JPS61245755A - Common line signal system - Google Patents

Abstract

PURPOSE:To execute the normality test of a talking line by the equal procedure to that of a line individual signal system by using a talking trunk added with a simple loopback system in place of a continuity test exclusive trunk. CONSTITUTION:An exchange control section 5 at a sending side sends a loopback indication to a corresponding talking trunk 7 at the incoming side based on an address control signal (a) received via a common line signal device 6 at the incoming side. The talking trunk 7 at the incoming side returns a talking check signal (b) sent from the sender station side by using a loopback circuit according to the said indication. When the talking trunk 2 of the sender side receives the talking check signal (b), the trunk 2 informs the end of check to the exchange control section 1 at the sender side. The exchange control section 1 at the sender side connects the talking path (i) of a talking switch 8 at the sender side through the said notice and sends a common line continuity qualified signal (c) to the incoming side via a common line signal link 4 from a common signal device 3 at the sender side.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to communication path continuity testing means used in common line signaling systems.

Here, the common line signaling system refers to a system in which a signal link independent of a communication path is shared by a plurality of communication paths.

〔overview〕

In the communication path continuity testing means of the common line signaling method, by adding a means to the receiving side to return the communication path check signal to the transmitting side, 1. The dedicated means required for continuity testing can be omitted, and as a result, during the test, This allows the connection and disconnection control of dedicated means to be omitted.

[Conventional technology]

In the conventional communication path continuity test method used in the common line signaling system, an address control signal containing the communication line to be used this time is sent from the originating station to the other station via the common line signal channel, and a continuity test is performed on the communication line trunk. Connect the trunk and send a check tone to the player from the continuity test trunk. Furthermore, on the receiving side, by connecting a return trunk to the corresponding call line trunk included in the address control signal received from the common line signal channel, the received check tone is returned using this return trunk. The continuity test trunk on the calling side detects the check tone returned from the other station to confirm the normality of the communication path between the two stations. After this Wi recognition, the calling side connects the call path and sends a continuity test good signal to the called side via the common line signal channel. When the called party receives this signal, it disconnects the return trunk from the call trunk and connects the call path.

[Problem that the invention seeks to solve]

In this way, a large number of continuity test trunks and turnaround trunks, which are dedicated call path continuity test trunks, are required based on the number of lines and traffic volume, and the link connection between the dedicated trunk and the call trunk and the Control operations such as disconnection require complex software processing, resulting in frequent connection delays.

The present invention eliminates the need for all dedicated continuity test trunks, and also eliminates the need for link control operations between dedicated trunks and call trunks, thereby simplifying software processing and shortening connection time when conducting continuity tests. The purpose is to provide a common line signaling system that allows

[Means for solving problems]

The present invention provides a plurality of communication paths between one station and the other station in parallel, a small number of signal links are connected between the one station and the other station, and a small number of signal links are connected between the one station and the other station. The station includes means for sending a communication path check signal to the other station via the selected communication path, and means for transmitting information regarding the selected communication path to the other station via the signal link. a common line signaling system comprising means for transmitting, as a means for resolving the aforesaid point of interest, said other station receiving said first signal based on information transmitted via said signal link; The present invention is characterized by comprising return means for returning the communication path check signal received from the signal sending means to the one station via the communication path in the opposite direction corresponding to the selected communication path.

[Effect]

A channel check signal is sent from one station to another via the selected channel, and an address control signal is sent via the signal link.

When the channel check signal arrives at the other station, a return circuit connected to the channel selected based on the address control signal is activated, and the channel check signal is sent back to the one station.

When a communication path check signal arrives at one station, a communication path within the station related to the selected communication path is set, and a good continuity signal is sent to the other station via the signal link.

When the good continuity signal arrives at the other station, a communication path within the office related to the selected communication path is set.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

First, the configuration of this embodiment system will be explained based on the drawings.

In this method, the originating side controls a communication path switch 8, a communication trunk 2 connected to the communication switch, a common signaling device 3, and an exchange that controls the communication path switch 8, the communication trunk 2, and the common channel signaling device 3. and a part l. Also,
The receiving side includes a call switch 9, a call trunk 7 connected to the call switch 9, a common signal device 6, and an exchange control section 5 that controls the call switch 9, the call trunk 7, and the common line signal device 6. Be prepared.

Next, the operation of this embodiment system will be explained based on the drawings.

The switching equipment controller on the calling side selects a vacant call trunk 2, instructs the common line signaling device 3 to send an address control signal a to the opposing station via the common line signal link 4, and selects the call trunk 2 to be used. A check instruction is sent to trunk 2. In response to this instruction, the call trunk 2 on the calling side sends out a call route check signal. On the other hand, the exchange control unit 5 on the called side sends a return instruction to the corresponding call trunk 7 on the called side based on the address control signal a received via the common line signaling device 6 on the called side. In response to this instruction, the call trunk 7 on the called side sends back the call path check signal sent from the calling station to the call trunk 2 on the calling side using a return circuit. When the calling trunk 2 on the calling side receives the call path check signal, it notifies the switching equipment control section 1 on the calling side of the completion of the check. Based on this notification, the exchange control unit 1 on the originating side connects the call path i of the call switch 8 on the originating side, and the common line signal device 3 on the originating side passes the common line signal link 4 to the receiving side with good common line continuity. Send signal C. When the exchange control unit 5 on the receiving side receives the common line continuity good signal C via the common line signaling device 6 on the receiving side,
A return termination instruction is sent to the call trunk 7 on the called side, and the call path ii of the call switch 9 on the called side is connected.

〔Effect of the invention〕

As explained above, the present invention uses a call trunk with a simple return circuit instead of a continuity test trunk to conduct a call line normality test using the same procedure as the line individual signaling system. There is an effect that can be done.

[Brief explanation of drawings]

The figure is a block configuration diagram showing the configuration of the system according to the embodiment of the present invention. 1.5... Exchange control unit, 2.7... Call trunk, 3.6... Common line signal device, 4... Common line signal link, 8.9... Call switch, a. ... Common line address control signal, b... Call path check signal, I... Common line continuity good signal, 1Sii... Call path.

Claims (1)

[Claims] (1) A plurality of communication paths are provided in parallel between one station and the other station, and a small number of signal links are connected between the one station and the other station, and the one station means for transmitting a channel check signal to the other station via the selected channel; and means for transmitting information regarding the selected channel to the other station via the signal link. In the common channel signaling system, the other station transmits the channel check signal received from the first signal transmitting means to the selected call based on the information transmitted via the signal link. 1. A common line signaling system comprising return means for returning communication to said one station via a communication path in the opposite direction corresponding to the communication line.