class “0”.

The call type / permission / restriction table for each ground restriction level in FIG. 4 includes a ground restriction level number T31 and a permission / restriction flag T32. This table registers the contents of call types that can be used for each ground control level number, and the contents of the call types are, as shown in the section of the call type name, "inter-city (inter-city call)" and "local". (Local call), "International dial (international automatic immediate call; international dial call)", "international (international operator call)", "time signal (time signal service (117
Number))), weather (weather information (number 177)), firefighting (11
No. 9) "and" Police (110) ", etc., and these are tables that define the usable range for each ground control level number (grade).

In this table example, when the ground control level number (grade) is "1", all of the above call types are available.
"Time signal", "Weather", "Firefighting", and "Police" are available, but "Tokyo", "International immediate", and "International" are not available. Neither of these call types can be used with the ground control level number “0”.

The service class / ground control level setting table for each extension number and the service permission / restriction table for each service class are linked by service class number T12 and service class number T21.

The service class / ground control level setting table by extension number and the call type / permission / restriction table by ground control level are linked by the ground control level number T13 and the ground control level number T31.

The service permission / restriction table for each service class corresponds to the service class number T21, and the service permitted / restricted by the service class number T21 is represented by a permission / restriction flag T22. The data is set when the station is opened, and is not updated except for the data setting.

The call type / permission / restriction table for each ground control level is represented by a permission / restriction flag T32 indicating a call type permitted / restricted by the ground control level number T31 corresponding to the ground control level number T31. Data is set at the time of opening, and is not updated except for data setting.

In the service class / ground control level setting table for each extension number, the service class number T12 and the ground control level number T13 of the extension telephone are determined corresponding to the extension number T11 by data setting. When call forwarding is not set, the number of source telephones T14 by service class and the number of source telephones T15 by ground control level are all zero.

Here, the extension telephone (extension number "301") having "1" as the service class number T12 and "1" as the ground control level number T13 is assigned the service class number T1.
Extension phone with "3" as 2 (extension number "303")
When the call forwarding is registered in the service class number 1 of the number T14 of transfer source telephones by service class corresponding to the extension number T11 (extension number "303") of the service class / extension control level setting table by extension number. Th area (service
(The position of "1" as the service class number), the first area of the ground control level number of the number of source telephones T15 by ground control level and the position (the position of 1 as the ground control level number)
Changes from “0” to “1”.

In this state, the extension telephone (extension number "303")
)), The control unit 14 captures this and recognizes that the extension "303" has been called. When dialing from extension "303", the dial information is transmitted to the control unit. Sent to 14.

When the extension "303" is called, the control unit 14 refers to the service class / ground control level setting table for each extension number in the storage unit 15, and refers to the extension registered in the extension number unit T11. The service class number "3" of No. 303 is obtained from the service class number part T12, and the ground control level number "3" of the extension "303" is obtained from the ground control level number part T13. Then, the service type is recognized from the dial information, and the service permission /
Referring to the regulation table, the service class number part T21
Check if the service is acceptable.

According to this table, the service class number "3" is a service for which only "fixed speed dial", "busy transfer", "call forwarding", "response delay transfer" and "call rejection" are permitted. It is a screw.

Accordingly, the control unit 14 determines whether or not the service to be used by the extension "303" recognized from the dial information is restricted, and as a result, the service to be used is restricted. If not, if an outgoing call is made based on the dial information, a vacant trunk circuit is searched for, the vacant trunk circuit is connected to the line circuit of extension "303" via the switching circuit 11, and the dial information is transmitted to the outside line. Then, if the other party answers, the telephone of extension "303" can talk to the other party.

On the other hand, if the service to be used is restricted, the control unit 14 sets the service class /
The contents of the transfer source telephone number unit T14 for each service class in the ground control level setting table are checked, and if the contents are not zero, the corresponding service class number is used to obtain the service class number from the service permission / restriction table for each service class. Check whether the service is possible.

Further, when the service is originating from the local line, it is checked from the call type / permission / restriction table by ground control level whether or not the call type is permitted in the ground control level number part T31.

If the number is restricted, the number of transfer source telephones T15 by ground control level in the service class / ground control level setting table by extension number is checked, and the content of the number of source telephones T15 by ground control level is not zero. In this case, the corresponding ground control level number is
A check is made from the allowance / restriction table to see if the service is possible.

That is, when the service to be used is restricted, the control unit 14 firstly stores the contents of the transfer source telephone number unit T14 for each service class in the service class / extension control level setting table for each extension number. Find out.

This part is a table in which the extension assigned to which service class is registered as a transfer source telephone, and the number of the telephones is counted for each transfer destination extension. If "2" is registered in the class "1" of the transfer source telephone number unit T14 by service class, it indicates that the extension of the service class "1" is registered as the "2" transfer source extension. .

Accordingly, since the content of the service class "1" is other than zero, in this case, the service class "1"
Using the service class number corresponding to the service index as an index, whether the service to be used is permitted in the class of the service class from the "service permission / restriction table by service class" in FIG. Find out what. And
If so, the service you are trying to use
The control unit 14 executes the service.

However, if the service is originating from the local line, the control unit 14 then transfers the number of source telephone units T15 by ground level to the service class / ground level level table in FIG. To see if there is a non-zero restriction level for the number of source telephones by ground restriction level of the destination extension used for calling, and if there is a non-zero restriction level, the highest class restriction Level (in the example of the figure, class “1” is the highest order, class “6” is the lowest order; however, the order may be determined in a desired order according to the operation mode of the system). The call type / permission / restriction table by ground control level in FIG. 4 is referred to as a key. From this table, the permitted call type by class registered in the ground control level number part T31 indicates the call type to be used. Whether or not Find out. If permitted, the service to be used is transmitted to the control unit 14.
Will execute. If it is regulated, the control unit 14 controls to generate a prescribed regulation sound, sends it to the calling extension telephone,
Inform the caller that the service is not available.

When the call forwarding is canceled, the control unit 14 transfers the number T14 of source telephones by service class corresponding to the extension number T11 of the destination extension telephone in the service class / ground control level setting table by extension number. Service class contents of original telephones and the number of source telephones by ground level
The content of the ground control level corresponding to the ground control level of the transfer source telephone at T15 is reduced by "1". As a result, the service class and the ground control level of the transfer source extension telephone are removed from the transfer destination extension telephone.

In other words, the release of the call forwarding is performed, for example, by dialing a special number for the release from the extension (transfer source extension telephone) for which the call forwarding is set. Cancel the call forwarding registration.

The control unit 14 further provides a service for each extension number.
The transfer source in the number of transfer source telephones by service class corresponding to the extension (extension "303" in the above example) registered as the transfer destination extension at the extension number T11 of the transfer destination extension telephone in the service class / grounding level setting table The value of the number of registered telephones of the same class as the service class of the telephone (extension "301" in the above example) and the number of source telephones (extension "301") in the section of the number of source telephones T15 by ground control level The value of the number of registered telephones of the same class as the ground control level class is reduced by “1”. This allows
The service class and ground level of the source extension are removed from the destination extension.

Therefore, the number of registered telephones corresponding to each class in the item of the number of source telephones T14 per service class of the destination extension (extension "303") and the number of source telephones T15 by ground control level are equal. If any of the above becomes zero, only the service of the original service class and ground control level of the extension of the transfer destination (extension "303") can be used. In addition, the number of registered telephones corresponding to each class in the item of the number of source telephones T14 by service class and the number of source telephones by ground level T15 of the destination extension (extension "303") are either However, if there is a service having a non-zero value, the service class permitted by the highest class and the service of the ground control level among the classes having the non-zero value are the extension of the transfer destination (extension “303”). No.)
It can be used with.

As described above, when the system registers the call forwarding, the service class, for example, the service class and the ground restriction level of the extension of the transfer destination are changed to the service class and the ground restriction of the transfer source extension. If you switch to the level and cancel Call Forwarding on the contrary,
By reverting the service class and ground control level to the original level, the transfer destination extension can receive the same service as the transfer source extension. The service can be used within the service range for which the service has been permitted.

Therefore, in the case of an extension at a place where various people use, such as a conference room, it is possible to provide a service beyond the regulation while providing a necessary regulation in some users. Thus, the usability can be dramatically improved. The above operation example will be described with reference to FIGS. 5 and 6 focusing on the exchange control operation.

FIG. 5 shows the switching circuit 11, the control unit 14, and the storage unit.
The figure shows the constituent parts centered at 15, where A1 and A2 are internal lines, and B1 and B2 are external lines. FIG. 6 shows the functional elements of the control unit 14 and the storage unit 15 necessary for realizing the central idea of the present invention, and the explanation will be focused on these.

The extension telephone (extension number "301") of extension A1 having service class number T12 of "1" and ground control level number T13 of "1" is service class number T12.
Extension A2 with extension "3" (extension "30
3)), when the call forwarding is registered by a special number dialing operation or the like, the control unit 14 performs a table rewriting control on the storage unit 15, and the service class / ground control level setting table for each extension number shown in FIG. The first area of the service class number (the position of "1" as the service class number) of the number of transfer source telephones T14 by service class corresponding to the extension number T11 (extension number "303") and the ground control level 1 of the ground control level number of the number of other transfer source telephones T15
Area and (the position of 1 as the ground control level number)
Is rewritten from “0” to “1”.

At the same time, the control unit 14 also registers in the absence transfer registration table of the storage unit 15 that the extension number "301" has set the extension number "303" as the transfer destination, whereby the extension transfer registration is completed. Complete. The absence transfer registration table is as shown in FIG. 7, and it is possible to register the presence / absence of the absence transfer registration and the extension of the transfer destination for each extension. When no call forwarding is registered, the entry of presence / absence forwarding registration becomes "Call forwarding registered", and the extension of the forwarding destination entered after the special number dial is registered in the extension of forwarding destination Is done.

For this reason, if there is an incoming call at the extension, it is first checked in the call forwarding registration table whether the call destination extension is registered for call forwarding. When the call is forwarded to the destination extension, and the call forwarding is registered, it is possible to control the call to the registered destination.

Therefore, when an incoming call arrives at extension "301" after the absence transfer registration state, the control unit 14 refers to the absence transfer registration table of the storage unit 15 and the extension "301". There sure and Turkey have been absent transfer registered with the extension "303" number, extension "30, which is the transfer destination
Control is performed so that the call is received at the 3 ″ number.

When a call is made from the extension telephone (extension number "303"), the control section 14 captures the call and recognizes that extension "303" has been called. When a dial call is made from extension "303", the dial information is transmitted to the control unit 14.
The digit information of the dialed number is analyzed by the digit analyzer 14a.

When the extension "303" is called, the control unit 14 refers to the service class / extension control level setting table for each extension number in the storage unit 15 and refers to the extension "registered in the extension number unit T11". The service class number "3" of No. 303 is obtained from the service class number part T12, and the ground control level number "3" of the extension "303" is obtained from the ground control level number part T13.

The control unit 14 recognizes the service type based on the dial information analyzed by the digit analysis unit 14a.
Referring to the service permission / restriction table for each service class, it is checked whether the service is permitted in the service class number part T21.

According to this table, the service class number "3" is a service in which only "fixed speed dial", "busy transfer", "call forwarding", "delayed response transfer" and "call rejection" are permitted. It is a screw.

Accordingly, the control unit 14 determines from the checked contents and the dial information whether or not the service to be used by the recognized extension "303" is restricted by the restriction check unit 14b. As a result, if the service to be used is not regulated, if an outgoing call is made based on the dialing information, a vacant trunk circuit is searched and this vacant trunk circuit is switched via the switching circuit 11 to the line circuit of extension "303". And send the dial information to the outside line. Then, if the other party answers, the telephone of extension "303" can talk to the other party.

On the other hand, if the service to be used is restricted, the control unit 14 checks the restriction check unit 14b to determine the service class for each extension number and the transfer source telephone for each service class in the ground restriction level setting table. The contents of the number unit T14 are checked, and if the contents are not zero, the service class number corresponding to the corresponding service class number is used to determine whether or not the service is permitted.
Check whether the service is possible from the restriction table.

Further, when the service is originating from the local line, it is checked from the call type / permission / restriction table classified by ground control level whether or not the call type is permitted in the ground control level number part T31.

If the number of transfer source telephones by ground control level 15 in the service class / ground control level setting table by extension number is checked, the contents of the number of transfer source telephones T15 by ground control level are not zero. In this case, whether or not the service is possible is checked from the call type / permission / restriction table classified by ground control level using the corresponding ground control level number.

That is, when the service to be used is regulated, the control unit 14 controls the regulation check unit 14b.
First, the contents of the service class-specific transfer source telephone number unit T14 in the service class / ground control level setting table for each extension number are checked.

This part is a table in which extensions assigned to which service classes are registered as transfer source telephones, and the number of the telephones is totaled for each transfer destination extension. If "2" is registered in the class "1" of the transfer source telephone number unit T14 by service class, it indicates that the extension of the service class "1" is registered as the "2" transfer source extension. .

Therefore, since the content of the service class "1" is other than zero, in this case, the service class "1"
Using the service class number corresponding to the service index as an index, the service class to be used in the class of the service class from the service permission / restriction table for each service class in FIG.
Check if the service is authorized. If permitted, the control unit 14 executes the service to be used.

However, if the service is originating from the local line, the control unit 14 then transfers the number of source telephone units T15 by ground level to the service class / ground level level setting table shown in FIG. To see if there is a non-zero restriction level for the number of source telephones by ground restriction level of the destination extension used for calling, and if there is a non-zero restriction level, the highest class restriction Level (in the example of the figure, class “1” is the highest order, class “6” is the lowest order; however, the order may be determined in a desired order according to the operation mode of the system). The call type / permission / restriction table by ground control level in FIG. 4 is referred to as a key. From this table, the permitted call type by class registered in the ground control level number part T31 indicates the call type to be used. Whether or not Find out. If permitted, the service to be used is transmitted to the control unit 14.
Will execute. If it is regulated, the control unit 14 controls to generate a prescribed regulation sound, sends it to the calling extension telephone,
Inform the caller that the service is not available.

When the call forwarding is canceled, the control unit 14 transfers the number of transfer source telephones T14 by service class corresponding to the extension number T11 of the transfer destination extension telephone in the service class / ground control level setting table by extension number. Service class contents of original telephones and the number of source telephones by ground level
The content of the ground control level corresponding to the ground control level of the transfer source telephone at T15 is reduced by "1". As a result, the service class and the ground control level of the transfer source extension telephone are removed from the transfer destination extension telephone.

More specifically, the release of the call forwarding is performed by, for example, dialing a special number for releasing the extension (transfer source extension telephone) from the extension for which the call forwarding is set. Cancel the call forwarding registration.

The control unit 14 further provides a service for each extension number.
The transfer source in the number of transfer source telephones by service class corresponding to the extension (extension "303" in the above example) registered as the transfer destination extension at the extension number T11 of the transfer destination extension telephone in the service class / grounding restriction level setting table The value of the number of registered telephones of the same class as the service class of the telephone (extension “301” in the above example) and the number of source telephones (extension “301”) in the section of the number of source telephones T15 by ground control level The value of the number of registered telephones of the same class as the ground control level class is reduced by “1”. This allows
The service class and ground level of the source extension are removed from the destination extension.

Therefore, the number of registered telephones corresponding to each class in the item of the number of source telephones T14 per service class and the number of source telephones T15 by ground control level of the destination extension (extension "303") are the same. If any of the above becomes zero, only the service of the original service class and ground control level of the extension of the transfer destination (extension "303") can be used. In addition, the number of registered telephones corresponding to each class in the item of the number of source telephones T14 by service class of the extension of the transfer destination (extension “303”) and the number of telephones of source T15 by ground control level are either However, if there is a service having a non-zero value, among the classes having the non-zero value, the service class permitted by the highest class and the service at the ground control level are transferred to the transfer destination extension (extension “303”). No.)
It can be used with.

As described above, at the time of registering the call forwarding, the present system changes the service class, for example, the service class and the ground restriction level of the extension of the transfer destination to the service class and the ground of the transfer source extension. If the call is switched to the restriction level and the call forwarding is canceled, the service class and ground control level of the extension of the transfer destination are restored to the original level, so that the extension of the transfer destination also has the same service as the extension of the transfer source. Can be received, and at the transfer destination extension,
The user of the transfer source extension can use the service within the service range for which the user has been permitted.

[0093] For this reason, it is possible to provide services that exceed the restrictions, depending on the user, while normally restricting the extension required in places such as conference rooms used by various people. As a result, usability can be dramatically improved. The present invention is not limited to the embodiments described above and shown in the drawings, and it is needless to say that the present invention can be appropriately modified and implemented without departing from the scope of the invention.

[0094]

As described above in detail, according to the present invention, when a call is transferred to another extension to transfer a call arriving at a desired extension to another extension, the extension at the transfer destination is granted permission for the desired extension. Services that can be used at your own extension, such as when you move to a meeting room in a conference, etc. In addition to this, it is possible to release the service of the extension to which the call is forwarded by canceling the call forwarding, and to improve the usability while maintaining the regulation. An exchange system can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram of an electronic exchange system according to an embodiment of the present invention.

FIG. 2 is a diagram showing an example of a service class / ground control level setting table for each extension number used in the system of the present invention.

FIG. 3 is a diagram showing an example of a service class-based permission / restriction table used in the system of the present invention.

FIG. 4 is a diagram showing an example of a call type permission / restriction table for each ground restriction level used in the system of the present invention.

FIG. 5 is a block diagram showing a main configuration of the system of the present invention.

FIG. 6 is a diagram for explaining an operation example of a main part of the system of the present invention.

FIG. 7 is a diagram showing an example of a call forwarding registration table.

[Explanation of symbols]

1: Switch body, 2-1 to 2-m, A1, A2: Extension terminal, 3
... Intermediate stand, 4-1, ~ 4-m ... Dedicated line, etc., 5-1, ~ 5-m ... Office line, 11 ... Switching circuit, 12-1, ... 12-n, B1, B2 ... Trunk circuit, 13-1, to 13-m: a line circuit, 14: a control unit, 14a: a numerical analysis unit, 14b: a regulation check unit, 15: a storage unit.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04M 3/42-3/58 H04Q 3/58-3/62

Claims (3)

(57) [Claims] A transfer registration for accommodating a plurality of extensions and transferring a call arriving at one extension to another extension is provided.
In a possible electronic exchange system, information indicating the class of service that can be set for each extension,
Contains information indicating the services available for each service class.
And 憶storing means, transfer registration for destination extension from the source extension of the extension terminal
Service is used after the call is made and at the destination extension
The service class of the source extension.
From the storage means.
Based on the reference result, and
An electronic exchange system comprising: control means for controlling services . 2. A transfer registration for accommodating a plurality of extensions and transferring a call arriving at one extension to another extension.
In a possible electronic exchange system, information indicating the class of service that can be set for each extension,
Stores information indicating available services by service class
Storage means for the transfer registration for destination extension from the source extension of the extension terminal
Service is used after the call is made and at the destination extension
The service class of the source extension.
From the storage means.
Based on the reference result, and
Service related control and the transfer source extension
Release of transfer registration from the extension terminal to the transfer destination extension
The service class of the extension of the transfer destination to the original
An electronic exchange system comprising control means for returning to a service class . 3. The control unit according to claim 2, wherein the transfer registration is performed from a plurality of extensions.
Multiple extensions and transfers registered for transfer
Each service class is referenced from the storage means,
Based on the reference result, the service class of the extension
Switch to an extension service class where good service is allowed
3. The electronic exchange system according to claim 1 , wherein the electronic exchange system is replaced.