JPH066452A - Subscriber test system - Google Patents

Abstract

PURPOSE:To attain a subscriber line test without revising a conventional maintenance system even after the introduction of a PCM line by using a subscriber line test equipment for an analog exchange of a conventional system as it is with respect to the subscriber line test system in a subscriber system PCM transmitter. CONSTITUTION:The test system is a subscriber test system in a subscriber system PCM transmitter and a main terminal station 10 is provided with a line test monitor memory 21 and a subscriber test operation console 20 commands to read subscriber line test data measured periodically by a subscriber line test equipment 8 through a central processing unit 16, a central controller 7, a data link and a line test monitor memory 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a subscriber PCM in which a subscriber terminal and an analog exchange are connected by a PCM line.
The present invention relates to a subscriber line test method in a transmission device.

[0002]

2. Description of the Related Art A conventional technique will be described with reference to FIG. Reference numerals 1-1 to 1-n denote subscriber terminals, and a second subscriber analog interface (CH) 3-1 to 3-n via switchers 2-1 to 2-n for call and test. It is connected to the. And subscriber analog interface 3
-1 to 3-n are connected to a second PCM multiplexer (MUX) 4 which multiplexes these. Switch 2 here
-1-2-n, subscriber analog interface 3-1
System with 3-n and PCM multiplexer 4 (SYS)
Make up one. The same system as this system 1
A second common unit 5 common to these systems is added together to form a remote terminal station (RT) 6.

The common section 5 is a second central control unit (BANK CONT) 7 for multiplexing signals from the subscriber analog interfaces 3 in the PCM multiplexer 4.
And a subscriber line test device 8 for testing the subscriber line. Then, the subscriber line test device 8 tests, for example, the voltage, resistance, and capacity of the subscriber terminals 1-1 to 1-n according to an instruction from the central control device 7, and the result is tested by the central control device 7. Send it back to. At this time, control for A / D conversion and testing is performed by the central processing unit (C
PU) 16.

The signal multiplexed by the central controller 7 uses the spare bit of the PCM line to the main terminal station (COT) 1.
0 to the first PCM multiplexer (MUX) 11. The PCM multiplexer 11 and the first subscriber analog interfaces 12-1 to 12-n are connected to the system (SY).
S) 1 '. The main terminal 10 is a system 1 ',
, M ′ and a first common unit 17 having a first central controller (BANK CONT) 13. An operation terminal 1 capable of displaying a subscriber line test and its result through a data link described later on the central control unit 13 of the main terminal station 10.
4 is connected.

Each of the subscriber analog interfaces 12-1 to 12-n of the main terminal 10 is connected to the analog exchange 15, and the analog exchange 15 selects the called party corresponding to the number selected by the calling party. . When testing the subscriber terminal, the central control unit 1 is operated from the operation terminal 14 of the main terminal station 10.
Enter the test command in 3. The test command input from the operating terminal 14 is transmitted to the central control unit 7 on the remote child terminal 6 side via a data link under the control of the central control unit 13.

Upon receiving the test command, the central control unit 7 on the remote child terminal 6 side accesses the PCM multiplexer 4 to determine whether the line of the subscriber terminal 1-1 is idle or busy, for example. To do. If the line of the subscriber terminal 1-1 is idle,
The switch 2-1 of the subscriber terminal 1-1 is switched to the subscriber line test apparatus 8 side. After that, the central control unit 7 commands the subscriber line test unit 8 to perform the test.

Upon receiving this test command, the subscriber line test device 8 measures the voltage, resistance, capacity, etc. of the subscriber line. Then, the test result is A / D converted by the CPU 16 of the subscriber line test apparatus 8. The digitized test results are sent from the central control unit 7 via a data link (PC
It is transmitted to the main terminal 10 (using the spare bit of the M line). The central controller 13 of the main terminal station 10 determines that the result is the test result, fetches it, and informs the operation terminal 14. The operation terminal 14 displays the test results of the subscriber terminals 1-1 to 1-n on the display. In this way, the test command is issued from the operation terminal 14 to the subscriber terminals one after another to perform the test.

[0008]

However, in the above-mentioned conventional method, the subscriber line test equipment in the exchange, which was used before the introduction of the PCM transmission equipment, cannot be used and is attached to the conventional exchange. It was not possible to test the subscriber line from the subscriber test console. Further, in the conventional method, the exchange manages the subscribers by telephone numbers and the operating terminal manages by line numbers, which makes it difficult to check the numbers of both parties.

Therefore, an object of the present invention is to use the subscriber line test equipment of the conventional analog switch as it is,
The purpose is to enable subscriber line testing without changing the conventional maintenance system even after the line is introduced.

[0010]

In the present invention, FIG.
2, the main terminal station 10 and the remote child terminal station 6 are provided, and the subscriber terminals 1-1 to 1-n and the analog exchange 15 are connected by a PCM line, and the main terminal station 10 is connected. Includes a plurality of first subscriber analog interfaces 12-1 to 12-n and a first PCM multiplexer 11 as a first system unit, and a first central controller 1 as a first common unit 17.
3, the remote child terminal 6 has a plurality of second subscriber analog interfaces 3-1 to 3-3 as a second system unit.
-N and a second PCM multiplexer 4, a subscriber line test device 8 as a second common unit 5 and a second central control device 7, and a subscriber test operation to the analog exchange 15. In the subscriber line test system in the subscriber PCM transmission apparatus including the desk 20, the main terminal station 10 further includes a plurality of line test monitoring memories 21 as a first system unit,
The subscriber line test apparatus 8 measures the subscriber line test data on the side of the subscriber line terminal at a predetermined cycle, and the subscriber line test console 20
When a subscriber line test start is instructed by the subscriber line test data, the subscriber line test data is sent to the subscriber line test console 20 via the second central control unit 7, the PCM line, and the line test monitor memory 21.
There is provided a subscriber line test system adapted to be read out.

[0011]

When the test is started by operating the subscriber test console 20 of the analog exchange, first, the line test monitoring memory 21 in the main terminal 10 detects this. That is, the voltage applied between the tip (T) and the ring (R) is detected, and when the voltage falls below a predetermined level, it is judged that the test has started. When judged in this way, the line is connected to the test monitoring memory 21 and the test data which has already been measured and accumulated is supplied to the subscriber test console 20.

[0012]

1 is a block diagram of a subscriber PCM transmission apparatus as an embodiment of the present invention. This device is a remote child terminal (RT) 6 for receiving lines from subscriber terminals 1-1 to 1-n, a main terminal station 10 connected to the remote child terminal 6 by a PCM line, and an analog terminal for the main terminal station 10. It is equipped with an analog exchange connected by a line.

The remote terminal station 6 (RT: Remote Terminal) includes a plurality of first system units (SYS 1 to m) and one first system unit.
Of the subscriber terminals 1-1 to 1-1.
A switch 2-1 which receives an analog line from 1-n
2-n and a first subscriber analog interface (CH) 3-1 to 3-n for receiving one output of the switch
And a first PCM multiplexer (MUX) 4 that multiplexes the outputs of the subscriber analog interfaces 3-1 to 3-n, and the common unit 5 in each of the PCM multiplexers 4 has a subscriber analog interface 3 It is composed of a second central control unit (BANK CONT) 7 for multiplexing signals from -1 to 3-n and a subscriber line test device (SLT) 8 for testing a subscriber line. In addition, subscriber line test equipment (SL
T: Subcriber Line Test) 8 is a central control unit (CPU)
Includes 16. When the switches 2-1 to 2-n are switched, the subscriber line test device 8 causes the subscriber terminals 1-1 to 1-
The n side can be measured.

Main terminal 10 (COT: Central Office Ter
minal) includes a plurality of second system units (SYS1 ′ to m ′) and one second common unit 17, and each system unit outputs a second PCM multiplexer (MUX) 11 and its output. Receiving second subscriber analog interface (CH) 12-1 to
12-n and line test monitoring memory (LTM) 21
The common section 17 includes a second central controller (BANK CONT) 13. A subscriber test console 2 is provided on the analog exchange 15.
0 is added. Further, as shown in FIG.
TM21 is a subscriber line test detection circuit 31 and a data bank 3
2, a measurement data generation circuit 33, and a control unit 34.

The difference between this embodiment and the subscriber line test inspection method described in detail in the description of the prior art is that the LTM 21 is provided in each system of the main terminal station 10 and the operation terminal conventionally connected to the common section 17. Instead of 14, the subscriber test console 20 at that time, which consisted only of analog lines, was revived. The operation of this embodiment will be described below with reference to FIGS. 1 and 2, but the description of the same parts as those of the prior art will be omitted.

First, when the test is started by operating the subscriber test console 20 of the analog exchange 15, the main terminal 10
The subscriber line test detection circuit 31 of the LTM 21 inside detects the voltage applied between the chip (T) and the ring (R) in the line, and when the voltage becomes below a predetermined level, it is judged that the test is started. When the LTM21 judges in this way, the TST relay is operated and the line is connected to the measurement data generating circuit 3
Connect to 3. The measurement data generation circuit 33 generates data based on the measurement data that has already been measured and stored in the data bank 32.

The measured data is measured by switching the switches 2-1 to 2-n in the subscriber line test apparatus 8 at regular intervals when the line is not in use.
6 through the PCM multiplexer 7, the data link, and the PCM multiplexer 11, and the LT.
It is stored in the data bank 32 of M21. LTM2
The control unit 34 in 1 controls the above operation. Transmission of test data on the data link is performed using spare bits on the PCM line.

In the above description of the embodiment, the measurement data generation circuit 33 stores the test data measured at regular intervals in the data bank 32 and generates the data based on the test data. It is also possible to immediately perform a subscriber test by the subscriber line test apparatus 8 when the generation circuit requests data and use the real-time data as measurement data.

Further, in this embodiment, although the test start is instructed by the subscriber line test detection circuit 31, it is directly started from the subscriber test console 20 of the analog exchange 15 or the exchange control unit (not shown). It is also possible to start the test upon receiving a command. In this case, it is necessary to add the circuit shown by the broken line in FIG. In addition, the measurement data generating circuit is used as a channel (subscriber analog interface 12-1 to 12-1).
2-n), it becomes easy to perform a subscriber test by the subscriber line test device 8 and immediately operate the measurement data generation circuit, and the data can be sent without waiting for the test start from the analog exchange. Can occur. In this case, the subscriber line test detection circuit 31 and the data bank 32 for accumulating data are unnecessary.

[0020]

According to the present invention, the subscriber line test apparatus of the conventional analog switch can be used as it is, and the subscriber line test can be performed after the introduction of the PCM line without changing the conventional maintenance system. .

[Brief description of drawings]

FIG. 1 is a block diagram of a subscriber PCM transmission apparatus as an embodiment of the present invention.

FIG. 2 is a block diagram showing details of a line test monitoring memory in FIG.

FIG. 3 is a block diagram of a subscriber-based PCM transmission device that uses a conventional method.

[Explanation of symbols]

 1-1 to 1-n ... subscriber terminal 2-1 to 2-n ... switcher 3-1 to 3-n ... subscriber analog interface 4 ... PCM multiplexer 5 ... common unit 6 ... remote child terminal 7 ... Central control device 8 ... Subscriber line test device 10 ... Main terminal 11 ... PCM multiplexing device 12-1 to 12-n ... Subscriber analog interface 13 ... Central control device 14 ... Operating terminal 15 ... Analog switch 16 ... CPU 17 ... Common part 20 ... Subscriber test operation console 21 ... Line test monitoring memory 31 ... Subscriber line test detection circuit 32 ... Data bank 33 ... Measurement data generation circuit 34 ... Control part

Claims (1)

[Claims] 1. A main terminal station (10) and a remote child terminal station (6) are provided, and subscriber terminals (1-1 to 1-n) and an analog exchange (15) are connected by a PCM line. , The main terminal (10) includes a plurality of first system units as a first system unit.
Subscriber analog interface (12-1 to 12-
n) and a first PCM multiplexer (11),
The remote child terminal (6) has a plurality of second subscriber analog interfaces (3-1 to 3-3) as a second system section. -N)
And a second PCM multiplexer (4), a subscriber line test device (8) as a second common unit (5), and a second central controller (7), the analog switch Subscriber test console (20) in (15)
In the subscriber line test method for a subscriber PCM transmission device comprising: a main line terminal (10), further comprising a plurality of line test monitoring memories (21) as a first system unit, The device (8) measures the subscriber line test data on the side of the subscriber line terminal at a predetermined cycle, and when the subscriber line test start (20) instructs the subscriber line test start, the subscriber line test is started. The data is transferred to the second central controller (7) and the PCM.
A subscriber line test system for reading out to the subscriber test console (20) through a line and the line test monitoring memory (21).