The HPM series PDH Multiplexer is a kind of fiber-optic communication device which can use fiber optic to transport several E1 signal in the meantime efficiently and can test the used E1 automatically, the flexible circuit test and the indication function has a simple single panel form, which provides a 10/100M linearity ethernet port(can choose), the official business telephone PABX telephone function(can choose) to raise applied flexibility also in the meantime enlarge the utilization of the fiber optic.
  
       The ethernet connector 10/100M, Full/Half Duplex self-adapting completely, support VLAN protocol, this ethernet connector can automatically and incessantly study the LAN MAC address which connects with each other, and transmit the target address asanother frame of LAN. Be transparent to the TCP/IP protocol and provides a safe and seamless conjunction for differnt connecter devices of the communication in network.
       The device meets the telecom operators and users’ requirements, and according telecommunication standards. In keeping with demands of electric power, postal service, bank and Unicom, Mobile and Telecom etc. users.