JPH06169344A - Jumper connecting device for subscriber test - Google Patents

Abstract

PURPOSE:To complete the accurate connection of jumpers in the small working manhour and also to minimize the influence of the disconnection troubles by using a common line connected to a tester and plural switches provided against the selectors respectively. CONSTITUTION:This jumper connecting device 20 consists of a common line 31 connected to a subscriber tester 17 and plural switches 32 provided corresponding to the selectors 12 respectively. One of both contacts 33 of each switch 32 is connected to the line 31, and the other contact 34 is connected to the corresponding selector 12. The line 31 and the group of switches 32 are previously built in. Thus it is possible to omit a job that laps or solders a jumper line to a designated pin P. So that a jumper connecting job is complete just with transmission of a switch control signal SC1. The switches 32 are closed so that a closed loop is formed by a series of concatenated selectors 12 and the line 31 when the switches 32 are opened and closed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a subscriber test jumper connecting device which is used in combination with a subscriber tester to perform a subscriber test in an exchange. The subscriber test usually includes a test on the side of each subscriber circuit and a test on the side of each subscriber trunk line, which are separately performed. In this case, since it is uneconomical to provide a subscriber tester for each subscriber, a predetermined group of subscribers can share one subscriber tester. Predetermining the above-mentioned group of subscribers is called grouping, and a subscriber test jumper connecting device (hereinafter also simply referred to as jumper connecting device) is installed in each exchange for this grouping. Although this grouping is set when the switching center is started up, it may be changed depending on the situation thereafter.

[0002]

2. Description of the Related Art FIG. 8 is a diagram showing a conventional jumper connecting device and its surroundings. In the figure, a block indicated by reference numeral 20 is a subscriber test jumper connection device. In the vicinity thereof, a subscriber tester 17 that individually tests each subscriber and a plurality of (for example, 128) subscriber circuits (Subscriber circuits) that are multi-drop connected to the common bus 13 are provided.
r Line Circuit) 11 and a large number of subscriber circuit units 10 each composed of a selector (SELector) 12 connected to one end of the common bus 13 and connected in cascade through a plurality of predetermined selectors 12 in sequence. There is a group of subscriber units 10 that are connected to each other, and a subscriber test jumper connection device 20 is connected to the tester 17 so that the tester 17 is shared.

Normally, the selector switch 14 in each selector 12 is open, and each subscriber circuit 11 is electrically disconnected from the subscriber tester 17 and the jumper connecting device 20. On the other hand, during the subscriber test, one unit of the group of subscriber circuit units 10 (four units are shown in the figure) shown in the figure is first selected and connected to the tester 17. This selection is made by closing the selector switch 14 in one of the four selectors 12. Furthermore, 12 belonging to the selected unit 10
Eight subscriber circuits 11 are selectively and sequentially selected and connected to the tester 17 via the jumper connection device 20.
A switch for selectively and sequentially selecting each subscriber circuit 11 is provided in each subscriber circuit 11 (see FIG. 4). A and B attached to each selector 12 are an upstream port and a downstream port, respectively.

By the way, although only four subscriber circuit units 10 are shown in the figure for simplification, the number of subscriber circuit units 10 is actually thousands or tens of thousands. In this way, the above-described grouping is performed on a large number of subscriber circuit units 10, and a group of subscriber circuit units 10 that share the subscriber tester 17 are shared.
(4 units in the example in the figure) are determined in advance. For this grouping, first, a subscriber test cable 15 is stretched, and the subscriber test cables 15 are connected to each other in a cascade connection via the group of selectors 12. Then, jumper wires 21 are laid on the group of selectors 12. Thus, the test by the tester 17 is executed for each subscriber belonging to the group of subscriber circuit units 10. This test is usually conducted at night. In the figure, “4” indicates a bundle of four signal lines. The four signal lines consist of a pair of subscriber relay lines and a pair of intra-station subscriber lines (described later).

[0005]

In the conventional jumper connecting device 20 shown in FIG. 8, for example, a jumper wire composed of a pair cable is lapped or soldered to a designated pin P. Therefore, there is a first problem that the man-hour required for jumper connection becomes large. Further, since the number of the above-mentioned pins reaches thousands or tens of thousands, there is no guarantee that the specified pin can be jumper-connected without error, and there is often an erroneous connection to a pin other than the specified pin. That is, there is a second problem that an accurate jumper connection cannot be sufficiently guaranteed.

Further, if a disconnection occurs in a part of the wiring for the subscriber test, there is a problem that the effect is often widespread. For example, when a disconnection occurs in a part of the cable 15 in FIG. 8, particularly in a part indicated by X, all the subscribers belonging to the subscriber circuit unit 10 in the second, third and fourth stages from the top in the figure. Fall into a test failure. Therefore, in view of the above problems, it is an object of the present invention to provide a jumper connecting device for a subscriber test which can complete an accurate jumper connection with a small number of man-hours and can minimize the influence of a disconnection accident. It is a thing.

[0007]

FIG. 1 is a diagram showing the basic configuration of a jumper connecting device according to the present invention. Note that the same reference numerals or symbols are given to the same components throughout the drawings. The jumper connection device 20 according to the present invention is
It is composed of a common line 31 connected to the subscriber tester 17 and a plurality of switches 32 provided for each selector 12, and one contact 33 of each switch 32 has a common line 3
1 and the other contact 34 is the corresponding selector 1
Connect to 2.

[0008]

In the jumper connecting device 20 according to the present invention, the common line 31 and the switch group 32 are incorporated in advance. Therefore, the conventional work of wrapping or soldering the jumper wire 21 to the designated pin is eliminated, and the jumper connection is completed only by sending the switch control signal SC1 by a command from the console, for example. This command includes the operation to instruct the code assigned to the specified switch. This operation can be done while checking the code on the monitor CRT, so not only can it be done in a short time, but a connection error can be prevented. There is almost no possibility.

Further, when the switch 32 is opened and closed, the switch 32 is formed so that a series of selectors 12 and a common line 31 connected in cascade form a closed loop.
Close. Referring to FIG. 1, the first stage switch 32
And the switch 32 of the fourth stage is closed, and the other switches 32 are open. Then, when the above disconnection accident (indicated by X) occurs, for the subscribers belonging to the subscriber circuit units 10 of the fourth, third and second stages,
The connection with the testing machine 17 is continuously maintained by the route shown by the counterclockwise arrow in the figure. After all, the effect of disconnection is minimized.

[0010]

FIG. 2 is a diagram showing an embodiment according to the present invention. In this embodiment, each of the switches 32 shown in FIG. 1 is realized by a relay switch 32. However, the description of each relay coil is omitted because it is well known. However, the switch control signal SC1 will be applied to the relay coil.

The relay switch (32) includes a transfer type first contact 43 (corresponding to the contact 33 in FIG. 1) and a second contact.
It consists of contacts 44 (corresponding to 34 in FIG. 1). FIG. 3 is a diagram showing another embodiment according to the present invention. In this embodiment, the second subscriber tester 18 is provided separately from the first subscriber tester 17.
And a second common line 35 connected to the second subscriber tester 18 is provided separately from the first common line 31, and the one contact 37 is provided separately from the first switch 32. A plurality of second switches 3 connected to the common line 35 of the two and the other contact 38 to each of the corresponding selectors 12.
6 and 6 are further provided.

There are various types of subscriber tests, and different test machines are often introduced. The jumper connecting device 20 shown in FIG. 3 deals with such a situation. Also in the embodiment of FIG. 3, the second switch 36 is closed so that a series of cascade-connected selectors 12 and the second common line 35 form a closed loop.

Below, a detailed example of each part will be supplemented. However, these detailed examples also apply to the above-described conventional example (FIG. 8). FIG. 4 is a diagram showing a connection portion of the subscriber circuit with the common bus. That is, this drawing shows a part of the subscriber circuit unit 10 in an enlarged detail. The common bus 13 consists of four signal lines, of which LCC + and LCC-
Is a pair of subscriber-side test lines, LCS + and LC
S- is a pair of exchange-side test lines. Each of the switches is connected to the illustrated switch group in the subscriber circuit 11 via the subscriber-side service line 13S and the exchange-side service line 13C. On the one hand (13S side), this switch group is connected to the corresponding subscriber telephones 19 through subscriber relay lines (a pair of so-called A and B lines) 16. On the other hand (13C side) of the above switch group, a so-called BOR is provided.
It connects to the network NW of the exchange through the SCHT function (power supply, coder / decoder, calling, overcurrent protection, etc.).

The network NW is mainly controlled by the call processor CPR and performs an outgoing call and an incoming call exchange work. Further, the switch control signal (SC) is output. This switch control signal can be automatically output or can be output from the console according to an instruction from the operator. Switch control signal SC3 of FIG.
Controls each contact of the illustrated switch group (comprising a relay contact group). The contact state in this figure represents a normal time (when a subscriber test is not in progress), and the subscriber circuit (SLC) 11 is not connected to the subscriber tester 17. That is, common bus 13
The subscriber telephone 19 is directly connected to the network NW through the subscriber circuit 11.

FIG. 5 is a switch state diagram when testing the subscriber telephone side, and FIG. 6 is a switch state diagram when testing the network side from the subscriber circuit. That is, in FIG. 5, the tester 17 and the telephone 19 side are connected via the subscriber side incoming line 13S. On the other hand, in FIG. 6, the tester 17 and the BORSCHT functional unit and the like are connected via the exchange side incoming line 13C.

FIG. 7 is a diagram showing the details of the selector. In the selector 12 belonging to the subscriber circuit unit 10 including the subscriber to be tested by the tester 17, the selector switch 14 consisting of relay contacts is a switch control signal. Close as shown by SC2. In the above description, a mechanical relay contact is used as the switch, but an electric semiconductor contact may be used.

[0017]

As described in detail above, according to the present invention, the conventional jumper connection, which requires a lot of man-hours and time, can be improved, and this can be done accurately and easily. Moreover, by closing the switches in two places, it is possible to suppress the spread of cutting accidents.

[Brief description of drawings]

FIG. 1 is a diagram showing a basic configuration of a jumper connecting device according to the present invention.

FIG. 2 is a diagram showing an embodiment according to the present invention.

FIG. 3 is a diagram showing another embodiment according to the present invention.

FIG. 4 is a diagram showing a connection portion of a subscriber circuit with a common bus.

FIG. 5 is a switch state diagram when testing the subscriber telephone side.

FIG. 6 is a switch state diagram when a network side is tested from a subscriber circuit.

FIG. 7 is a diagram showing details of a selector.

FIG. 8 is a diagram showing a conventional jumper connection device and its periphery.

[Explanation of symbols]

 10 ... Subscriber circuit unit 11 ... Subscriber circuit (SLC) 12 ... Selector (SEL) 13 ... Common bus 14 ... Selector switch 15 ... Subscriber test cable 16 ... Subscriber trunk line 17 ... Subscriber tester 18 ... Subscribe Person tester 19 ... subscriber telephone 20 ... subscriber test jumper connection device 21 ... jumper wire 31 ... common line 32 ... switch 33 ... one contact 34 ... other contact 36 ... common line 37 ... one contact 38 ... other Contact point 43 ... 1st contact point 44 ... 2nd contact point SC1, SC2, SC3 ... Switch control signal

Continued Front Page (72) Inventor Hisato Kawano 1015 Kamiodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture Fujitsu Limited

Claims (4)

[Claims] 1. A subscriber tester (17) for individually testing each subscriber, a plurality of subscriber circuits (11) each multi-drop connected to a common bus (13), and the common bus. Is provided on the subscriber side of an exchange including a large number of subscriber circuit units (10) composed of selectors (12) connected to one end of each of them, and is vertically connected through a plurality of predetermined selectors. In a subscriber test jumper connection device in which a group of the subscriber circuit units are jumper-connected so as to share the subscriber tester, a common line (31) connected to the subscriber tester,
A plurality of switches (3
2), wherein one contact (33) of each switch is connected to the common line and the other contact (34) is connected to the corresponding selector. apparatus. 2. A series of the selectors (1) connected in cascade.
2. The jumper connection device for subscriber test according to claim 1, wherein the switch (32) is closed so as to form a closed loop by 2) and the common line (31). 3. A second subscriber tester (18) separate from the first subscriber tester (17), the second subscriber separate from the first common line (31). A second common line (35) connected to the testing machine is provided, and apart from the first switch (32), one contact (37) is connected to the second common line and the other contact ( 38. The subscriber test jumper connection device according to claim 1, wherein 38) has a plurality of second switches (36) connected to each of the corresponding selectors (12). 4. A series of the selectors (1) connected in cascade.
2. The subscriber test jumper connection device according to claim 3, wherein the second switch (36) is closed so as to form a closed loop by 2) and the second common line (35).