标题（Title） 一般不超过80个字符
Specialized in communication transmission，20yrs of experience with brand
（72 个字符）
关键词（KeyWords）一般不超过100个字符
yinxun,Optical transceiver,PCM multiplexer,E1/ETH,fiber media converter,SDH equipment,MSTP equipment
（100 个字符）
描述（Description）一般不超过200个字符
GuangzhouYinxun---a manufacturer being dedicated to offering accessing &transmitting solution and product for private network user. Main business: PCM device, optic transmitter, telephone transceiver, MSTP, SDH, optic fiber integrated access device
（252 个字符）
