Test methods of fiber media converter

Time : Sep. 02, 2022    View : 17

Fiber media converter products are generally used in actual network environments that cannot be covered by Ethernet cables and must use optical fibers to extend the transmission distance, and are usually located in the access layer application of broadband metropolitan area networks; such as: high-definition video image transmission for monitoring and security engineering . In the process of using fiber media converter, we will inevitably encounter some problems. Then, when we encounter problems, how to test the failure problem of fiber media converter? The test methods of 11 kinds of fiber media converters such as input power characteristics, temperature characteristics, and safety characteristics of the whole machine will be introduced in detail. Let’s take a look!

 

  1. Testing of components

       Mainly use test equipment such as multimeter and oscilloscope to test the electrical characteristics of each component under test.

 

  1. Input power characteristics for the whole machine

       Connect an AC voltage regulator to the AC power input end of the machine, change the AC input voltage of the machine, and check the input voltage range for the normal operation of the machine. It is required that the input voltage of the machine to work normally is 110v-260v, and the input power is not more than 50w.

 

  1. Temperature characteristics of the whole machine

       Test the highest temperature point at normal temperature (25°C) when the whole machine is working under full load. Is it normal for the whole machine to work at full load for 24 hours at 55 degrees Celsius. When the machine is required to work at room temperature, the maximum temperature in the chassis does not exceed 50 degrees. It can work normally for more than 24 hours in a 55 degree environment.

 

  1. Safety features of the whole machine

       Test the leakage current of the whole machine under the mains working environment and the flame retardancy of the outer casing. It is required to comply with the relevant national safety standards.

 

  1. Stability test of the whole machine

       Test the stability of the whole machine working under full load and continuous operation for more than 100h under normal temperature and normal power supply. Different test operating systems and test software can be replaced during the test. It is required that each port can be used normally during the test period, and the phenomenon such as disconnection cannot occur, and the whole machine cannot appear in the state of crash, abnormality, and transmission speed drop. The full load operation mentioned above means that every port of the device under test is used, and each port must be sending and receiving data. The test software used can use the test software mentioned earlier.

 

  1. Functional test of the port

       Mainly test whether each port can work normally in the duplex state of 10Mbps, 100Mbps and half-duplex state. At the same time, it should be tested whether each port can automatically select the highest transmission speed and automatically match the transmission rate of other devices. This test can be included in other tests.

 

  1. Compatibility Test

       It mainly tests the connection ability between the fiber media converter and other devices compatible with Ethernet and Fast Ethernet (including network card, HUB, Switch, optical network card, and optical switch). The requirement must be able to support the connection of compatible products.

 

  1. Cable connection characteristics

       Test the fiber media converter’s ability to support network cables. First of all, you should test the connection ability of 100m, 10m and other lengths of Category 5 network cables, and test the connection ability of long-term Category 5 network cables of different brands. During the test, the optical port of the transceiver is required to have a connection capability of 10Mbps and 100Mbps, and the highest must be able to connect to a full-duplex 100Mbps without transmission errors. No test is required for Category 3 twisted pair cables. This test can be included in other tests.

 

  1. Transmission characteristics

       It mainly tests the packet loss rate when the fiber media converter optical port transmits different data packets, and the connection speed under different connection rates. For the packet loss rate, you can use the test software that comes with the network card to test the packet loss rate when the packet size is 64, 512, 1518, 128 (optional) and 1000 (optional) bytes under different connection rates. , the wrong number of packets, the number of packets sent and received must be more than 2,000,000. Test transmission speed can use perform3, ping and other software.

 

  1. The compatibility of the whole machine to the transmission network protocol

       It mainly tests the compatibility of fiber media converter to network protocols. It can be tested in Novell, Windows and other environments. The following low-level network protocols such as TCP/IP, IPX, NETBIOS, DHCP, etc. must be tested, and the protocols that need to be broadcast must be tested. Optical transceivers are required to support these protocols (VLAN, QOS, COS, etc.).

 

  1. Indicator light status test

       Test whether the status of the indicator light is consistent with the description of the panel and the user manual, and whether it is consistent with the current status of the fiber optic media converter.