JP2913888B2 - Manual test method for direct signal line interface trunk - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manual test method for a direct signal line interface trunk. The direct signal system is a signal system for the line that arrives at the manual table used in common exchange switches, etc., and is rarely used at present with the development of electronic switches, but some are fire departments and police stations The interface trunk of the direct signal system remains as a manual base for the above. Generally, a trunk in an exchange is difficult for a maintenance person to find even if a failure occurs, and the number of trunks is large. For this reason, it is necessary to detect a failure early by conducting a test periodically. However, since the selection signal cannot be transmitted in the case of the conventional direct signal line interface trunk, there is only a manual test using a device that is actually operated in opposition, such as a manual table. This is in a state where smooth maintenance work cannot be performed because a general table and a test call cannot be distinguished at the manual table and a preliminary meeting with an opposing manual table operator is required. For this reason, a method of performing a manual test of the trunk only in the local exchange is required.

[0002]

2. Description of the Related Art FIG. 5 shows a connection block diagram of a conventional manual test method for a direct signal line interface trunk.
In the figure, 21 is a test stand, 22 is a direct signal line interface trunk, 23 is an opposing manual stand, 24 is an electronic exchange, 25
Indicates an exchange.

[0003] The electronic exchange 24 is a digital exchange for exchanging connections between subscriber telephones and relay stations. The test stand 21 is connected to the exchange 24 by an analog trunk, and the direct signal line interface trunk 22 as a trunk to be tested is also an analog trunk, and is connected to the actual opposed manual stand 23 by a trunk line in an analog direct signal system. ing. The manual stand 23 is a manual stand such as a fire department and is directly connected to the trunk 22 on a one-to-one basis. If there are a plurality of manual stands 23, the stand 24 is connected to the exchange 24 by a plurality of trunks 22.

[0004] A maintenance person makes a call from the test stand 21, connects the test stand 21 and the trunk 22 by the exchange 24, and activates the manual stand 23. Thereafter, after the operator responds from the manual table 23, the maintenance person of the test table 21 confirms the normality of the direct signal type line interface trunk 22 by confirming the call with the operator of the manual table 23, disconnecting operation and the like.

[0005]

In the conventional manual test method for the direct signal line interface trunk, the destination is a manually-operated manual table and it is not possible to discriminate between a general call and a test call. A preliminary meeting was required. In addition, due to the above-described test method, there has been a problem that the holding time of the manual stand becomes long, and the call loss rate of emergency calls such as police and fire calls increases. Further, in the absence of a manual table operator, such as at midnight, the maintenance personnel could not freely test the trunk.

An object of the present invention is to perform a manual test by turning back a trunk in a local exchange without calling a manual table.

[0007]

FIG. 1 is a block diagram showing the principle configuration of a manual test system for a direct signal type line interface trunk according to the present invention. In the figure, 1 is a test stand, 2 is a trunk under test (direct signal line interface trunk), 3 is a test trunk drop-in device, 4 is a return test trunk,
5 is a memory for generating a selected numeral, 6 is an exchange, 7 is a manual table,
8 indicates an exchange.

The test stand 1 has an outgoing side trunk and an incoming side trunk, the trunk under test 2 is normally connected to the manual stand 7 by a direct signal line interface, and the test trunk drop-in device 3 is an exchange. The trunk line under test 2 is switched from the trunk under test 2 to the manual table 7 in response to a trunk line pull-in request from the side 6, and the trunk under test 2 and the loopback test trunk 4 are connected. The loopback test trunk 4 has an interface of a direct signal system equivalent to the opposite trunk of the trunk under test 2. The selected numeral generation memory 5 is a memory for generating and supplying a numeral for selecting the receiving trunk of the test stand 1 to the return test trunk 4.

[0009]

FIG. 2 shows a processing flowchart of the present invention. In the figure, (1) a maintenance person designates a trunk 2 to be tested from a test stand 1 and issues a trunk wire drop-in request to a test trunk wire drop-in device 3. (2) From the test stand 1, confirm that the trunk line has been pulled in. (3) Receive the test special number dial from the calling side trunk of test stand 1. (4) In the exchange 6, the test special number is received and the originating trunk of the test stand 1 and the trunk under test 2 are connected. At this time,
The trunk under test 2 can transmit only the start signal. (5) The number of the receiving-side trunk of the test stand 1 is obtained from the memory for generating the selected numeral 5 corresponding to the return test trunk 4 that has received the activation signal transmitted from the trunk under test 2. (6) In the exchange 6, the return test trunk 4 and the receiving side trunk of the test stand 1 are connected by the obtained number. (7) After answering the trunk on the terminating side of the test stand 1, the test stand 1 performs a confirmation test such as a call, end call, disconnection, etc. (8) After the test is completed, a trunk line retraction request is made from the test stand 1 to the test trunk line drop-in device 3 to confirm that the test of the trunk under test 2 is completed.

[0010]

FIG. 3 shows a connection block diagram of an embodiment of the present invention. In the drawing, as in FIG. 1, 1 is a test stand, 2 is a trunk under test (direct signal line interface trunk), 3 is a test trunk drop-in device, 4 is a loopback test trunk, and 5 is a selection digit generation. Memory, 6 is exchange, 7
Denotes a manual table, and 8 denotes an exchange. Note that reference numeral 11 denotes a calling side trunk of the test stand, 12 denotes a receiving side trunk, and 13 denotes a trunk lead-in request trunk.

When the maintenance person designates the trunk 2 to be tested from the numeric keypad of the test stand 1, if the trunk is in use, the trunk stands by a digital display indicating that the test is on standby. The test trunk wire drop-in device 3 is activated, and the trunk under test 2 is connected to the loopback test trunk 4. Assuming that the test special number from the calling side trunk 11 of the test stand 1 is "999", the test special number "999" is stored in the memory 5 for generating the selected numeral of the exchange 6 in correspondence with the return test trunk 4. The turn-back test trunk 4 is connected to the receiving side trunk 12 of the test stand 1 by an activation signal.
The maintenance person confirms the normality of the trunk under test 2 from the test stand 1 by performing a test such as a call tone (calling → calling), a call tone (calling → calling), disconnection (calling side), disconnection (calling side).

FIG. 4 shows a processing flowchart of the test apparatus incoming call processing method of this embodiment. This shows a processing flow for obtaining the number "999" of the receiving side trunk 12 of the test stand 1 from the selected number generating memory 5 corresponding to the return test trunk 4 which has received the start signal transmitted from the trunk under test 2. (11) The number of the receiving side trunk 12 is obtained from the selected numeral generation memory 5 corresponding to the return test trunk 4. (12) Check whether there is a called number or not. (13) If there is no called number, wait for reception of the selected digit from trunk under test 2. (14) If there is a called number, the obtained called number is translated to obtain the called-side trunk 12 of the called device, ie, the test stand 1. (15) Check whether the translation result of the called number is OK. (16) If the translated result of the called number is NG, perform abnormal processing. (17) If the translation result of the called number is OK, the destination device, that is, the destination trunk 12 of the test stand 1 is activated. (18) Terminate the test device receiving process and move to the test means from the test stand 1.

[0013]

According to the present invention, the receiving device can be arbitrarily specified by the contents of the memory for generating the selected digits, so that even in the case of a direct signal line interface trunk which cannot transmit the selected digits, the trunk can be manually tested in its own exchange. Can be performed.
Therefore, the loss rate of police and fire calls is reduced, and smooth regular maintenance can be realized without a prior meeting.

[Brief description of the drawings]

FIG. 1 is a diagram showing the principle configuration of the present invention.

FIG. 2 is a processing flowchart of the present invention.

FIG. 3 is a connection block diagram of the embodiment.

FIG. 4 is a processing flowchart of an embodiment.

FIG. 5 is a connection block diagram of a conventional example.

[Explanation of symbols]

1,21 Test bench 2,22 Trunk under test (direct signal line interface trunk) 3 Test trunk drop-in device 4 Turnback test trunk 5 Memory for selecting digit generation 6,24 Switch 7,23 Manual table 8,25 Switch Station 11 Outgoing trunk on test stand 12 Incoming trunk on test stand 13 Trunk request request trunk (1) to (8), (11) to (18) Processing flow steps

────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-63-42557 (JP, A) JP-A-57-73556 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) H04M 3/26

Claims (1)

(57) [Claims] 1. An exchange having a test bench (1) having an originating trunk and a destination trunk, and a trunk under test (2) which is normally connected to a manual bench (7) by a direct signal line interface. In (6), a trunk line from the trunk under test (2) to the manual table (7) is switched in response to a trunk line pull-in request from the test bench (1), and the trunk under test (2) and the loopback test trunk ( And a trunk under test (2).
A return test trunk (4) having an interface of a direct signal system equivalent to the opposite trunk of (1), and a selection number for generating a number for selecting the destination trunk of the test stand (1) for the return test trunk (4) A memory for generation (5) is provided to connect the trunk on the test stand (1) via the trunk under test (2) and the loopback test trunk (4) from the originating trunk on the test stand (1). A manual test method for direct signal line interface trunks.