JPH01208953A - Digital trunk control system - Google Patents

Abstract

PURPOSE:To realize a line fault test economically without connecting an expensive externally mounted test equipment by providing a line fault generating circuit and an inserter in a digital trunk. CONSTITUTION:A line fault generation instruction sent from a central processing unit 1 is fed to a line controller 7 via time division switch 2 highway 8 dropper/inserter 3 control line 9. When the line fault generation instruction is addressed to the digital trunk 6, the line controller 7 controls the line fault generating circuit 6b in the digital trunk via the control line 10 to generate fault information and sends it to an inserter 6a. The inserter 6a inserts it to a sender side PCM line 12 and sends it to an opposite station. The response from the opposite station with respect to the fault information is received from the reception side PCM line 11 and reported to the central processing unit 1 via a digital trunk 6 control line 10 line controller 7 control line 9 dropper/inserter 3 highway 8 time division switch 2 to conduct the fault processing test.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a digital line control system in a digital electronic exchange, and particularly to a digital trunk control system.

[Conventional technology]

Conventionally, when performing fault handling tests on digital line-related devices, a tester was connected to a PCM line terminated with a digital trunk, a pseudo fault was generated, and the test was performed.

[Problem to be solved by the invention]

In the conventional fault handling test described above, an external tester is connected to the PCM four wires, but in order to interface the tester with the digital trunk, the tester itself must at least have a You will need something with more than 11 functions. Therefore, the tester becomes expensive and is not economical.

The purpose of the present invention is to
The purpose of this invention is to provide a digital trunk control method that enables failure handling tests.

(Means for Solving the Problems) The digital trunk control system of the present invention is a digital trunk that terminates a PCM line, and includes a line fault occurrence circuit that generates line fault information, and a line fault generation circuit that generates line fault information. Line failure information) K to sending side T) CM I”1
The digital trunk includes an inserter that is inserted into the line, and a line control device that controls the line failure generation circuit and generates line failure information.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention. P
Each digital trunk that terminates a CM line (only two digital trunks 5 and 6 are shown in the figure) has a line fault generation circuit that generates line fault information and a line fault generation circuit that transmits the generated line fault information to the transmitting PCM line. It has a built-in inserter for inserting into the device.

In FIG. 1, an inserter 6a and a line fault generation circuit 6b are typically shown within the digital trunk 6.

The line fault occurrence circuit of each digital trunk is connected to a line control device 7, and this line control device performs control operations based on a line fault occurrence command from a central processing unit, which will be described later.

The digital multiplexing device 4 to which the digital trunk is connected is connected to the time division switch via the dropper/inserker 3, and the line control device is connected to the dropper/inserker 3.
It is connected to the time division switch 2 via. A central processing unit 1 is connected to the time division switch 2 .

Next, the operation of this embodiment will be explained.

A line fault occurrence command sent from the central processing unit 1 is sent to the line control unit 7 via the time division switch 2 → highway 8 → dropper/inserter 3 - control line 9. If this line fault generation command is for the digital trunk 6, the line control device 7 controls the line fault generation circuit 6b in the digital trunk 6 to generate specified fault information via the control line 10. . As a result, the line fault generating circuit 6b generates fault information, and the inserter 6
Send to a. The inserter 6a inserts this into the transmitting side PCM line 12 and sends it to the game player. A response from the opposing side to this failure information is received from the receiving side PCM line 11, and is sent from the digital trunk 6 to the control line 10 to the line control device 7 to the control line 9 to the dropper/inserter 8 to the highway 8 to the time division switch 2. The information is reported to the central processing unit 1 via. As a result, a failure handling test is performed.

In the above procedure, by online control of the central processing unit 1, it is possible to automatically generate a line failure and verify the failure handling function in an interwork test with a game player.

Furthermore, if a return loop 13 is created between the digital trunks in FIG. It is also possible to test only

〔Effect of the invention〕

As described above, by providing a line fault generation circuit and an inserter in a digital trunk, the present invention can economically implement a line fault test, which was conventionally performed using an expensive external tester. From an economic point of view, the line failure circuit and inserter can be easily incorporated into a conventional circuit if they are integrated into an LSI, and the increase in cost is very small.

Furthermore, since it is possible to detect and verify the occurrence of line failures by controlling the online program of the electronic exchange, it can also be used to debug online programs.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a configuration for realizing a digital trunk control method according to the present invention. 1...Central processing unit 2...Time division switch 3...Dropper/inserter 4...Digital multiplexer 5.6...Digital trunk 6a... Line failure circuit 6b...Inserter 7...Line control device 8...Highway 9.10...Control line 11...PCM line (receiving side) 12... ... PCM line (transmission side) 13 ... Return loop (between digital trunks) 14 ... Return loop (digital trunk self-return) Agent Patent attorney Yoshiyuki Iwasa] Figure 1

Claims (1)

[Claims] (1) A digital trunk that terminates a PCM line, which includes a line fault generation circuit that generates line fault information and an inserter that inserts the line fault information generated by this line fault generation circuit into the transmitting PCM line. A digital trunk control method comprising: a digital trunk that controls the line failure; and a line control device that controls the line failure generation circuit and generates line failure information.