JPH0365859A - Connection test equipment by charging object - Google Patents

Abstract

PURPOSE:To execute the connection test to all objects in all exchange units by one person by providing a PB dial unit, a line concentration/distribution circuit dividing a dial signal into plural signals and a lamp lighting at line connection. CONSTITUTION:The equipment is provided with a PB dial unit 13 sending a required dial signal, a line concentration/distribution circuit 8 dividing a dial signal into plural signals, plural line connecting terminals receiving the divided dial signals, and lamps provided to each line connection terminal and lighting at the line connection. When a dial signal is sent from the PB dial unit 13, the signal is divided into plural signals by the line concentration/distribution circuit 8 and fed to each line connection terminal 1, fed to an exchange, a public telephone set or a general telephone set and the device connecting to the line is displayed by the lamp lighting. Then in the case of a public telephone set, the confirmation of coin deposition is implemented by using a coin deposition signal from the exchange. Thus, the job efficiency of the connection test is enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a charge-to-ground connection tester that saves labor in charge-to-ground connection tests in telephone exchange maintenance work.

[Conventional technology]

In the conventional charging area connection test, for each exchange unit,
The system connects both general and public telephones to each of the currently 14 billing locations, and confirms the normality of each billing status.

For this test, two workers (general and public) are required for each replacement unit, and the test is conducted for each unit housed at each exchange center.

[Problem to be solved by the invention]

Therefore, in an exchange that accommodates multiple units, (1) When conducted by a small number of people, the test must be repeated for each unit, which requires a long time and creates a mental burden due to a single task.

(2) In order to complete the project in a short time, "2 people (general and public) x number of units" will be required.

There were other problems.

In addition to this, coins are inserted and withdrawn from public telephones for each call during public class exams, so
This is a lot of work and has become a problem.

The purpose of this invention is to improve the work efficiency of connection tests, and to solve the problems of repetitive work for each replacement unit, operational problems, and labor (insertion and withdrawal of coins at public telephones) in conventional connection tests. This problem is solved by simultaneous transmission, which is a feature of this invention.

[Means to solve the problem]

The charging ground connection tester according to the present invention includes a PB dial unit that transmits a required dial signal, a convergence/distribution circuit that divides the dial signal into a plurality of parts, and a plurality of lines to which the divided dial signals are applied. It is equipped with a connection terminal and a lamp that is provided for each line connection terminal and lights up when the line is connected.

[Effect]

In this invention, when a dial signal is transmitted from the PB dial unit, it is divided into a plurality of parts by the convergence/distribution circuit and applied to each line connection terminal,
A public telephone or one added to a regular telephone and connected to a line indicates this by lighting a lamp. In the case of a public telephone, confirmation of coin storage is performed by a coin storage signal from the exchange.

[Embodiment] FIG. 1 is a circuit diagram showing an embodiment of the present invention, and is an example corresponding to two units. In this figure, 1 is a line connection terminal, 2 is a pseudo line resistor, and 3A.

3B is a hook switch, 4A, 4B are wire spring relays, 5A, 5B are wire spring relay contacts, 6
is a DC loop forming resistor, 7 is a DC blocking capacitor,
8 is a focusing/distributing circuit, 9 is a low frequency transformer, 10 is a preamplifier, 11 is a power amplifier, 12 is a speaker, 13 is a P
B dial unit, 14 is a low frequency transformer, 15 is a power amplifier, 16 is a low frequency transformer, 17A and 17B are a public reception detection circuit, a general reception detection circuit, 18 is a line selection switch, and 19 is a monitor level switching relay. be.

FIG. 2 shows details of the power amplifier 11.15 in the embodiment of FIG. 1, where C is a capacitor, IC is an operational amplifier, and R is a resistor.

FIG. 3 shows details of the preamplifier 10 in the embodiment of FIG. 1, where C is a capacitor, Tr is a transistor, and V
R is a semi-fixed resistor, and R is a resistor.

FIG. 4 shows details of the public reception detection circuit 17A and a circuit diagram of the frequency meter drive circuit 20 driven by the public reception detection circuit 17A. In this diagram, R is a resistor, C is a capacitor, ZD is a Zener diode, D is a diode, LEDp is a display diode, PC is a photocoupler, M is a relay, and m is its contact.
Tr is a transistor, and MET is a frequency meter.

FIG. 5 shows the details of the general reception detection circuit 17B, in which R is a resistor, LED is a display diode, ZD is a Zener diode, and D is a diode. In addition, the fourth
The Zener diode ZD in FIG. 5 is added for overvoltage protection from external lines. Further, the display diode LEDp, LED may be a lamp other than a diode.

FIG. 6 shows details of the power supply circuit used in this invention, where SW is a power switch, R is a resistor, D is a diode,
B is a varistor, Tr is a transistor, D is a diode,
LED is a light emitting diode.

FIGS. 7(a), (b), and (C) are a front view, a top view, and a rear view showing the overall external appearance of an embodiment of the present invention that is compatible with three units.

Next, the rotation operation shown in FIG. 1 will be explained.

The line of the charging ground connection tester according to the present invention is connected to the general and public class subscriber lines of each exchange unit by a line connection terminal 1. When installing this tester at your own station, connect it through the dummy line resistor 2, but if you install it at another station for consolidation etc., the line resistance of the trunk line will naturally be included, so the dummy line resistor 2 will be connected. Connect directly without passing through 2. In this state, when the general and public hook switches 3A and 3B of the hooking circuit are turned "ON" (connected), the corresponding wire spring relay 4A is activated.

4B operates, its wire spring relay contact 5A,
5B is closed, current flows through the DC loop forming resistor 6,
A DC loop is formed and a calling connection is made to the exchange. Subsequently, a transmission tone (DT) is sent from the exchange, and the transmission tone is passed through the DC blocking capacitor 7, the focusing/distributing circuit 8. Low frequency transformer9. Preamplifier 10. is heard by the speaker 12 via the power amplifier 11.

Next, the PB dial signal sent out from the PB dial unit 13 is transmitted to the low frequency transformer 14. Power amplifier 15.
Low frequency transformer 16. Through the focusing/distributing circuit 8, the general
Minutes are sent to all public lines (outgoing connection).

Next, when the other party (receiving call) answers, a response signal (in the general case) and a coin storage signal (in the public case) are received from the exchange, and these are detected by the public reception detection shown in Figures 4 and 5. The signal is received by the circuit 17A and the general reception detection circuit 17B.

The general reception detection circuit 17B shown in FIG. 5 is compatible with the general class, and detects a response (polarity reversal) signal using a diode D.
The response is displayed using a display diode LED.

For the public, this is done by the public receiving detection circuit 17A shown in FIG.
0, the relay M is operated, and its contact m drives the frequency meter MET.

In addition, if this outgoing connection is disconnected, the polarity of the line is not reversed, so the display diode LEDp in the public reception detection circuit 17A and the general reception detection circuit 17B
, LED, remains blinking without lighting up. In this case, only the line that was disconnected by the line selection switch 18 is left, the remaining lines are disconnected, and the connection test is performed again.

The monitor level switching relay 19 was provided because when monitoring (listening to) the PB dial sound and the receiving sound, there is a level difference in that the PB dialing sound is loud and the receiving sound is low. At the time of receiving tone, the preamplifier 10 is disconnected and the degree of amplification is reduced.
The volume is designed to balance the volume of the incoming call.

〔Effect of the invention〕

As explained above, the present invention includes a PB dial unit that transmits a required dial signal, a focusing/distribution circuit that divides the dial signal into a plurality of parts, and a plurality of line connection terminals to which the divided dial signals are applied. and a lamp that lights up when the line is connected, provided for each line connection terminal, so one person can test the connection of all replacement units to all ground locations, and the test can be completed in about 30 minutes. can.

Furthermore, if the frequency calculation is performed in a public class, there is no need to prepare coins, and the registered frequency can be seen at a glance without having to count the number of coins deposited (the sound of coins falling).

Furthermore, since there is only one tester, the numerous telephones that were previously connected to each test circuit are no longer necessary, and the installation space has also been improved.

Normally, in order to prevent self-billing, all business offices conduct connection tests for each charging area at some period, and
Even when updating files on electronic exchanges or revising rates,
Homogeneous connectivity testing is essential. Therefore, the amount of labor saved by the widespread use of the charging ground connection tester according to the present invention will be truly enormous when viewed nationwide.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing an embodiment of the present invention, and FIG. 2 is a circuit diagram showing an embodiment of the present invention.
The circuit diagram showing the details of the power amplifier in Fig. 1 and Fig. 3 are as follows.
The circuit diagram showing the details of the preamplifier in Fig. 1 and Fig. 4 are as follows.
Figure 5 is a circuit diagram showing details of the public reception detection circuit in Figure 3, Figure 6 is a circuit diagram showing details of the general reception detection circuit in Figure 3, and Figure 6 is the power supply circuit in Figure 3. FIGS. 7(a), 7(b), and 7(c) are a front view, a top view, and a rear view showing the overall appearance. In the figure, 1 is a line connection terminal, 2 is a pseudo line resistor, 3A,
3B is a hook switch, 4A, 4B are wire spring relays, 5A, 5B are wire spring relay contacts, 6
is a DC loop forming resistor, 7 is a DC blocking capacitor,
8 is a focusing/distributing circuit, 9 is a low frequency transformer, 10 is a preamplifier, 11 is a power amplifier, 12 is a speaker, 13 is a P
B dial unit, 14 is a low frequency transformer, 15 is a power amplifier, 16 is a low frequency transformer, 17A. 17B is a public reception detection circuit, a general reception detection circuit, 1
8 is a line selection switch, and 19 is a monitor level switching relay. Figure 7 Procedural amendment (voluntary) February 9, 1990

Claims (1)

[Claims] A PB dial unit that transmits a required dial signal, a focusing/distribution circuit that divides the dial signal into a plurality of parts, a plurality of line connection terminals to which the divided dial signals are applied, and a plurality of line connection terminals for each of the line connection terminals. A charging ground connection tester characterized by comprising a lamp that lights up when a line is connected.