Sdh Synchronous Digital Multiplex Equipment Optical Interface Board Design And Implementation

Since the Middle of 1990's, fiber communication technology has been applied in the telecom network in a large scale, which has become the main way of transmission owing to it's low price and fine characteristic of bandwidth. SONET/SDH also grows fast into the main body of modern transmission with the development of fiber communication. SDH has the unified network node interface (NNI), standardized information class structure in all the world and can be compatible with PDH, which makes all the transmission network systems can communicate with each other on the level of STM-N. SDH transmission network is made of some SDH equipments (Network element), which can transmit, multiplex, cross the synchronous information on the fiber. SDH equipment can implement all kinds of function in the transmission network. According to the different function, the common SDH equipments include terminal multiplexer(TM), add-drop multiplexer (ADM), regenerator (REG), data cross connect (DXC). ZXSM 2510 is a kind of enhanced 2.5 G synthesized information transmission equipment, which has the powerful data connection and transmission ability and can upgrade into 10G transmission equipment. ZXSM 2510 transmission is made of some single boards such as net control processor (NCP), synchronous clock (SC), cross switch (CS), optical line (OL), electric tributary (ET), order wire (OW) and mother board (MB). Optical line (OL) is one important component of SDH equipment, which is the interface of optical business signal. The...