JPS6237861B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a subscriber line testing system in an exchange.

In the conventional subscriber line testing method at an exchange, in order to confirm whether the subscriber line is reliably connected to the subscriber under test, the relay system diagram using the conventional method shown in Figure 1 is used. , Transfer the TEL number of the subscriber under test from the subscriber line testing device LTF to the common control device CM, convert the number into the address of the TEL point of the subscriber under test in the number group NG, and connect the point and subscriber line. The address point of the test equipment LTF is the main link by the common control device CM.
Control and connect ML, then subscriber line testing equipment
The LTF called the subscriber's telephone number and either had a tester who had gone to the subscriber's house to be tested answer the call in advance, or conducted the test by having a person at the subscriber's house answer the call. . However, it is difficult for the tester to visit each subscriber's home to be tested, and it is not desirable in terms of service to have to call someone at the subscriber's home each time a test is conducted.

SUMMARY OF THE INVENTION An object of the present invention is to solve these drawbacks and provide a subscriber line testing method that allows a subscriber line testing device to unilaterally confirm the line connection with the subscriber under test. .

According to the present invention, a subscriber line testing device is provided;
In a subscriber line testing method in which a subscriber line is tested from an exchange to a subscriber terminal, the subscriber terminal is sent from the subscriber line testing equipment to a level that does not cause the bell of the subscriber terminal to ring, and a subscriber number transfer circuit that is activated by an activation signal set to a frequency and transfers its own number to the subscriber line testing device using an alternating current signal; The subscriber line testing device has an activation signal transmission/output circuit to be activated and a subscriber number reception/display circuit, and the subscriber line testing device activates the subscriber number transfer circuit when the subscriber line is connected to the subscriber under test. A subscriber line test in an exchange, characterized in that connection to the subscriber under test is confirmed by receiving and displaying the subscriber number in the subscriber number reception display circuit and verifying the subscriber number. method is obtained.

Next, a subscriber line testing method according to the present invention will be explained with reference to the drawings.

FIG. 2 shows a relay system diagram to which the subscriber line test system of the embodiment according to the present invention is applied. In the figure, the subscriber number transfer circuit SDET is the subscriber terminal
When it receives an activation signal from the subscriber line testing equipment LTF for TEL, it automatically starts up and transfers its own number to the subscriber line testing equipment LTF using an AC signal. In addition, subscriber line testing equipment
The LTF is provided with a circuit SDREC that sends out an activation signal to activate the subscriber number transfer circuit SDET and displays the reception of the subscriber number. When testing a subscriber line, when the line is connected to the subscriber under test, the subscriber number transfer circuit SDET is activated by sending a start signal and the subscriber number reception display circuit SDREC, and the transferred subscriber number under test is transmitted. By displaying and verifying the reception, it is possible to confirm that the connection to the subscriber under test is secure.

FIG. 3 shows a specific configuration example of the activation signal sending and subscriber number reception display circuit SDREC (hereinafter simply referred to as reception display circuit) in FIG. 2, and FIG. 4 similarly shows the subscriber number transfer circuit SDET. This shows a specific example of the configuration. The operation of these circuits will be explained with reference to the time chart in Figure 5. Connection to the subscriber under test TEL is performed using the conventional method as described above. Instead of calling, the subscriber line test equipment LTF instantaneously activates the T1 relay of the reception display circuit SDREC, and the SDET activation signal ₁ is sent from the activation signal oscillator OSC-M in order to activate the subscriber number transfer circuit SDET. . In addition, the fifth
In the chart shown in the figure, thick lines indicate the operating status of each part, and detailed arrows indicate the operating order. In the subscriber number transfer circuit SDET, when the activation signal receiver REC-S receives the signal ₁ , the timer circuit TIM is activated. When the timer TIM confirms that the signal ₁ has been continuously input for a predetermined period of time, it is assumed that the SDET activation signal has arrived. Next, when ₁ stops, the shift pulse generating circuit SPG is started, and at the same time, the relay T3 is operated to switch the lead to the accession number oscillators OSC-A to OSC-E. The shift pulse generation circuit SPG sends pulses at regular intervals to the gate shift circuit GSC-S. Gate shift circuit GSC−
S sequentially operates gate relays GA, GB, GC, GD, and GE according to pulses from shift pulse generation circuit SPG. Gate relay GA, GB, GC, GD,
By the operation of the GE, frequency signals _a , _b , _c , _d , _{and e} corresponding to the subscriber numbers to be tested are sequentially sent out from the subscriber number oscillators OSC-A to OSC-E, respectively.

On the other hand, on the reception display circuit SDREC side, relay T
1 is restored, the subscriber line testing equipment LTF controls the relay T2 to operate.
Operation of relay T2 switches the lead to subscriber number receiver REC-M. subscriber number receiver
REC-M uses a frequency signal corresponding to the subscriber number under test sent from the subscriber number transfer circuit SDET.
Receive _a , _b , _c , _d , _e in sequence. The subscriber number receiver REC-M receives received signals _a , _b , _c ,
The gate shift circuit GSC-M is controlled according to _{d and e} , and the gate relays GA to GE are operated in sequence, and the received signals _a , _b , _c , _d , and _e are converted to the subscriber number under test and the display circuit IND and display elements A, B, C, D, and E. Therefore, by comparing the displayed number with the number of the subscriber under test, it is possible to confirm whether or not the intended subscriber under test has been reliably connected.

In addition, in the above embodiment, the signals handled are
₁ , _a , _b , _c , _d , _e are subscriber telephones
Naturally, the level and frequency are selected so that the TEL bell does not ring, and each element shown in the figure can all be constructed using known techniques.

As is clear from the above explanation, according to the present invention, the tester does not have to go to the subscriber's house under test, and the tester does not have to bother the person at the subscriber's house. By simply operating the subscriber line testing device, it is possible to confirm that the terminal of the subscriber under test is securely connected, which has a significant effect on improving maintenance and services.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a relaying method to which a conventional subscriber line testing method is applied, FIG. 2 is a diagram showing a relaying method to which the subscriber line testing method of the embodiment of the present invention is applied, and FIG. 4 is a diagram showing a specific configuration example of the activation signal sending and subscriber number reception display circuit in FIG. 2, FIG. 4 is a diagram showing a specific configuration example of the subscriber number transfer circuit in FIG. , is a time chart illustrating the operating state of the circuit in FIGS. 3 and 4. FIG. In addition, in the figure,
TEL is the subscriber telephone, ML is the main link of the exchange,
CM is the exchange common control device, NG is the exchange number group, LTF is the subscriber line testing device,
SDREC is a start signal sending and subscriber number reception display circuit, SDET is a subscriber number transfer circuit, OSC-M
is the SDET start signal transmitter, T1 is the OSC-M connection relay, t1 is the contact of relay T1, REC-M is the subscriber number receiver, GSC-M, GSC-S are the gate shift circuits, IND is the subscriber number display Circuits A, B,
C, D, and E are each element of the subscriber number display circuit;
GA, GB, GC, GD, GE are gate relays, ga,
gb, gc, gd, ge are gate relay contacts, REC
-S is SDET start signal receiver, TIM is timer circuit, SPG is shift pulse generation circuit OSC-A,
OSC-B, OSC-C, OSC-D, OSE-E are subscriber number oscillators, T3 is REC-S and OSC-A~
Switching relay E, t3 is a contact point of relay T3.

Claims (1)

[Scope of Claims] 1. In a subscriber line testing method that includes a subscriber line testing device and tests a subscriber line from an exchange to a subscriber terminal, the subscriber terminal is equipped with the subscriber line testing device. The subscriber number transfer circuit is activated by an activation signal sent from the subscriber terminal and set at a level and frequency that does not ring the bell of the subscriber terminal, and transfers the subscriber's number to the subscriber line testing device using an alternating current signal. , the subscriber line testing device has an activation signal sending circuit for activating the subscriber number transfer circuit and a subscriber number reception display circuit, and the subscriber line testing device transfers the subscriber line to the subscriber under test. When the subscriber number is connected, the subscriber number transfer circuit is activated, and the subscriber number is received and displayed by the subscriber number reception and display circuit, and the connection to the subscriber under test is confirmed by checking. A subscriber line testing method in an exchange, characterized by the following.