JP3048731B2 - Communications system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a modification of a program for a subscriber terminal in a communication network.

[0002]

2. Description of the Related Art Conventionally, in a communication network such as an ISDN system, when a contracted subscriber implements a new service, an I interface terminal corresponding to the service has been installed. In this way, the subscriber could receive any service provided by the network. In addition, in a subscriber terminal capable of expanding the function of a call processing program by adding a program storage medium such as an IC card, a service provided by a network can be received by obtaining a new IC card or the like. .

[0003]

In the above conventional method,
When a subscriber implements a new service, an existing I-interface terminal cannot transmit or analyze a new signal used in the service, and it is necessary to newly install an I-interface terminal corresponding to the service. In some cases, it became necessary to obtain an IC card or the like. The IC card contains a program for modification (which means rewriting the whole program, changing a part, adding a part, or adding a program corresponding to a new service). ing.

[0004] For example, a subscriber terminal that supports only normal call origination / reception cannot implement additional services such as call waiting and call transfer services. An additional service IC card is required.

[0005] However, in this method, every time a new service (with a new signaling procedure) is introduced, the subscriber terminal must be replaced or a program storage medium must be obtained, which imposes a burden on the subscriber. ing. In addition, from the standpoint of the network operator providing the service, when introducing a new service, it is necessary to consider a signaling procedure that does not affect the existing subscriber terminal (existing signaling system) as much as possible. There was a possibility that adding services would be difficult.

For example, once a network has been assigned a feature key number in a supplementary service, a different number is assigned to subscriber terminals and IC cards designed based on that number in a large quantity. It is thought that it is difficult to change it.

The present invention reduces the necessity of installing a new subscriber terminal and obtaining a program storage medium as described above, and makes it possible to provide subscribers and network operators with the flexibility of adding services.

[0008]

In order to achieve the above object, a program held by a subscriber terminal is provided to a subscriber terminal which can be modified through a communication line, and a subscriber terminal.
A function of modifying a subscriber terminal having a center that manages a plurality of programs, an exchange that connects the subscriber terminal to the center, and a management device that retains data relating to the service being provided, which differs for each subscriber terminal. In a communication system to be performed, when a subscriber terminal requests a service modification to a center via an exchange, the center checks whether or not the service registration state of the subscriber terminal matches the service that can be provided, and executes the service. When making a correction, an instruction to rewrite data relating to the subscriber terminal is sent to the management device, a program corresponding to the service is transferred to the subscriber terminal via the exchange, and the subscriber terminal executes the program. It is to be corrected.

[0009]

In the communication network, when a subscriber terminal requests service modification to the center via the exchange, the center confirms whether the service registration state of the subscriber terminal matches the service that can be provided, When the service is modified, an instruction to rewrite data relating to the subscriber terminal is sent to the management device, a program corresponding to the service is transferred to the subscriber terminal via the exchange, and the subscriber terminal Modify the program.

[0010]

FIG. 1 shows an embodiment of the present invention. FIG. 1 shows an ISDN terminal and an ISD which are basic components of the present invention.
It shows the relationship between the N subscriber line exchange and the program management center for subscriber terminals. FIG. 2 shows a sequence in the present embodiment.

The operation of this embodiment will be described below with reference to the drawings. FIG. 1 shows a state in which an ISDN terminal 1 is connected to a subscriber line exchange 2 and the exchange 2 is connected to a call processing program management center 3 for subscriber terminals. In this embodiment, the local exchange 2 also serves as a service-permitted data management node, but this may be different.

FIG. 2 shows a signal procedure performed between the ISDN terminal 1, the subscriber line exchange 2, and the terminal call processing program management center 3.

When a subscriber attempts to register a new service, the subscriber operates the terminal 1 to transmit a "call setting" signal 4a to the exchange 2. The called number information element of this signal indicates a special number for service registration. Further, the service name to be registered and its attribute are included in a service registration information element which is a new parameter.

Upon receiving this signal, the exchange 2 recognizes that the service registration procedure has been started from the called number information element, checks the consistency with the data in the exchange 2 and determines whether the service is permitted. "Call setting acceptance" signal 4
b, and sends a data request signal 5a to the center 3. This signal includes a "call setting" signal 4a.
Also contains the contents of the service registration information element included in.
Also, if desired, data about the subscriber can be included in this signal.

Upon receiving this signal, the center 3 obtains a corresponding terminal call processing program from data such as a service name and a service attribute. Then, a data request acceptance signal 5b is transmitted to the exchange 2. Upon receiving this signal, the exchange 2 connects the communication path and transmits a "response" signal 4c to the terminal 1.

Thereafter, the terminal program data notification 5
c is performed from the center 3 to the terminal 1 in-channel. The data transfer protocol and the data format at this time are determined in advance between the subscriber and the network. When the data transfer is completed, the center 3 transmits a data end 5d to the exchange 2.
When the exchange 2 receives this signal, it transmits a data end confirmation 5e to the center 3, determines that the above procedure has been successful, and rewrites the service permission data for the subscriber. At the same time, the communication path is disconnected again, and a “release” signal 4d is transmitted to the terminal 1. As described above, the service registration of the subscriber and the transfer of the terminal call processing program are performed.

Next, an embodiment of the terminal according to the present invention will be described with reference to FIGS. FIG. 3 shows the appearance of the terminal. FIG. 4 shows a configuration diagram of the terminal.

As shown in FIG. 3, the service name corresponding to the function button 1c is displayed on the display 1b of the terminal 1, and the service that the terminal can currently provide can be displayed. When it is desired to register a service having more than the number of function buttons, a method of providing a shift key to increase the number of services, a method of displaying a service list on a display, and the like can be considered.

When the subscriber changes the service registration state, the service state registered in the network is stored in the terminal 1 after the procedure shown in FIG. 2 is completed, and the newly registered service name is stored in the function button. Given.

The terminal 1 has an IC card drive 1e so that an IC card can be inserted. When the IC card is inserted or when the subscriber requests the terminal to activate the IC card service, the terminal 1 checks in the service menu of the IC card whether there is a service that the subscriber has not registered in the network. If so, show subscribers a list of those services,
Ask each one if you want to register on the net. At this time, for reference of the subscriber's judgment, a list of services currently registered, their contract fees, and a contract fee for a service candidate to be registered this time may be collected from the network and shown to the subscriber. When the subscriber inputs a determination as to whether or not to register to the terminal 1, then the terminal 1 and the network check the version of the terminal call processing program. At this time, if it is confirmed that the version numbers are the same, the service is registered in the terminal 1 and the network in the same manner as in the service registration procedure.

Next, the procedure for checking the service registration status by starting the terminal will be described with reference to FIGS. FIG. 5 shows a sequence of the check procedure. FIG. 6 shows the contents of the service status table transferred at the time of the check. FIG. 7 shows a service status collation result table transferred as a check result.

In FIG. 5, when the subscriber checks the service status of the terminal, the subscriber presses a function button 1c for "check service status" of the terminal 1. Terminal 1
In step c, when it is detected that the button has been pressed, the service state stored in the storage circuit 1f is edited in the form of the service state table 8 in FIG.

This table shows, for each call processing service, service status such as service name, program version number, characteristic values (program size, instruction code appearance distribution, etc.) indicating program contents, and service attributes (contract parameters). The indicated data is displayed.

If necessary, a contract date and time, a contract number, a program download date and time, a download number and a terminal number may be included.

Further, information on programs and data commonly used between services may be displayed.

Then, the terminal 1 transmits an "additional information" signal 6a containing the contents of this table as a parameter to the network.

When the exchange 2 receives this signal 6a,
Judge that the service status check has been started from the terminal,
After checking the service status in the exchange,
Transmits a "state collation" signal 7a. The parameters of this signal indicate the content of the received "additional information" signal 6a. If necessary, the attribute data of the subscriber (such as a telephone number) may be included in the parameter.

When the center 3 receives this signal 7a, it checks the service status of the terminal indicated in the received signal with the service status managed by the center. Then, the service collation result 9 shown in FIG. 7 is created. In the overall collation result column, “OK” is written when all items match, and “NG” is written when even one item does not match.

When the overall collation result is NG, the collation result for each service is described. When the verification result of a certain service is NG, the reason for the NG (version mismatch, program size mismatch, service non-contract, service attribute mismatch, etc.) is described in the NG reason column. The center 3 outputs a "status collation result" signal 7b containing the contents of this table as a parameter.
To the exchange 2.

The exchange 2 edits an "additional information" signal 6b containing the contents of the parameters of the signal 7b and transmits it to the terminal 1.

The above is the case where the subscriber activates the service status check. In addition, when the terminal detects an abnormality during the call processing procedure (for example, when the terminal receives an unexpected signal or parameter, The terminal may start the service state check procedure when an expected signal or parameter is not transmitted or when these abnormalities are repeated many times. At that time, the terminal 1 obtains the state comparison result in the same manner as described above.

Based on the result of the service status check, the terminal 1 can check the consistency of the service status and determine whether or not it is necessary to reload the program. If the verification result of a service is NG, the program for the service is usually reloaded. The procedure is the same as that in FIG. 2, except that the service attribute value is “reloading”.

When the NG reason is "service not contracted", a procedure for deleting the program on the terminal is performed. If the NG reason is "service attribute mismatch", the judgment is made based on the data to be added. At this time, the data on the terminal 1 is rewritten based on the correct service attribute value sent at the same time.

Next, FIG. 8 shows a procedure for checking the service registration status by starting the network. FIG. 8 shows a sequence of the check procedure.

In FIG. 8, when the network checks the service registration status of the terminal, the exchange 2 sends an "additional information" signal 10a for inquiring the service registration status to the subscriber.
Send

When receiving the signal 10a, the terminal 1 edits the service status stored in the storage circuit 1f into a service status table 8 shown in FIG. The contents of the service status table 8 may be the same as those in the check procedure from the terminal side. The terminal returns "additional information" 10b including the contents of this table as a parameter to the exchange 2.

The exchange 2 having received the signal 10b transmits the service state of the terminal to the center 3 in the form of a state collation signal 11a in the same manner as the check procedure from the terminal side. When receiving the signal 11a, the center 3 collates the service state of the terminal with the service state of the network, and transmits the result to the exchange 2 as a state collation result signal 11b. Upon receiving the signal 11b, the exchange 2 transmits the content to the terminal 1 as an "additional information" signal 10c.

As described above, according to the present invention, a terminal for a new service can be provided without installing a new terminal for a new service or obtaining a new IC card storing a terminal program. Can be used for the user, and the convenience of the user is improved.

Also, since the service registration status is confirmed, it is not necessary to perform the registration work for all terminals, so that the data transfer amount can be reduced.

In the present invention, a program held by a subscriber terminal is provided to a group of subscriber terminals which can be modified through a communication line, and to the subscriber terminal.
A function of modifying a subscriber terminal having a center that manages a plurality of programs, an exchange that connects the subscriber terminal to the center, and a management device that retains data relating to the service being provided, which differs for each subscriber terminal. In a communication system in which any one of the subscriber terminals in the group or one of the pre-designated subscriber terminals requests a service modification to the center via the exchange, the center transmits all the subscribers in the group. Check whether the service registration state of the terminal matches the service that can be provided, and when modifying the service, check the management device for all the subscriber terminals for which data rewriting has been determined to be necessary within the group. Sends an instruction to rewrite data, and sends a program corresponding to the service via a switchboard to a program in the group. Transferred to all subscriber terminals rewriting grams is determined necessary, the subscriber terminal in the group, it is also possible to modify the program.

As a group, there is a group having a personal computer terminal and a telephone connected to a communication line. And
The function of the telephone can be modified by the instruction of the personal computer terminal.

A group of subscriber terminals capable of modifying a program held by the subscriber terminal through a communication line, a center for providing a plurality of programs to the subscriber terminal and managing a plurality of programs, In a communication system for modifying the function of a subscriber terminal, comprising: an exchange connecting the terminal and the center; and a management device, which differs for each subscriber terminal and retains data relating to the service being provided, any one of the subscribers in the group When a subscriber terminal or one pre-designated subscriber terminal requests a service modification to the center via the exchange, the center commonly uses the group as a change target in the group.
Configured subscriber terminals held to provide services
Contract with the subscriber terminal for the program to be
Program for Providing Provided Available Services
DOO confirms whether the match, when modifying a service, transmits an instruction to rewrite all the data relating to the subscriber terminal rewriting of data is determined to require in the group to the management apparatus, the The program corresponding to the service may be transferred to all the subscriber terminals that need to be rewritten in the group via the exchange, and the subscriber terminals in the group may modify the program.

As a group, there is a group having a personal computer terminal and a telephone connected to a communication line. And
The telephone whose function is to be modified can be set in advance by the instruction of the personal computer terminal for each group.

Also, a group of subscriber terminals capable of modifying a program held by the subscriber terminal through a communication line, a center for providing a plurality of programs to the subscriber terminal and managing a plurality of programs, In a communication system for modifying the function of a subscriber terminal, comprising: an exchange connecting the terminal and the center; and a management device, which differs for each subscriber terminal and retains data relating to the service being provided, any one of the subscribers in the group When a subscriber terminal or one pre-designated subscriber terminal requests a service modification to the center via an exchange, the center establishes a subscriber individually set as a change target within the group.
The program that the terminal holds to provide the service
Can be provided in advance for the subscriber terminal
Check whether the program matches the program for providing the appropriate service, and when modifying the service, the management device is required to update the data on all the subscriber terminals determined to require data rewriting within the group. A rewriting instruction is transmitted, and a program corresponding to the service is transferred to all the subscriber terminals determined to require rewriting of the program in the group via the exchange, and the subscriber terminals in the group receive the program. May be modified.

As a group, there is a group having a personal computer terminal and a telephone connected to a communication line. And
A telephone whose function is to be modified can be preset for each telephone in each group.

A group of subscriber terminals capable of modifying a program held by the subscriber terminal through a communication line, a center for providing a plurality of programs to the subscriber terminal and managing a plurality of programs, In a communication system for modifying the function of a subscriber terminal, comprising: an exchange connecting the terminal and the center; and a management device, which differs for each subscriber terminal and retains data relating to the service being provided, any one of the subscribers in the group When a subscriber terminal or one pre-designated subscriber terminal requests service modification to the center via the exchange, the center establishes a subscriber to be changed designated by the subscriber terminal that has made the modification request in the group. Check if the service registration status of the device matches the service that can be provided. Sends an instruction to rewrite data for all subscriber terminals for which it is determined that data rewriting is necessary within the group, and rewrites the program corresponding to the service via the exchange. The transfer may be made to all the subscriber terminals determined to be necessary, and the subscriber terminals in the group may modify the program.

As a group, there is a group having a personal computer terminal and a telephone connected to a communication line. And
The personal computer terminal can set the telephone whose function is to be modified each time a modification request is issued.

In the above communication system for modifying the function of the subscriber terminal, the center determines whether or not the service registration state of the subscriber terminal in the group matches the service that can be provided. The service registration status of all the subscriber terminals, the service registration status of the subscriber terminal to be changed for each group in the group, the subscriber terminal to be changed for each subscriber terminal in the group Service registration status of the subscriber terminal in the group, which is specified by the subscriber terminal that has made the above-mentioned correction request, and determines whether at least one of the service registration statuses of the service registration status of the subscriber terminal to be changed matches the service. It may be confirmed.

[0049]

According to the present invention, it is possible to reduce the necessity of installing a new subscriber terminal and obtaining a program storage medium, and to provide the subscriber and the network operator with the flexibility of adding a service.

[Brief description of the drawings]

FIG. 1 is a block diagram of one embodiment of the present invention.

FIG. 2 is a sequence diagram of a service registration procedure.

FIG. 3 is an external view of a terminal according to the present invention.

FIG. 4 is a block diagram of a terminal.

FIG. 5 is a sequence diagram of a service check procedure started by the terminal side.

FIG. 6 is an explanatory diagram of a service status table.

FIG. 7 is an explanatory diagram of a service collation result.

FIG. 8 is a sequence diagram of a service check procedure initiated by a network.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... ISDN terminal which implements this invention 1a ... Handset 1b ... Display 1c ... Function button 1d ... Push button 1e ... IC card drive 1f ... Storage circuit 1g ... Display control circuit 1h ... Key identification circuit 1i ... Voice generation circuit 1j ... Central controller 1k LAPD processing LSI 11l Encoding / decoding circuit 1m Communication path switch circuit 1n Layer 1 processing LSI 1o Speaker 1p Terminal interface circuit 1q External device such as FAX device 2 ISDN subscriber line Switch (also service-managed data management node) 3 ... Terminal call processing program management center 4a ... "Call setup" signal 4b ... "Call setup acceptance" signal 4c ... "Response" signal 4d ... "Release" signal 4e ... "Release completion" 5a Data request signal 5b Data request acceptance signal 5c Data notification 5d Data end End signal 5e Data end confirmation signal 6a ... "additional information" signal 6b ... "additional information" signal 7a ... status collation signal 7b ... status collation result signal 8 ... service status table 9 ... service collation result table 10a ... "additional information" Signal 10b ... "additional information" signal 10c ... "additional information" signal 11a ... state collation signal 11b ... state collation result signal

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-2-170756 (JP, A) JP-A-61-261951 (JP, A) JP-A-62-135052 (JP, A) JP-A 63-261 78696 (JP, A) JP-A-3-143132 (JP, A) JP-A-4-68650 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04M 3/42 H04M 11 / 00-11/10 H04Q 3/545

Claims (16)

(57) [Claims] A program for performing a service is stored.
A subscriber terminal for lifting, a communication system having a center that manages a plurality of programs held by the subscriber terminal, and a switch for connecting the subscriber terminal and the center, the subscriber terminal, the Services scheduled to be provided on terminals
At least the version of the program related to the service
Means for storing service status information including
The service status check request at the
Means for adding the service state information and transmitting the service state information, wherein the center is provided with a service transmitted from the subscriber terminal via an exchange.
Service status information sent in response to check request
The center manages the versions of the programs included in
Means to match the version number of the program being used, and if the version numbers do not match, the program
Programs held at the relevant center
For transferring to the subscriber terminal via the exchange
Communication system, comprising and. 2. The communication system according to claim 1, wherein :
Te, Noboru each subscriber terminal allowed services to be provided
A management device for storing the recorded data, wherein the exchange is configured to receive the new data from the subscriber terminal via the exchange.
If you receive a registration request for a new service,
Services that are permitted to provide the above
After checking that there is a service
Communication system having means for sending a network request.
M 3. The communication system according to claim 2, wherein
In the exchange, the program is transferred to the subscriber terminal.
Is registered for each subscriber terminal of the management device.
Further comprising means for instructing the rewriting of data
A communication system characterized by the following. 4. The method according to claim 2, wherein
In the communication system, the management apparatus, and characterized in that provided in the exchange
Communication system. 5. The communication according to claim 2, wherein
In the communication system, the center determines the requested service as a collation result.
Is a service that is permitted to provide
And how to generate information indicating version mismatch
A communication system comprising a stage. 6. A program for performing a service is stored.
Manages the subscriber terminal and multiple programs held by the subscriber terminal.
A communication system comprising: a switching device , wherein the subscriber terminal is a service that is to be provided at the terminal.
And the version number of the program related to the service.
Means for storing service state information including at least a request for checking the service state of the subscriber terminal.
Means for adding and transmitting the service state information.
The exchange has a service transmitted from the subscriber terminal via the exchange.
Service status information sent in response to check request
The version of the program included in the
Means for checking the version number of the program and when the version numbers do not match,
Programs held at the relevant center
And a means for transferring the data to the subscriber terminal . 7. A program for performing a service is stored.
Manages the subscriber terminal and multiple programs held by the subscriber terminal.
Centers, exchanges connecting the subscriber terminals to the centers, and services permitted to be provided are registered for each subscriber terminal.
Communication system comprising a management device and that holds the recording data
The exchange , wherein the exchange receives a new message from the subscriber terminal via the exchange.
Receiving a registration request for a service, the management device
Refers to the data held in the
Service is an acceptable service to provide
After the matching, the center is sent to the center together with the matching result.
The center has means for sending a service check request, and the center requests the service to be provided by the subscriber terminal,
Services that are permitted to be provided, and
The versions of the programs to be implemented do not match.
The version of the program held by the subscriber terminal
Is permitted to be provided by the management device.
Process to match the version of the program corresponding to the service
A communication system having means for performing the communication. 8. A program for performing a service is stored.
Manages the subscriber terminal and multiple programs held by the subscriber terminal.
Exchanges and services permitted to be provided are registered for each subscriber terminal.
Communication system comprising a management device for holding recorded data
The exchange, from the subscriber terminal via the exchange, a new service
Upon receiving the registration request, the data held in the management device is received.
Referring to the data, the requested service provides
For checking whether the service is permitted
And the services that the subscriber terminal requires to provide
Services that are permitted and to realize such services
If the versions of the programs do not match,
The version number of the program held by the subscriber terminal is stored in the management device.
Support services that are allowed to be
Means for performing processing to match the version number of the program
A communication system, comprising: 9. The communication according to claim 1, wherein
In the communication system, the subscriber terminal is an I interface terminal,
The exchange communicates with the subscriber terminal via an ISDN line.
And a communication system for connecting the communication system to the communication system. 10. Communication with a center for managing programs
A program for connecting via lines and providing services
In a subscriber terminal whose ram can be modified, the service scheduled to be provided at the terminal
At least the version of the program related to the service
Means for storing service status information including
The service status check request at the
Means for adding the service state information to the center, and sending from the subscriber terminal sent from the center.
The version number of the program included in the service status information,
Verification result with the version of the program managed by the center
Means for receiving, when the version numbers do not match, program which the version number does not match
Program received from the center,
Means to enable the provision of services by gram
Subscriber terminal according to claim Rukoto. 11. A program for performing a service.
Communication with the subscriber terminal to hold, a center that manages a plurality of programs held by the subscriber terminal, and a switch for connecting the subscriber terminal and the center
A communication method for modifying a function of a subscriber terminal in a system, the method comprising:
Service that is scheduled to be
Service at least including the version number of the related program
Stores the state information, check request service state in the subscriber terminal
Is transmitted with the service state information added thereto.
Received the service check request sent
Version of the program included in the provided service status information
Is compared with the version number of the program being managed, and if the version numbers do not match, the program
Programs held at the relevant center
Is transferred to the subscriber terminal via the exchange . 12. A grouped subscriber terminal capable of modifying a program held for performing a service through a communication line, a center managing a plurality of programs provided to the subscriber terminal, and subscribing. A communication system for performing a function modification of a subscriber terminal having a subscriber terminal and an exchange connecting the center , wherein the center is provided from any one subscriber terminal in the group or one pre-designated subscriber terminal . Service needs to be modified
When the request is received via the exchange , the service is provided for all the subscriber terminals in the group.
About the program held in
Professionals to provide contracted services
Verify and Gram match, and if the program does not match, the program corresponding to the service via a switch, to all subscriber terminals rewriting is determined necessary programs in the group A communication system for performing a function of transferring a subscriber terminal, wherein the subscriber terminal in the group modifies a program. 13. A grouped subscriber terminal capable of modifying a program held for performing a service through a communication line, a center managing a plurality of programs provided to the subscriber terminal, and subscribing. A communication system for performing a function modification of a subscriber terminal having a subscriber terminal and an exchange connecting the center , wherein the center is provided from any one subscriber terminal in the group or one pre-designated subscriber terminal . Service needs to be modified
Upon receiving through the exchange machine required, groups within the smell
Is set in common as a change target in the group
The program that the subscriber terminal maintains to provide the service
Ram and the subscriber terminal provided in advance
Check whether the program matches the program for providing a possible service, and if the program does not match , determine that the program corresponding to that service needs to be rewritten through a switch in the group. A communication system for performing a process of transferring to all of the subscriber terminals that have been set, and for modifying the functions of the subscriber terminals in the group, wherein the subscriber terminals in the group modify the program. 14. A grouped subscriber terminal capable of modifying a program held for performing a service through a communication line, a center managing a plurality of programs provided to the subscriber terminal, and subscribing. A communication system for performing a function modification of a subscriber terminal having a subscriber terminal and an exchange connecting the center , wherein the center is provided from any one subscriber terminal in the group or one pre-designated subscriber terminal . Service needs to be modified
Upon receiving through the exchange machine required, groups within the smell
The subscriber terminal individually set as the
The programs held to provide services and the subscription
Service that can be provided in advance for
Check whether the program matches the program to be provided.If the program does not match , change the program corresponding to the service via the exchange to all the programs in the group that are determined to require rewriting of the program in the group. A communication system for performing a function of transferring a subscriber terminal, wherein the subscriber terminals in the group modify a program. 15. A grouped subscriber terminal capable of modifying a program held for performing a service through a communication line, a center managing a plurality of programs provided to the subscriber terminal, and a subscription. A communication system for performing a function modification of a subscriber terminal having a subscriber terminal and an exchange connecting the center , wherein the center is provided from any one subscriber terminal in the group or one pre-designated subscriber terminal . Service needs to be modified
Upon receiving through the exchange machine required, groups within the smell
The subscriber terminal that has made the correction request is designated as a change target.
The designated subscriber terminal retains to provide the service
The contract for the program and the subscriber terminal
Program that provides the services that can be provided. <br/> If the programs do not match , the program corresponding to the service is exchanged via the exchange to the program in the group. A communication system which performs a process of transferring to all the subscriber terminals determined to need to be rewritten, and modifies a program of the subscriber terminals in the group, wherein the subscriber terminals in the group modify the program. 16. A grouped subscriber terminal capable of modifying a program held for performing a service through a communication line, a center managing a plurality of programs to be provided to the subscriber terminal, and a subscription. A communication system for performing a function modification of a subscriber terminal having a subscriber terminal and an exchange connecting the center , wherein the center is provided from any one subscriber terminal in the group or one pre-designated subscriber terminal . Service needs to be modified
Upon receiving through the exchange machine required, groups within the smell
Te, for the subscriber terminal, to provide the service each
Information about the subscriber terminal and the programs
To provide available services that have been contracted in advance.
Check if the program matches the program, and if the program does not match , change the program corresponding to the service to all subscriber terminals that need to be rewritten in the group via the exchange. Process to transfer to and hold to provide services held by subscriber terminals
Contract with the subscriber terminal for the program to be
Program for Providing Provided Available Services
The program held by all subscriber terminals in the group when checking whether
Within the group, subject to change in the group
Programs the subscriber terminal which is set commonly held, within a group, pressurized set individually for modification
Program subscribers terminal holds, and, in the group
Oite subscriber terminal that the modification request and change target
The designated subscriber terminal is retained to provide the service
Select at least one of the two programs to check if the services match, and if the programs do not match , change the program corresponding to that service to a program in the group via the exchange. A communication system for performing a function of transferring to all the subscriber terminals determined to need to be rewritten, and performing a process of modifying a program for the subscriber terminals in the group. .