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Before understanding, switch VLAN isolation function, we first to understand the ethernet switch: Ethernet switch is based on Ethernet transmission data switch, Ethernet switch each port can be connected to the host, generally work in full duplex mode, can connect to the port at the same time, ma...

 Optical fiber transceiver is a flexible and effective photoelectric conversion device that plays an important role in multi-protocol photoelectric hybrid LAN. Now, in order to better detect and eliminate link faults, some optical fiber transceivers have link failover (LFP) and remote fault (FEF)...

The VLAN (Virtual Local Area Network) is named “Virtual LAN” in Chinese. A VLAN divides a physical LAN into multiple logical LANs, and each VLAN is a broadcast domain. Hosts in VLAN can communicate with messages through the traditional Ethernet communication mode, but between hosts in...

For optical communication, testing the optical power is an essential step in building the optical environment. The level of optical power affects the performance of the receiving device. Too low light power will make the device impossible to identify, and too high light power will damage the dev...

introduction FTTH means fiber to the home, directly into the user terminal. This is also more than 20 years we continue to pursue to conquer and explore the technology, due to the cost, technology, demand and other aspects of continuous conquer, the technology has been large-scale promotion and d...

The traditional telephone network transmits voice by circuit exchange, and the required transmission broadband is 64 k bit/s. The so-called VoIP is the IP packet switching network as the transmission platform, to simulate the simulated voice signal compression, packaging and a series of special p...