CN205017322U - A interface converting device and 2M line capability test system for 2M line capability test - Google Patents

Abstract

The utility model discloses an interface converting device and 2M line capability test system for 2M line capability test, the device has the plain conductor of insulating coating, female head and two -way public head including quartzy head, two root zones, two plain conductor's one end all is connected with quartzy head, two plain conductor's the other end is connected with core and the shell of female head respectively, mother first with be used for being connected the first connection of two -way public affairs of 2M line of awaiting measuring. The utility model discloses an use the core and the shell of the female head of two plain conductor turn -on connection wares, use in 2M line capability test's interface converting device simple structure, and combine main tester and the remote testing ware of this interface converting device with the tester, in order to be applied to 2M line capability test system, the operation is thus simple, the adaptability of test environment has been increased, the test reliability has been improved simultaneously, the potential safety hazard that can directly get rid of transmission path, ensure electric power communication system, electric power system's safety and stability operation.

Description

Interface conversion device for 2M line performance test and 2M line performance test system

technical field

The utility model belongs to the technical field of communication, in particular to an interface conversion device and a 2M line performance test system for 2M line performance testing.

Background technique

The 2M line is the coaxial cable, also known as the E1 line, which is the connection cable of the E1 interface commonly used in the communication industry. One 2M is a PCM system, which is divided into 0 to 31 time slots (64Kb/s) 64*32=2048Kb /s, commonly known as 2M for miniature printing, can carry various services such as voice and packet switching.

In actual work, performance tests are often performed on the 2M line to determine whether there are quality problems such as open circuit, short circuit, and virtual connection in the 2M line. The more commonly used test method in the current work is to use a multimeter for testing. Since the 2M line is equivalent to two parallel wires, when the multimeter is adjusted to the resistance level, its equivalent circuit principle is shown in Figure 1, a and b represent the two ends of one of the wires in the 2M line, and c and d represent the 2M The two ends of the other wire in the line can be seen from the figure. In order to prove the goodness of the 2M line, it is necessary to test whether the two wires are open or short circuited. Therefore, at least 4 test operations are required, so that the test is relatively simple. cumbersome.

In addition, the longest 2M line is nearly 20 meters long, while the test lead line of the multimeter is only 110 cm, which is obviously insufficient. Although jumpers can be used as extension cables on site, the reliability is greatly reduced due to too many nodes and too long distances; and there are also big problems in the operation and communication between two people, which seriously affects the test time.

Therefore, the traditional multimeter test has too many operations and low efficiency, and when the field environment is complex, the shortcomings are obvious and the reliability is low.

Utility model content

Aiming at the technical problems of cumbersome, poor adaptability, and low reliability existing in the prior art for multimeter testing of 2M line performance, the utility model provides a 2M line performance test device that is easy to operate, which can improve the reliability and reliability of 2M line performance testing. environmental adaptability.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:

An interface conversion device for 2M line performance testing, including a crystal head, two metal wires with an insulating jacket, a female head and a bidirectional male head, one end of the two metal wires is connected to the crystal head, The other ends of the two metal wires are respectively connected to the core and the shell of the female head, and the female head is connected to the bidirectional male head for connecting the 2M line to be tested.

Preferably, the female head is a bayonet nut connector female head.

Preferably, the two-way male head is a bayonet nut connector male head.

Preferably, the crystal head is an RJ45 crystal head.

Preferably, the metal wire is a network wire.

A 2M line performance testing system, including the main tester and remote tester of the tester, also includes two above-mentioned interface conversion devices for 2M line performance testing, and the interface conversion device for 2M line performance testing It also has two interfaces for connecting with the 2M line to be tested and the main tester or remote tester respectively.

Compared with the prior art, the utility model has the beneficial effects that: the utility model uses two metal wires to conduct the core and the shell of the connector female head, so that the structure of the interface conversion device used for the performance test of the 2M line is simple, And the interface conversion device is combined with the main tester and remote tester of the tester to apply to the 2M line performance test system. The operation is simple and the adaptability of the test environment is increased. At the same time, it improves the reliability of the test, can directly eliminate the safety hazards of the transmission channel, and ensure the safe and stable operation of the power communication system and power system.

Description of drawings

Fig. 1 is the circuit principle diagram that multimeter in the prior art carries out 2M line performance test;

Fig. 2 is the schematic diagram of the test circuit of the 2M line performance test system in the utility model;

Fig. 3 is a block diagram of the 2M interface conversion device and the 2M line performance testing system in the utility model.

In the picture:

1-Crystal head; 2-Metal wire;

3-female; 4-two-way male;

5 - 2M line to be tested;

6-main tester; 61-near-end indicator light;

7-remote tester 71-remote indicator light.

detailed description

In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 3, the embodiment of the utility model discloses an interface conversion device for 2M line performance test, which includes a crystal head 1, two metal wires 2, a female head 3 and a bidirectional male head 4, two One end of the metal wire 2 is connected to the crystal head 1, and the other ends of the two metal wires 2 are respectively connected to the core and the shell of the female head 3, and the female head 3 is connected to the 2M line (coaxial cable) 5 for connecting to the Bi-directional male 4 connections.

In order to improve the reliability of the test, the female head 3 uses a BNC connector. The BNC connector is a connector for coaxial cables. The full name is Bayonet Nut Connector (the bayonet nut connector, which vividly describes the shape of this connector). Corresponding to the female head of the bayonet nut connector, the male head of the bayonet nut connector (BNC) is selected as the two-way male head 4, which can improve the matching degree of the connection between the male head and the female head 3.

Crystal head 1 uses an RJ45 crystal head to reduce costs.

The metal wire 2 has an insulating jacket, and may be, for example, a network cable.

A kind of 2M line performance testing system, it comprises the main tester 6 of measuring instrument, remote tester 7 and two interface conversion devices, the interface conversion device has respectively for being connected with the 2M line 5 (coaxial cable) to be tested and Two interfaces for main tester 6 or remote tester 7 to connect.

The line measuring instrument is generally used to test the telephone interface and the network interface. The line measuring instrument selected in this embodiment is an expert line measuring instrument (a relatively common small line measuring instrument). It is generally used when testing the connectivity of the tester, which includes a main tester 6 and a remote tester 7. In this embodiment, the expert line tester utilizes the main function of generating a signal at one end and feeding back a signal at the other end. The internal structure will not be repeated here.

The utility model carries out the performance test method to the 2M line through the 2M line performance test system. The 2M line 5 (coaxial cable) to be tested is respectively connected to the main tester 6 and the remote tester 7, and the toggle switch is ON for normal testing. Speed, S key for slow or manual testing. If the numbers of the two test terminals (main tester 6 and remote tester 7) flash from 1 to 8 at the same time, it means that the 2M line 5 to be tested is normal; if the numbers of the two test terminals are confused, it means the wiring method Wrong or crossed wire connection; if one or more lights are off, it means that one or more wires are not connected properly.

The circuit schematic diagram of the 2M line performance test using the 2M line performance test system of the present invention is shown in Figure 2, a, b represent the two ends of one of the wires in the 2M line, c, d represent the other of the 2M line It can be seen from the figure that the performance of the 2M line is judged by the display of the far-end indicator light 71 on the remote tester 7 connected to the 2M line and the near-end indicator light 61 on the main tester 6. The results are clear at a glance and easy to judge.

The above embodiments are only exemplary embodiments of the utility model, and are not used to limit the utility model, and the protection scope of the utility model is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the utility model within the spirit and protection scope of the utility model, and such modifications or equivalent replacements should also be deemed to fall within the protection scope of the utility model.

Claims (6)

1. the interface switching device for the performance test of 2M line, it is characterized in that, comprise crystal head, two plain conductors with insulating coating, female and two-way males, one end of two described plain conductors is all connected with described crystal head, the other end of two described plain conductors is connected with the core of described female and shell respectively, and described female connects with the described two-way male for being connected 2M line to be measured.

2. the interface switching device for the performance test of 2M line according to claim 1, is characterized in that, described female is bayonet nut connector female.

3. the interface switching device for the performance test of 2M line according to claim 1, is characterized in that, described two-way male is bayonet nut connector male.

4. the interface switching device for the performance test of 2M line according to claim 1, is characterized in that, described crystal head is RJ45 connector.

5. the interface switching device for the performance test of 2M line according to claim 1, is characterized in that, described plain conductor is netting twine.

6. a 2M line Performance Test System, comprise main tester and the remote tester of tester, it is characterized in that, described 2M line Performance Test System also comprises two interface switching devices for the performance test of 2M line according to any one of claim 1 to 5, and the described interface switching device for the performance test of 2M line also has and is respectively used to be connected with 2M line to be measured and two interfaces that main tester or remote tester connect.