1.4E1/8E1/16E1 fiber optic multiplexer 2.RS232,1 channel service telephone,100M ethernet 3. ... , PDH MuxHS-OPT series PDH optical transceiver ,which is based on super large scale integrated circuit ,a point to point ,link ... parameters Optical fiber interface 1.fiber type : single mode fiber ,muti mode fiber ,optional2.wave length : 1310nm,1550nm,850nm,optional3.optical fiber interface : SC,FC ,ST ...