JPS6145910B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a local tandem connection testing system.

In general, electronic exchanges have functions such as trunk function tests and automatic connection tests to prevent failures, regardless of whether they are for local or long-distance use.

For a local tandem connection test, it is necessary to create a test connection path from the incoming trunk of the tandem exchange to the outgoing trunk via the trunk link network. However, currently, subscriber exchanges only have the ability to test connections via line link networks for both the originating and terminating systems, and the trunk-to-trunk connections via trunk link networks. Tests have not been carried out on this, and since the long-distance relay exchange is a 4-wire system, the trunk-to-trunk test method for a 4-wire exchange is applied as is to a 2-wire local tandem exchange. This is particularly unreasonable because the line configuration, that is, the uplink and downlink lines, are separated and the test method is also confirmed separately, so the above-mentioned local tandem connection test has not been conducted at present.

SUMMARY OF THE INVENTION An object of the present invention is to provide a test method that allows easy exchange of local tandem connection tests in which two-wire exchange is performed.

The figure is a block diagram of one embodiment of the present invention. The figure shows an accumulation program-controlled local tandem switching system.
This shows the relay method of the MS. TLN is the trunk link network, OGT ₁ to _{OGT n} are the outgoing trunks, ICT ₁ to ICT _o are the incoming trunks, OST ₁ and OST ₂ are the outgoing trunks, and CC is the central control unit. STF indicates monitoring test equipment, TST OGT indicates outgoing trunk for testing, TSTICT indicates incoming trunk for testing,
OTL is a test terminal for transmission. The above trunks are all 2-wire type, and there is also a test terminal for outgoing calls.
OTL is also for 2 wires. Note that parts that are less relevant to understanding the present invention are omitted.

First, when testing outgoing trunks OGT ₁ to OGT _n , a test command is sent by the central controller CC to the monitoring test equipment STF, and the outgoing test terminal OTL is sent to the monitoring test equipment STF.
Information, numeric information to be dialed in the test, and information specifying the outgoing trunk to be tested (one of OGT ₁ to OGT _n , for example OGT ₁ ) are typed in.

In the above exchange, when the test target outgoing trunk OGT ₁ is blocked under the control of the central controller CC, the test preparation completion lamp of the monitoring test device STF lights up. The operator confirms this and operates the start key.

The operator then operates the outgoing test terminal OTL off hook telephone key. This allows the test terminal for transmitting
A loop is created for OTL. The operator dials the dial number specified above.

The dialed digit information is sent via the scanning device to the central control unit CC and stored therein, as in the case of a normal connection. Test output trunk TST OGT is electric key K
Test trunk connected via TSICT
is started with. The outgoing sender OST ₂ is connected to the test outgoing trunk TST via route 1 of the trunk link network TLN under the control of the central controller CC.
Connected to OGT and output trunk TST for testing
The above dialed numbers are sent via OGT, and these dialed numbers are sent to the test trunk via telephone key K.
Available at TST ICT. This dial information is sent to and stored in the central controller CC in the same way as when connecting a normal call. After the transmission of the dialed digits is completed, the outgoing test terminal OTL is connected to the test TST OGT via route 2 of the trunk link network TLN.

Next, the specified test target output trunk
OGT ₁ is connected to outgoing sender trunk OST ₁ via path 3 of trunk link network TLN, and the dialed digits are sent from OGT ₁ to the other station based on control information from central controller CC. When the sending of the dialed digits is completed, the above route 3 is released, and the test entry trunk TST is connected via route 4.
The connection between the ICT and the test target outgoing trunk OGT ₁ is set up.

At the other party's station, it is connected to an automatic connection test trunk ACTT (not shown) using the sent dial digits and using the normal call connection procedure. As a result, the automatic test trunk ACTT returns a ringback tone. This ring back tone reaches the monitoring test equipment STF from the other station through the test target outgoing trunk OGT ₁ , route 4 test incoming trunk TST ICT telephone key K, test outgoing trunk TST OGT, route 2, and terminal OTL. monitoring test equipment
The STF has an automatic response circuit connected to the terminal OTL, which automatically responds to the ringback tone, and further sends a dial tone from the automatic response circuit to the opposite station along the above-mentioned route.

The partner station automatic connection test trunk ACTT receives the dial tone, determines it as a recovery instruction, and
Sends a recovery instruction confirmation signal.

In the automatic response circuit of the monitoring test equipment STF,
Verify this, release the connection above, and exit trunk
Finish the OGT ₁ exam.

If the trunk OGT ₁ under test is normal, the above test process will be fully executed and confirmed, but if the connection is not performed correctly or there is a problem with the ringback tone or dial tone transmission function, the above automatic A fault can be determined by a response circuit. Other types of ring back tone and dial tone signals may also be used.

Furthermore, when testing the incoming trunks ICT ₁ to ICT _o , switch the switch key K of the monitoring test device STF from the position shown in the figure.

A test command is sent from the central controller CC to the monitoring test equipment STF, and the outgoing test terminal OTL information,
Numerical information to be dialed in the test, trunk to be tested (one of ICT ₁ to _{ICT o} , e.g.
Information specifying the ICT _o ) is typed in.

In the above-mentioned exchange, when the test target trunk ICT _o is blocked under the control of the central controller CC, the monitoring test preparation completion lamp is lit. The operator inserts the connection piece P into the ammunition S _o corresponding to the trunk ICT _o to be tested, disconnects the relay line from the other station, and connects the other station to the other station by, for example, connecting earth air. Blocked (make busy) and also monitors the line on the ICT _O side of the trunk entering the test target
Connect to STF and connect to test output trunk TST OGT.

The operator confirms that the lamp is lit and the connecting piece P is inserted, and then operates the start key.

The operator then operates the outgoing test terminal OTL off-hook telephone key to create a loop for the terminal. Then dial the specified dial digits above.

The above dialed digit information is sent to the central control unit CC via the scanning device as in the case of a normal connection.
I remember it. The test output trunk TST OGT is activated together with the test target input trunk ICT _o connected via the electronic key K and the connector P. Out sender OST ₂
is connected to the test outgoing trunk TST OGT via route 1 of the trunk link network TLN under the control of the central controller CC, and
The above dialed digits are sent from the TST OGT via the telephone key K, connector P, and ammunition S _o , and these dialed digits are received by the test target trunk ICT _o .

This dialing information is sent to and stored in the central controller CC, just as in the case of a normal connection. After sending out the dialed digits, the outgoing test terminal OTL is connected to the test outgoing trunk TST OGT via path 2 of the trunk link network TLN.

Next, an empty outgoing trunk for the partner station to which the automatic connection test trunk ACTT (not shown) is connected, e.g., outgoing trunk OGT ₁ , is connected to the outgoing sender trunk OST ₁ via path 3, and the above-mentioned The dialed digits are sent from the outgoing sender OST ₁ to the partner station via the outgoing trunk OGT ₁ .

When the transmission of the dialed digits is completed, route 5 of the trunk link network TLN is set up under the control of the central controller CC, and the trunk
OGT ₁ is switched from the outgoing sender trunk OST ₁ to the incoming trunk ICT _o to be tested.

At the other station, the above outgoing trunk OGT ₁ is connected using the sent dial digits and the normal connection procedure.
Connect to the automatic connection test trunk ACTT.

Therefore, the outgoing test terminal OTL is the connection path of route 2 of the trunk link network TLN, the test outgoing trunk TSN OGT, the electronic key K, the connector P, the ammunition S _o , the test target incoming trunk ICT _o , and the route 5. connection path, outgoing trunk OGT ₁ is connected to the automatic connection test trunk ACTT via the trunk line, trunk link network of the other station, etc., and the monitoring test equipment
Signals similar to those described above are exchanged with the automatic response circuit connected to the outgoing test terminal OTL during STF, and the connection path including the incoming trunk ICT _o and its function (signal continuity) are tested. will be carried out.

Since the test method according to the present invention is configured as described above, it is possible to perform a test that is equivalent to or better than a test via LLN such as a test of a local exchange or a 4W test of a toll exchange. Therefore, in a local tandem connection using two-wire switching, connection tests between the incoming and outgoing trunks of the tandem exchange, trunk function tests, and search and repair such as troubleshooting can be easily carried out.

[Brief explanation of the drawing]

The figure is a block diagram of one embodiment of the present invention. MS...local tandem switch, TLN...trunk link network, OGT ₁ ~ OGT _n ... outgoing trunk, ICT ₁ ~ ICT _o ... incoming trunk, CC... central control unit, STF... monitoring test equipment, K...Telephone key, TSTOGT...Test trunk, TSTICT
...Test trunk, S ₁ ~ _{S o} ... Ammunition, P...
…Connector, OTL…Test terminal for transmission.

Claims (1)

[Claims] 1. A monitoring test device is provided via the test outgoing trunk and the testing incoming trunk to the trunk link network of the storage program controlled local tandem two-wire exchange that accommodates the incoming and outgoing trunks, and Using a test trunk that automatically connects to the other side of the exchange, from the monitoring test equipment, via the test incoming trunk and the test target outgoing trunk, or through one outgoing trunk from the test target incoming trunk, A connection path to the automatic connection test trunk is created using the same procedure as for a normal call connection, and signals are transmitted between the automatic response circuit of the monitoring test equipment and the automatic connection test trunk via the connection path. A connection test method for a local tandem, characterized by carrying out a connection test from an incoming trunk to an outgoing trunk of a local tandem exchange, and a functional test of the outgoing and incoming trunks.