This device provides 1-4* E1 interface , Standard 2 wire telephone as engineering order-wire (optional). It is very flexible. It has alarm function. The work is reliable, stable, and low power consumption, high integration, small size.

The device  provides 1-4*E1 interface, 1-4*10/100/1000M Ethernet interface (Wire Speed 1000M) and 2 expansion interfaces.

The series equipment is in PDH optical fiber transmission, the company developed, based on the special large scale integrated circuit, point to point optical transmission equipment research and development.