... telephone,100M ethernet 3.three years warranty 4.MOQ:1 pair PDH optical transceiver 4/8/16E1 PDH optical multiplexer, PDH ... ,link circuit ,loop optical transmission equipment . It can supply 4/8/16/24 interfaces ,one channel 100M ethernet interface ,one ... power output : -8 dBm ~-15dBmRS232 interface 1.working pattern : < 19.2Kbit/s asynchronous serial interface2.interface type : RJ45E1 interface 1 ...