JPS6165549A - Multiple access system of assignment request - Google Patents

Abstract

PURPOSE:To save the labor of maintenance crew and to facilitate the decision of a test result in terms of DAMA system by giving a function for testing specific basic items by remote control between terminal DAMA devices to a central DAMA device and testing a circuit. CONSTITUTION:In terms of terminal DAMA devices 5 and 9, trunks 6 and 10 are blocked in order to prevent the grasp from exchanges 4 and 11. Then a central DAMA device 1 informs the terminal DAMA devices 5 and 9, the trunks 6 and 10 and a testing satellite circuit through a terminal 3. Continuously the central DAMA device 1 and the terminal DAMA devices 5 and 9 carry out next actions automatically. A testing satellite circuit indicating signals is transmitted to the terminal DAMA devices 5 and 9 from the central DAMA device 1, and the receiving terminal DAMA devices 5 and 9 execute a talking circuit test. The terminal DMAM device 5 or 9 transmits the test result to the central DMAM device 1, and its contents are outputted to the terminal 3. After the termination of the test the terminal DAMA devices 5 and 9 release the blocking of the trunks 6 and 10.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to DAMA (Demand Assignment)
This invention relates to a line testing method for the Multiple Accers (Multiple Accers) system.

[Prior art]

FIG. 1 shows a partial example of a conventional DAMA system configuration mainly related to the present invention, in which 1 is a central DAMA device;
2 is a ground device, 8 is a terminal DAMA device, 4 is a trunk,
5 is a ground device, 6 is a terminal DAMA device, 7 is a trunk,
8 is a ground device, and 9 is a satellite.

DAMA (Demand Assign Multi
ple Access (allocation request multiple access) system is a system in which each DAMA device uses a certain number of lines in common,
This line allocation method allocates a pair of frequencies in a common pool each time a call occurs, and when the call ends, the allocation is canceled and the line is returned to the pool.

In a DAMA system, there are two lines; one is for sending and receiving common signals related to line allocation between the central DAMA device and terminal DAMA devices, and the common signal line is for terminal control between terminal DAMA devices for communication. This is a communication line that sends and receives control signals related to communication.

Testing of these two lines has not conventionally existed, and maintenance personnel manually conduct tests at each point by blocking the satellite line and the trunk to be tested at the central DAMA device and the terminal DAMA device. I was going there.

Conventional DAMA devices are configured as described above, and have the disadvantage that maintenance personnel must be present at the location where the test is to be performed, and the test results must be judged by the maintenance personnel. there were.

[Summary of the invention]

The present invention was made in order to eliminate the above-mentioned drawbacks of the conventional system, and aims to eliminate the need for line testing operations by maintenance personnel by providing a central DAMA device with a function for remotely controlling terminal DAMA devices. .

[Embodiments of the invention]

FIG. 2 is a conceptual diagram of the connection of the central DAMA device (1) and the terminal DAMA devices (5 and 9) with added functions related to the present invention, where 1 is the central DAMA device, 2 is the ground device, and 3 is the central DAMA device (5 and 9).
4 is a switch, 4 is a terminal DAMA device, 6 is a trunk, 6 is a ground device, 7 is a ground device, 8 is a terminal DAMA device, 9 is a trunk, 10 is a switch, and 11 is a satellite.

A line testing method for a common signal line for transmitting and receiving a common signal regarding line allocation between a central DAMA device and a terminal DAMA device.

As shown in Figure 2, the terminal of the central DAMA device (1) (
In step 3), the terminal DAMA device (5) to be tested is notified.

Then, the following operations are performed by the central DAM I device (1) and terminal D.
The AMA device (5) does this automatically.

The central DAMA device (1) sends a trunk status request signal requesting trunk status information to the terminal DAMA device (5), and the terminal device (5) receives the trunk status request signal.
) sends trunk status indication signals to the central DAMA device (5).
Send to.

Upon reception of the trunk status indication signal or no signal being returned, the central DAMA device (1) outputs a test result message to the terminal (3).

The following test sequence is shown in Figure 8.

A test method for telephone lines in which control signals of subscriber terminals are transmitted and received between terminal DAMA devices.

As shown in FIG.
The trunk (6, 10) is occluded to prevent capture from. Terminal DAMA devices (5, 9), trunks (6, 10) and trunks (6, 10) are tested in the central DAMA device (1).
) and the test satellite line from the terminal (3).

Then, the following operations are performed on the central DAMA device (1) and terminal D.
AMA installation (5, 9) Ha automatic Tetsu.

A test satellite line designation signal is transmitted from the central DAMA device (1) to the terminal DAMA devices (5, 9).

The terminal DAMA device that received the test satellite line designation signal (
Perform the telephone line test in steps 5 and 9).

Transfer the test results from the terminal DAMA tray (5 or 9) to the central D
It is transmitted to the AMA device (1) and its contents are output to the terminal (3).

After the test is completed, the trunk (6, 10) is unblocked at the terminal DAMA device (5, 9).

The above test sequence is shown in FIG.

This method can also be used for communication methods other than satellite communication,
Further, a plurality of exchanges can be connected to the DAMA device.

〔Effect of the invention〕

As described above, according to the present invention, in a DAMA system, a line test between a central DAMA device, terminal DAMA devices, and remote terminal DAMA devices can be performed only by operations on the central DAMA device.

[Brief explanation of drawings]

FIG. 1 is a system configuration diagram mainly showing a partial example of the configuration of a conventional DAMA system related to the present invention, and FIG. 2 is a system configuration diagram showing a central DAMA device and terminal DA when implementing the present invention.
The conceptual diagram of the ΔIA device, FIGS. 3 and 4 are test sequence diagrams of the present invention.

Claims (1)

[Claims] In a DAMA system, a central DAMA device and a terminal DA
An allocation request multiple access method that combines the functions of the following basic items between MA devices and remote control with line processing procedures. a, central DAMA device common signal transmission and reception function test b, terminal DAMA device common signal transmission and reception function test c, terminal DAMA device status check test d, communication line quality test e, terminal DAKA device control signal transmission and reception function f, common signal line quality test