JPH04114594A - Representative selection system - Google Patents

Abstract

PURPOSE:To attain the selection of an called terminal interface in response to a type of a caller terminal equipment by adding an indication for a called terminal equipment to call setting information from a caller terminal equipment requesting representative selection, identifying the indication by a called subscriber exchange and selecting a called terminal equipment matched with the indication by the called terminal equipment type. CONSTITUTION:A called terminal equipment type indication G4FAX is added to call setting information from a caller terminal equipment 16 requesting representative selection, it is identified by the subscriber exchange 10 which has a function of identifying the indication and selecting a called terminal equipment matched with the called terminal equipment type indication. When the caller terminal equipment 16 requesting representative selection desires to be connected to a terminal equipment, e.g. G4FAX, the terminal equipment 16 sets an indication G4FAX to the called terminal equipment type indication of the call setting information and makes a dialing, then a subscriber line exchange receiving the call setting information identifies the indication and selects an idle G4FAX terminal equipment among terminal equipments incorporated in the representative group. Thus, the caller terminal equipment is connected to the G4FAX terminal equipment and the connection to the desired called terminal equipment type is attained.

Description

[Detailed description of the invention] [Industrial application fields] The present invention relates to a representative selection scheme in ISDN.

[Prior art] Conventionally, the representative selection method in TSDN was described in the technical reference material INS Net Service Interface Volume 3 (Layer 3 Circuit Switching II) published by the Telecommunications Association, pages 311 to 31.
In the case where only ISDN'IA end interfaces are represented as shown in 3.

The method was to select an available receiving terminal interface when receiving a call to a Paphlot number. In addition, how to select the first free interface! Two loading methods are available: 9I, search method and Lau〉/Tropin method.

[Problem M where the invention is about to take place] H. The prior art does not take into account the types of ISDN terminals that are included in the representative when selecting one representative.1 For example,
If a G4FAX terminal and a voice telephone terminal are integrated into the same representative and a pilot number is given to the voice telephone terminal, 04FA
When a call is made from an X terminal and a call is received to a pilot number, a voice telephone terminal interface is selected and the connection is made, so FAX communication cannot be performed.In other words, there is a problem in that it is not possible to select a receiving terminal interface according to the type of the calling terminal.

SUMMARY OF THE INVENTION An object of the present invention is to enable the selection of a receiving terminal interface according to the type of one calling/l terminal using a representative selection method in ISDN.

[Means for solving the problem] In order to achieve the following two objectives, the present invention requires representative selection! r! ! Adds the receiving terminal type display to the call setting information from the terminal, and allows one subscriber exchange! We have added a function to select one IF call terminal by dividing it into 1J1 East and 91X, and displaying the type of receiving terminal.

[Operation] At the originating terminal requesting representative selection, for example, 04F
When you want to connect to an AX terminal, set G4FAX in the receiving terminal type display of the call setting information and make a call.The subscriber line exchange that received the call setting information will identify it and incorporate it into the representative. Free 04FAX among terminals
By selecting a terminal, one originating terminal can be connected to the 04 FAX terminal, that is, it is possible to connect to the type of terminal from which the call is to be received.

[Example] Hereinafter, one embodiment of the present invention will be described in detail.

Figure 1 shows the processing procedure at the destination ISDN switch when the present invention is applied. ! It is a flowchart showing an i example, and the second garden is an example of -i of the representative selection list.

FIG. 3 shows various information elements included in the call setup signal. FIG. 4 is a diagram showing the configuration of an ISDN9 switch and a subscriber terminal according to the T-invention. 4th field, here, 10 is the D N switch, 11 is ii story M!
The system 12 is a system for controlling call SI&W and operates according to an internally stored program. 13 and 1
7 is an interface where subscribers are accommodated. It is assumed that these interfaces form a representative group, and 17 is the representative pilot's interface.

13 is the representative child interface. 14 represents the subscriber's terminal device -as talk, 15 represents G4 FAX, 16
is the calling subscriber's terminal device t (G4FAX).

Next, the operation of FIG. 4 will be explained based on the flowchart of FIG. 1, the representative selection list example of FIG. 2, and the information elements included in the '4 setting signal of FIG. 3.

When the calling terminal 16 receives a 1M call, the receiving terminal 11 is included in the call setting signal of the 3rd fl in order to clearly display the W1 classification.
flQffl [I element: a4 FAXJ wo setting. Here, the communication terminal type information is information added from time to time to realize the present invention.

rsDN exchange IJ110 internal 1) fl control purchasing device is 1
When the call setting signal from the calling terminal 16 is received, the 1-incoming call processing program (step 100) is activated.

The incoming call processing program first determines whether the incoming telephone number is a representative pilot number.

(Step 101) It is determined whether the call setting signal includes a called terminal type information element in the case of the representative pilot number. (Step 102) If not included, conventional representative selection processing is executed. That is, the interfaces in the representative selection list shown in FIG. 2 are selected in ascending order from the top. (re-a-spa one type) or select from the next interface after the interface selected at the time of previous nursing care.
, (Lountropin method) (steps 104°108.
109.110) Contains the receiving terminal type information element The first step is to determine what the receiving terminal type is (Step 103) In this example, all 1M terminals are G4 FAX, so there is only one receiving terminal. "rl:G4F, AX" is set for the type. #: Branches to G 4 F A T (processing (step 106)).

The representative selection list in FIG. 2 has a terminal type indicating what kind of terminal is accommodated for each interface. If the determination in 103 is G4FAX, the terminal type is rL:G4FAXJ.
In this embodiment, only for the interface number: 2.5], an interface that is multiplied by JF is selected using the crossbar one-way method or the round-robin method. (Step 106) Next, it is determined whether one transmission is possible to the selected interface (there is an empty information channel and activation of layer 1 is OK). (Step 114) If the call cannot be received.

Determine whether or not there are any selectable interfaces left (Step 1137). If there are no interfaces left, there is no interface that can accommodate one arrival, and the call ends with a loss of 3! (Step 121). If so, select the primary interface.Step 116) - Determine again whether or not the selected interface can receive a call. (Step 114) As a result of the second step, a call is made to the selected interface station. (Step 1
20) The above process is exactly the same even when the terminal type determination in step 103 branches to general chatter or data terminal, and -,! 2, steps 103.111.112.113 are executed in the case of a telephone, and steps 107.117.11.3°119 are executed in the case of a data terminal.

According to this embodiment, when a 04FAX call is received, the 04FAX
X unaccommodated interface: 1.3.4.6
will no longer receive calls. Conversely, when a call is received from a general telephone number 2, the call will no longer be received on interfaces 2 and 5, which accommodate only G 4 FAX. This prevents a call from arriving at an interface to which no terminal capable of responding is connected.

In this embodiment, the incoming terminal N3'J is an Oni general telephone,
Although L: G4 FAX and 2: Data terminal are listed, other types of terminals, such as packet terminals, can also be added to the receiving terminal type for the same job.

In addition, in this example, the terminal type! ! In order to comply with this rule, the terminating terminal 1131J information element was added to the information element of the call setup signal, but instead of using the terminating terminal type information element, it was added to the information element of the call setup signal, but instead of using the terminating terminal type information element, it was It is also possible to determine the call type, that is, the type of called terminal.

[Effects of the Invention] According to the present invention, in the process of receiving a call to one representative group,
By identifying the receiving terminal type protected by the calling terminal and comparing it with the terminal type in the representative selection list managed by the exchange, it is possible to select only the interface to which the target terminal is connected and receive the call. It becomes possible.

Additionally, for subscribers receiving representative services, 04F
When connecting AX, etc., there is no need for the constraint that 64F AX, etc. must be connected to the first interface of the representative selection list managed by the exchange.

[Brief explanation of the drawing]

Fig. 1 is a flowchart showing an embodiment of the processing procedure of the present invention, Fig. 2 is an explanatory diagram of the representative selection 11 stroke according to the present invention, Fig. 3 is an explanation JFi diagram of the call setting signal according to the present invention, and Fig. 4
A is an explanatory diagram of an fsDN exchange and an interface according to the present invention. 10... ISDN switch, 11... Communication path device, 1
2...Control equipment! , 13.17... interface,
14...-! 2 tales, 15...G4FAX, 16.
...Outgoing terminal. 'iA2 Figure Atsushi 5

Claims (1)

[Claims] 1. The same telephone number is given to a plurality of ISDN terminal interfaces, and when a call is received, one of the ISDN
In the representative selection service connected to the SDN terminal interface, a terminating terminal type indication is added to the call setting information from the originating terminal requesting representative selection, and the terminating subscriber exchange identifies it and determines whether the terminating terminal type matches the terminating terminal type indication. A representative selection method characterized by providing a function to select a receiving terminal.