What is a passive optical network?

Passive Optical Network (PON) is a pure dielectric network, which avoids the electromagnetic interference and lightning influence of external devices, reduces the failure rate of lines and external devices, improves the reliability of the system and saves maintenance costs. It is a long-awaited technology of telecom maintenance department.

The lightless network is a point-to-multipoint optical fiber transmission and access technology. Downlink adopts broadcast mode and uplink adopts time division multiple access mode, which can flexibly form tree, star, bus and other topological structures, and only need to install a simple optical branch point, so it has the advantages of saving optical cable resources, enjoying bandwidth resources, saving computer room investment, fast network construction and low comprehensive network construction cost. Passive optical networks include ATM-PON and Ethernet -PON.

Development trend: The domestic mainstream wired access technologies include ADSL, LAN, HFC, PLC and FTTH, among which some LANs adopt the mode of PON+LAN, and wireless access technologies include WLAN, WiMAX, WiFi, Bluetooth and 3G.

In the past, broadband access network had two main research objectives. The first is to develop in the direction of high speed, security and intelligence, which requires the network to be more flexible, more user-oriented and lower in cost. FTTH is an outstanding representative in the field of wired access. The other is multi-service convergence, which provides flexible access to IPTV, cable TV video, traditional voice and data services on the same platform.