This device provides 4Channel telephone 1-4Channel E1 interface, 4Channel 10M/100M/1000M Ethernet interface (Line Speed 1000M) and 4 expansion interfaces. 4Channel Ethernet interface is switch interface, can support VLAN. 4 expansion interfaces can be used as the transmission channel of RS232/RS485/RS422 asynchronous data, voice signal, 2/4-line E&M audio signal, switch signal, Ethernet signal (Bandwidth 2M). It is very flexible.

Features
✓ Based on self -copyright IC
✓ E1 interface comply with G.703, adopts digital clock recovery and smooth phase-lock
technology Voice port supports FXO and FXS port,
✓ Voice port supports FXO port and FXS ports, EM2 / 4 audio interface, magneto telephone
interface; FXO port and docking PBX connected to FXS port and the user's phone;
✓ Voice FXO/FXS access, supports caller ID feature and reverse polarity billing functions
✓ Support various sites mutual number allocation function
✓ Provide 4 expansion interface, you can extend 1~4Channel asynchronous data, such as
RS232/RS485/RS422/Manchester code;1~4Channel voice, 1~8Channel switch or two/fourline audio and so on
✓ Ethernet interface supports 10M/100M/1000M, half/full duplex auto- adaptable, support
VLAN
✓ 4Channel Ethernet interface is switch interface, support VLAN, can set to 4 channel logical
isolation
✓ Ethernet interface can support AUTO-MDIX (crossed line and straight connected line selfadaptable)
✓ The transmission distance is up to 2-120Km without interruption
✓ AC 220V, DC-48V, DC24V can be optional