realizes long-distance monitoring of local device to the remote device based on self-copyright IC;

provides two clock types: E1 master clock, E1 line clock;

realize the automatically rate set of local device to remote device

has the function of pseudo-random code testing, convenient for opening of the circuit, and can be used as an error code instrument;

E1 supports 75Ω unbalanced and 120Ω balanced impedance at the same time;

Provides 30 voice channels, support calling indication

Voice port supports O port and S port, O port connects switch and S port connects user’s phone;

Support one ethernet port(option),realize 1*ethernet and 30channel phone over E1 multiplexer transmission;