CN103391141A - E1 interface signal tester and test method thereof - Google Patents

Abstract

The invention is an E1 interface signal connection tester and a testing method thereof, which uses the unidirectional conduction characteristic of a light emitting diode to realize the testing of the E1 interface signal flow. Its structure includes an E1 interface connector and a direct connector, the connector is respectively connected to the light-emitting diode and the direct connector, the positive pole of the light-emitting diode is connected to the signal transmission line, and the negative pole of the light-emitting diode is connected to the shielding wire; the outer surface of the signal transmission line is provided with an inner sheath , the outer surface of the inner sheath is provided with an outer conductor. The present invention can quickly and accurately test the receiving and sending of E1 interface signals on the DDF frame or under the condition of direct connection between transmission and service E1 interfaces, realize fast connection between transmission and service side E1 interface signals, and perform equipment and cable fault judgment , Positioning needs.

Description

E1 interface signal tester and its testing method

technical field

The invention relates to a signal tester, in particular to a communication equipment and service E1 interface signal tester and a testing method thereof, which are applied in various tasks such as communication equipment construction, service testing and maintenance.

Background technique

With the rapid construction and development of the power system, the power system communication industry has developed into an optical communication network based on optical communication and digital communication technology. As the most basic rate interface of optical communication and data communication system, E1 interface has been widely used in today's communication system. From the central communication room of the power system to the communication equipment of substations at all levels, whether it is dispatching, relay protection, telecontrol, power collection, data network and automation system, or the communication services of administrative switches, dispatching switch networking and the Internet, etc. The transmission connection must use the E1 interface. However, for a long time, when the transmission system is connected to the E1 interface of various services, there is no fixed test instrument for whether the E1 signal transmission is normal or for judging the direction of receiving and sending. If the signal is not connected, then exchange the two E1 interface plugs. If it still does not work, you need to check whether the connection is normal, or use a 2M bit error detector to monitor whether the transmission system and access network equipment system signals are normal. This brings a lot of inconvenience to the on-site construction operations and increases the intensity of the work. Sometimes a business opening work often needs to go to the site several times, and it can only be completed after the cooperation of various professionals for testing, and expensive test instruments must be carried.

Contents of the invention

The present invention aims at the problems existing in the above-mentioned existing practical work, and proposes an E1 interface signal tester, which adopts the characteristics and working principle of light-emitting diodes, and utilizes the existing E1 interface connectors and direct-connected devices to solve the problems that cannot be solved in the prior art. The completed E1 interface signal receiving and discovering field connection and testing issues.

Another object of the present invention is to provide a testing method for an E1 interface signal tester.

Technical scheme of the present invention is as follows:

Including the E1 interface connector and the direct connector, the connector is respectively connected with the LED and the direct connector, the anode of the LED is connected with the signal transmission line, and the cathode of the LED is connected with the shielding wire; the outer surface of the signal transmission line is provided with an inner sheath, and the inner The outer surface of the sheath is provided with an outer conductor.

The signal transmission line is a core wire.

The shielded wire is a wire sheath.

The inner sheath is an insulating layer.

The outer conductor is a shielding layer or a signal ground; the outer surface of the outer conductor is provided with an outer sheath.

The connector is connected to the E1 signal test plug on the DDF frame.

The direct connector is connected to the E1 signal line of the equipment on the transmission or service side.

Test method of the present invention comprises the steps:

Remove the direct connector part of the E1 interface signal tester, and only use its main part to directly insert the E1 interface test plug or socket that needs to be tested in front of the DDF frame for testing. When the signal indicator light glows red, it is The E1 signal is sent, and the one that does not emit light is the E1 signal received; if the two interfaces of an E1 signal are not illuminated or both are illuminated, it means that the branch signal sent by the transmission equipment or service equipment is abnormal, and needs to be checked and dealt with.

Test method of the present invention comprises the steps:

Connect the E1 signal jumper to the sending side of the 2M cable of the device on the DDF frame, and use the E1 interface signal tester on the other side of the jumper to test. If the indicator light is on, the jumper is normal. If the indicator light is not on , indicating that the soldering of the jumper is poor and needs to be reprocessed.

Test method of the present invention comprises the following steps:

Use the direct connector of the E1 interface signal tester to connect to the E1 signal lines sent from both sides of the transmission equipment and business equipment. The transmission on the service equipment side is connected to the reception on the service equipment side, and the reception on the transmission equipment side is connected to the transmission on the service equipment side to achieve reliable signal connection; Light, indicating that the transmission equipment or service equipment side equipment is faulty, the wiring is wrong, or the cable is not good, then the location of the fault will be judged on site, and it will be dealt with immediately.

The advantages and effects of the invention are: the measurement of the signal flow of the E1 interface is realized by using the unidirectional conduction characteristic of the light emitting diode. The E1 signal tester of the present invention is made by connecting the joint part of the E1 interface test line with the positive pole and the negative pole of the light emitting diode respectively, and cooperating with the E1 interface direct connector. The specific features are as follows:

1. The test accuracy is high, and the field applicability is strong.

2. Low cost, small size, light weight, quick operation and easy to carry.

3. The test connection is flexible and convenient, and the operation method is simple and easy.

4. It is suitable for testing various E1 interface signals and is widely applicable.

5. Strong practicability, wide application range, and improved work efficiency.

6. Improve the speed of communication network fault handling to ensure safe operation.

7. It can improve work efficiency, save the cost of going to and from the work site, and the test is convenient and fast.

Improve communication network equipment and business failure processing speed.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the present invention.

Fig. 2 is a schematic connection diagram of an embodiment of the online testing method of the present invention.

In the figure, 1. Signal transmission line, 2. Shielded wire, 3. Light-emitting diode, 4. Inner sheath, 5. Outer conductor, 6. Direct connector, 7. Outer sheath; 8. Transmission equipment, 9. DDF frame , 10, business equipment, 11, E1 interface signal tester, 12, E1 signal transmission line, 13, E1 signal business line, 14, transmission and business E1 signal connection point.

Detailed ways

The present invention will be described in detail below in conjunction with specific embodiments with reference to the accompanying drawings.

Example

As shown in Figure 1, it includes an E1 interface connector and a direct connector 6, the connectors are respectively connected to the light emitting diode 3 and the direct connector 6, the positive pole of the light emitting diode 3 is connected to the signal transmission line 1, and the negative pole of the light emitting diode 3 is connected to the shielding wire 2 ; The outer surface of the signal transmission line 1 is provided with an inner sheath 4, and the outer surface of the inner sheath 4 is provided with an outer conductor 5. The connector is connected to the E1 signal test plug on the DDF rack, and the direct connector is connected to the E1 signal line of the equipment on the transmission or service side.

The signal transmission line is a core wire.

The shielded wire is a wire sheath.

The inner sheath is an insulating layer.

The outer conductor is a shielding layer or a signal ground.

The outer surface of the outer conductor is provided with an outer sheath.

The working principle of the present invention is as follows:

According to the principle of the frame structure of the E1 interface, it is known that an E1 is a 2.048M link, encoded with PCM, and the frame length of the E1 is 256 bits, which is divided into 32 time slots, one time slot is 8 bits, and there are 8k per second E1 frames pass through the interface, that is, the interface rate is 2048kbit/s. In this way, there will be signal current passing through the sending side of the E1 interface normally. The characteristics of light-emitting diodes (LED for short) are forward conduction, reverse cut-off, and work in a forward bias state. When a forward current passes through, the LED will convert electrical energy into light energy and emit light. Its forward working voltage is generally Not more than 2V, the forward current is about 10mA. Therefore, in testing the E1 interface, connect the signal sending terminal of the E1 interface to the LED. The LED will glow when the equipment signal is sent normally, but when it is connected to the receiving terminal, it will not emit light because there is no signal flow.

The implementation of the test method of the present invention can be mainly divided into three types as follows.

1. Carry out the test of E1 signal on the DDF distribution frame, as shown in Figure 2, when testing on the DDF frame 9, the direct connector part of the E1 interface signal tester 11 of the present invention can be taken off, only use its The main part is directly inserted into the E1 interface test plug or socket that needs to be tested in front of the DDF frame for testing. When the signal indicator light is red, it is the sending of E1 signal, and when it is not lit, it is the receiving of E1 signal. If the two interfaces of an E1 signal do not light up or both light up, it means that the branch signal sent from the transmission device 8 or service device 10 side is abnormal. Need to check processing.

2. Test whether the E1 signal jumper on the DDF rack is normal. As shown in Figure 2, you can connect the E1 signal jumper to the sending side of the equipment 2M cable on the DDF rack, and use the present invention to test on the other side of the jumper If the indicator light is on, the jumper is normal. If the indicator light is not on, it means that the jumper welding is bad and needs to be reprocessed.

3. When there is no DDF rack, test the E1 interface signal on the transmission equipment 8 side or the service equipment 10, as shown in Fig. The signal line is connected. If the light emitting indicator is the E1 signal sending line, and the non-luminous one is receiving the line, the sending on the side of the transmission equipment 8 should be connected to the receiving on the side of the business equipment 10, and the receiving on the side of the transmission equipment 8 should be connected to the receiving on the side of the business equipment 10. To achieve reliable signal connection. If it is found that the two lines on the side of the transmission device 8 or the side of the business device 10 are luminous or dark during the test, it means that the equipment on the side of the transmission device 8 or the business device 10 is faulty, the wiring is wrong, or the cable is not good. You can judge on the spot Where the fault is located, deal with it immediately.

It can be seen from the above embodiments that the E1 signal tester has the advantages of accurate on-site testing, convenient connection, simple and easy operation method, and can be connected with various E1 interfaces for testing. It is flexible in use and operation, small in size and easy to carry. We are widely used in communication equipment construction, business testing, operation and maintenance, etc., which can improve work efficiency, save the cost of going to and from the work site, test convenient and fast, improve communication network equipment and business failure processing speed, and ensure communication. Safe, reliable and stable operation of the network .

The above are specific embodiments of the present invention and the applied technical principles. Any equivalent transformation based on the technical solution of the present invention falls within the scope of protection of the present invention.

Claims (10)

1.E1 the interface signal tester, comprise E1 interface connector and direct-connected device, it is characterized in that connector is connected with direct-connected device with light-emitting diode respectively, the light-emitting diode positive pole is connected with signal transmssion line, and the light-emitting diode negative pole is connected with shielding conductor; The outer surface of signal transmssion line is provided with inner sheath, and the outer surface of inner sheath is provided with outer conductor.

2. E1 interface signal tester according to claim 1, is characterized in that described signal transmssion line is heart yearn.

3. E1 interface signal tester according to claim 1, is characterized in that described shielding conductor is the line skin.

4. E1 interface signal tester according to claim 1, is characterized in that described inner sheath is insulating barrier.

5. E1 interface signal tester according to claim 1, is characterized in that described outer conductor is screen or signal ground; The outer surface of outer conductor is provided with oversheath.

6. E1 interface signal tester according to claim 1, is characterized in that described connector is connected with the E1 signal testing plug on the DDF frame.

7. E1 interface signal tester according to claim 1, is characterized in that described direct-connected device is connected with the E1 holding wire of transmission or business side equipment.

8. the method for testing of E1 interface signal tester according to claim 1, it is characterized in that comprising the steps: that the direct-connected device with described E1 interface signal tester partly takes off, only with its main part, directly be inserted on the E1 interface testing plug of the front required test of DDF frame or socket and test, when the signal lamp person of glowing is sending out of E1 signal, not luminous person is the receipts of E1 signal; If two interfaces of an E1 signal are not luminous or all luminous, illustrate that the tributary signal that transmission equipment or business device side bring is undesired, need to check and process.

9. the method for testing of E1 interface signal tester according to claim 1, it is characterized in that comprising the steps: that the side of sending out on the DDF frame is connected with equipment 2M cable with E1 signal wire jumper, use described E1 interface signal tester to test at the wire jumper opposite side, be that wire jumper is normal if indicator light is bright, if indicator light does not work, illustrate that the wire jumper soldering is bad, need to again process.

10. the method for testing of E1 interface signal tester according to claim 1, it is characterized in that comprising the steps: to use the direct-connected device of described E1 interface signal tester to be connected with the E1 holding wire that transmission equipment and business device both sides are sent here, if the luminous person of indicating device is E1 signal hair line, not luminous person's take-up, sending out of transmission equipment side should be connected with the receipts of business device side, the receipts of transmission equipment side are connected with sending out of business device side, could realize the reliable docking of signal; If find during test that transmission equipment side or two lines of business device side are all luminous or unglazed, illustrate that transmission equipment or business device side apparatus break down, mistake appears in distribution or cable is bad, the abort situation place is judged at scene, processes at once.

Images