Pdh optical terminal Function: 8e1(100m ethernet interface is optional) pdh is the multi-service fiber receiving system with the core of fpga, which adopts special patent technique of reducing jitterf=digital phase locked and clock extracted techniquef=2m interface preventing interference technique, etc. It is suitable for the situations of high request reliability and assistant function, such as the specialized networks of mobile, unicom, electric power, army, police, highway and aviation. 8e1+100m pdh can provide multi-interface of e1 and voice. The hardware adopts large scale fpga, collecting code, decoding, message insertion and alarm, and make the circuit simple so as to improve the reliability of the equipment. 438mm*150mm*44mm