JPH04275760A - Line signal selection system - Google Patents

Abstract

PURPOSE:To effectively use a line between exchanges without the need of previously deciding a unique signal system corresponding to the line between the exchanges and without being affected by means of hourly fluctuation by individual calls by using a signal system identification means provided for the exchange of a call-side and selecting the signal system between the exchange based on the types of the call. CONSTITUTION:A prescribed line adjusted to an inter-exchange traffic amount is prepared for connecting an exchange A 1 storing a subscriber a 4 with an exchange B 2 storing a toll line, a switchboard 5 and a subscriber b 6. The exchange A 1 retrieves a signal system selection part 3 based on the types of the call segmented by '0' and 1XY and called side number information excepting said numbers at the time of a call connection processing. The exchange A 1 applies the signal system which the signal system selection part 3 extracts to the inter-exchange line concerned, which is selected from the lines between the exchanges A 1 and B 2.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line signal selection method for selecting a signal method used between exchanges.

0002

2. Description of the Related Art Conventionally, the signaling system between exchanges has been determined in advance based on the conditions of each exchange. That is, the number of lines between exchanges and the signaling system used on each line are uniquely determined as station data.

FIG. 2 is a diagram for explaining an example of a conventional method. In FIG. 2, an exchange A7 accommodating subscriber a4,
Exchange B that accommodates the toll line, switchboard 5, and subscriber b6
A predetermined number of long-distance call routes and local call routes are prepared in order to connect the station to 8, and the respective signaling systems used for these routes are fixedly set in the station data in advance. Therefore, when the exchange A7 performs outgoing connection processing and connects between stations by referring to the station data based on the number information of the called party, the switching station A7 has already set the signal system suitable for each route. An unoccupied line is selected from the corresponding route.

0004

[Problem to be solved by the invention] In this conventional method,
In order to change the number of lines and their signaling system, it is necessary to change the office data of both exchanges. In the example in Figure 2, even if the number of long-distance calls increases and there is a shortage of lines, and on the other hand, there is sufficient line availability for local calls, unless the number of lines on the corresponding route and its signaling method are changed using the station data, , this problem cannot be improved. Furthermore, in this case, since the ratio of local calls to long distance calls changes over time, it is impossible in actual maintenance to manually change the station data according to this change over time.

[0005]

[Means for Solving the Problems] The present invention searches a signaling system identification means provided in the exchange based on the call type classified by called party number information when a storage program controlled exchange performs outgoing connection processing. However, the configuration is such that the corresponding signaling system is extracted, and the signaling system extracted by the signaling system identifying means is applied to the corresponding interoffice line selected by the exchange.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a diagram for explaining one embodiment of the present invention. In FIG. 1, switching center A1 accommodates subscriber a4.
A predetermined line suitable for the amount of interoffice traffic is prepared to connect the toll line, exchange 5, and exchange B2 which accommodates subscriber b6. The switching center A1 on the calling side includes a signaling system selection section 3 that identifies the signaling system based on the call type classified by the called side number information.

[0008] Below, subscriber a4 of exchange A1 makes a long distance call (a call with "0" at the beginning of the calling telephone number) and an incoming call (calling telephone number with "0" at the beginning of the calling telephone number) via exchange B2. 1×Y”) and an incoming call to a subscriber of switching center B2 will be explained.

[0009] These three types of calls pass through the line between A and B, but in this case, during the outgoing connection processing at exchange A1, depending on the type of call, ``0'', ``1 x Y'', or other The signal system selection unit 3 is searched by the number and the corresponding signal system is selected and extracted. Then, the exchange A1 applies the signal system extracted by the signal system selection unit 3 to the line selected from among the lines between the A and B stations. Therefore, there is no need to decide in advance the signal system for each line between stations A and B, and the line can be used for various signal systems depending on the time.

0010

Effects of the Invention As explained above, the present invention uses the signaling system identifying means provided in the calling exchange to select the signaling system between the stations based on the type of call, thereby reducing the number of lines between the stations. There is no need to decide in advance a unique signaling system that corresponds to the call type, and if this selected signaling system is applied to the line selected by the originating exchange, the signal system will not be affected by temporal fluctuations depending on the call type. This has the effect that lines between stations can be used effectively.

[Brief explanation of the drawing]

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

FIG. 2 is a diagram for explaining a conventional method.

[Explanation of symbols]

1,7　　　　　Exchange A 2,8　　　　　Exchange B 3 Signal system selection section 4 Subscriber a 5 Switching table 6 Subscriber b

Claims (2)

[Claims] Claim 1: When a storage program controlled exchange performs outgoing connection processing, a signal system identifying means provided in the exchange is searched based on the call type classified by called party number information, and the corresponding signal system is extracted. A line signal selection method characterized by: 2. The line signal selection system according to claim 1, wherein the signal system extracted by the signal system identification means is applied to the corresponding interoffice line selected by the exchange.