JPS63228898A - Incoming call processing method for communication controller - Google Patents

Abstract

PURPOSE:To minimize the occurrences of rejection against incoming calls by including the representative numbers of respective kinds of matching in addition to subaddress information elements and matching information elements in a call setting message managed by a communication controller that controls inter-terminal communication through an integrated service digital network. CONSTITUTION:In the communication controller 9, telephone sets 12-15 and a facsimile equipment 16 are included as existent terminals. Upon receiving a call setting message through the ISDN(integrated service digital network 10, the controller 9 makes the call arrives at a terminal designated by a subaddress when an incoming subaddress information element is included, but if not included, the presence/absence of a matching information element in an information included in the call setting message is checked, and in case of absence, the call is made arrive at a terminal of a designation kind having the matching most frequently used. When the matching information element is present, whether it agrees with the respective matchings of the included terminals or not is judged, and if an agreeing terminal exists, the call is made arrive at this terminal. When there is no terminal to receive the call, a procedure to reject the incoming call is taken against the opposite terminal of the transmission source.

Description

[Detailed description of the invention] (Industrial application field) The present invention is directed to a comprehensive service digital network [hereinafter referred to as "comprehensive service digital network"].

I S D N (Integrated 5ervi
The present invention relates to an incoming call processing method in a communication control device for communicating between existing terminals or communicating via an I5DN for the purpose of accommodating existing terminals in a network (abbreviated as CES Digital Natvork).

(Conventional technology) In recent years, new technologies such as LSI and optical fiber transmission technology have created integrated digital networks with features such as economic efficiency, suitability for processing multiple traffic, and stable transmission performance.
ISDN (I
nto(rated S'services Digit
alNetwork: Comprehensive service digital (integrated) network] is expected.

Figure 3 shows an outline of a communication system using l5DN,
1 is a communication control device, 2 is an l5DN, and they are connected via an interface 3. Communication control device i
! 1 includes telephones 4 to 7 as existing terminals. A facsimile machine 8, etc. is accommodated and connected, and each terminal 4 to 8 is given a unique sub-address, and the communication control device 1 uses the sub-address information, matching information such as function classification information such as telephone, facsimile, etc. It manages capability classification information such as information transfer ability and information transfer speed.

FIG. 4 is a diagram showing the frame format of a call setup message received by the terminal via the 15DN2.

Each of the information elements protocol identifier a, call number S, message type C, and transmission function d is essential information for a call setup message, and the protocol identifier a and message type C are call function information elements, which are used to It is determined that the message is a call setup message.

The transfer function information element d displays transfer function elements such as the transfer rate and transfer capacity 2 communication form provided by the 15DN.

Further, the channel identifier e is a channel identification information element for connecting to the 15DN, and is the calling number f.

The originating sub-address g indicates the ID of the sending terminal, and the called sub-address i indicates the ID of the receiving terminal.

Furthermore, consistency j is a display of function classification information such as a telephone, facsimile, or personal computer of the sending terminal, and capability classification information such as transfer speed and transfer ability.

In addition, the last user-user information is an information element used for transmitting information between users, and the message from the other user is displayed as is, and the information elements from e to k above are optional information. is an element.

FIG. 5 is an incoming call processing flowchart showing the connection operation based on the call setting message shown in FIG.

The information contained in the call setup message is checked for the presence or absence of called subaddress information element (SL), and if it is present,
Receive the call to the terminal specified by that subaddress (
S2). If there is no first destination subaddress information element, the received call setup message is checked to see if there is a consistency information element (S3). If there is a consistency information element, it is checked whether it matches the consistency of the terminals 4 to 8 that it accommodates (S
4) If there is a matching terminal, the call will arrive at that terminal (S
5).

Additionally, if the call setup message does not include a compatibility information element, or if the compatibility does not match the accommodating terminal, procedures are taken to reject the call from the sender's terminal (S 6). .

In this way, even if the conventional communication control device 1 is used, if the received call setup message contains at least one of the called subaddress information element and the consistency information element,
It is possible to receive a call normally on the terminal.

(Problem to be Solved by the Invention) However, in the above-mentioned call processing method, when both the called subaddress information element and the consistency information element do not exist in the call setup message, the I5DN will process the call to the terminal that accommodates the call. There was a problem in that the received call setup message was often rejected.

The present invention aims to solve the above-mentioned problems by providing an incoming call processing method that minimizes call rejection.

(Means for Solving the Problems) The present invention achieves the above object by providing a subaddress information element that is accommodated in a call setup message managed by a communication control device! ! This is achieved by accommodating a representative number for each compatibility type as an information element in addition to the compatibility information element.

(Function) By the above-described means, the present invention enables a call setup message received via an 15DN to include all of the most frequently used consistency information elements, even when neither the destination subaddress information element nor the consistency information element exists. By receiving a call on a terminal or a specific terminal, the call can be rejected, or the terminal to which the call should be received cannot be identified.

Unable to receive calls can be minimized.

(Examples) Hereinafter, the present invention will be explained in detail by examples using the drawings.

FIG. 1 is a configuration diagram of a communication system showing an embodiment of the present invention, and FIG. 2 is a call reception flowchart for explaining FIG. 1.

In FIG. 1, 9 is a communication control device, 10 is an l5DN, and these are connected via an interface 11. The communication control device 9 includes telephones 12 to 15 as existing terminals. Facsimile 16 etc. are accommodated and connected,
A unique sub-address is assigned to each of these terminals, and the communication control device 9 manages the sub-address information, consistency information, and representative number for each consistency type of each of the terminals accommodated therein. .

In such a configuration, the communication control device 9 has ■5DNI
Upon receiving a call setup message via O.

First, it is checked whether or not it contains a called subaddress information element (SL) (Figure 2, the same applies below), and if it does, the call is sent to the terminal specified by that subaddress (S2). If there is no called party subaddress information element, it is checked whether there is a consistency information element in the information included in the received call setup message (S3). If there is no such terminal, the call is received at the designated type terminal having consistency that is used most frequently (S4). In addition, if there is a consistency information element, it is determined whether or not it matches the consistency of each of the accommodated terminals 12 to 16 (S5), and if there is a matching terminal, the call is received at that terminal (S6). ). If there is no terminal that will receive the first call, procedures are taken to reject the call from the other party's terminal as the sender (S7).

As described above, the present invention provides a method that enables even if a call setup message received via an 15DN does not include both a called subaddress information element and a matching information element.
By managing the designated type terminal information element having consistency that is most frequently used by the 8 communication control device, it becomes possible to receive a call to a terminal of the designated type.

(Effects of the Invention) As is clear from the detailed explanation above, the present invention allows a communication control device to manage sub-address information, consistency information, and representative numbers for each consistency type of terminals accommodated. As a result, even if a call setup message received via the 15DN does not include either the called subaddress information element or the consistency information element, the call can be received at the terminal that accommodates the call, and the communication control device can reject the call or reject the call. This solves all the problems of not being able to receive calls due to being unable to identify the person.

It can receive calls over a wide range, and therefore can greatly function as a comprehensive communication network.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a communication system showing an embodiment of the present invention, Fig. 2 is an incoming call processing flowchart to explain Fig. 1, Fig. 3 is a block diagram of a conventional communication system, and Fig. 4 is a block diagram of a communication system according to an embodiment of the present invention. FIG. 5, which is a diagram showing the frame format of the call setting message, is a flowchart of the incoming call process for explaining FIG. 3. . 1.9...Communication control device, 2,10...Integrated service digital network (abbreviated as ISDN), 3.11...
Interface, 8, 16...Facsimile. Fig. 1 11...Interface 12-15...Telephone 16゛Facsimile Fig. 2 Fig. 3 3...4 links 7 Ace 4-7...Telephone 8...Facsimile Fig. 4 Fig. 5

Claims (1)

[Claims] In a communication control device that accommodates a plurality of existing terminals in a combined service digital network and controls communication between terminals via the integrated service digital network, terminal sub-address information, consistency information, or each consistency type By managing the representative number, when a call arrives at a terminal via the comprehensive service digital network, if the received call setup message has a called subaddress information element, the call arrives at the corresponding terminal, and the called subaddress information element is If there is a consistency information element and there is no consistency information element, the call will arrive at all terminals whose consistency matches, and if there is no destination subaddress information element or consistency information element, the terminal with the consistency that is used most frequently An incoming call processing method in a communication control device, characterized in that the incoming call is received at all or a specific terminal.