This interface converter is based on FPGA, providing one unframed E1 interface and one Ethernet interface to achieve 10/100Base-FX  Ethernet data transmission on the E1 channel. It is a high performance, self-learning Ethernet bridge. This device is the extension device of Ethernet, using network (PDH/SDH/Microwave) that provide E1 channel to achieve local and remote Ethernet interconnecting with serial interfaces at a lower cost. The device has inter-set loop test function to facilitate the project launching and daily maintenance.

●Based on self -copyright  IC 
●Can realize monitor and control of remote equipment, OAM management data did not  take up user’s  timeslot and save E1 bandwidth
●E1 supports any timeslot set, the rate is 64K-2048K
●The local device can forced the remote device rate follow it
●Have the function of E1 interface loop back check, avoid the converter crashed because of interface loop  return;
●Have indicator light when the device is power-off or E1 line is broken or lose signal;
●Can set the E1 line that not to send the LINK signal to Ethernet interface while E1 line is broken;
●The Ethernet interface supports jumbo frames (2036 Bytes);
●Inter-set dynamic Ethernet MAC address (4,096) with local data frame filtering 
●Ethernet interface supports 100M, full duplex , support VLAN
●Have Ethernet monitor self-reset function, the equipment will not dead
●The local device can forced the remote device rate follow it ( valid when framed)
●Provide 2 clock types: E1 master clock and E1 line clock;
●Have three Loop Back Mode: E1 interface Loop Back (ANA)、Ethernet interface Loop Back(DIG)、Command the remote Ethernet interface Loop Back(REM)
●Provide 2 impedances: 75 Ohm unbalance and 120 Ohm balance;
●Support SNMP Network Management;
●Can realize monitor of remote equipment temperature and voltage from local equipment; 
●Can form the structure: Ethernet E1 Bridge(A)－－-Optical Ethernet Modem(B)－－-Ethernet Optical Fiber  Transceiver (C), can manage (B) and (C) at (A

E1 interface
Equipment interface: the equipment interface meets the recommendation of G.703
Rate: 2048kb / s ± 50ppm
Code type: HDB3
Impedance: unbalanced 75 / balanced 120
Unbalanced coaxial interface adapter for 75-2 / 3 coaxial cable
Jitter characteristics: meet the recommendations of g.742 and g.823
Allowable attenuation of input port: 0 ～ 6dbm
10/100M Ethernet
Protocol: IEEE 802.3az, IEEE 802.1Q (VLAN)
adaptive
MAC address table: can learn 4096 MAC
addresses
Physical interface: RJ45 supports auto mdix
Electrical and mechanical characteristics
System power supply: ac180v ～ 260V; DC – 48V; DC + 24V
Power consumption: ≤ 5W
Appearance structure: (length × width × height) 216 * 138 * 41mm desktop type

Environmental indicators
Working temperature: – 10 ℃ – + 60 ℃
Storage temperature: – 40 ℃ – + 85 ℃
Working humidity: 0% – 95% (no condensation)
MTBF: > 100000 hours