Features:

  

Realizes transparent transmission of Ethernet data in 1 to 8 E1 channels.

Ethernet supports 10M/100M, full/half duplex auto-negociation, supports VLAN.

Ethernet port supports AUTO-MDIX (cross over and straight through auto-adapt).

Setting CRC alarm limitation to auto isolate lines with low transmitting quality (being cut single-directionally); when error code rate of one direction in 2M branch exceeds the limitation, this direction is cut and the other direction will not be affected, namely the two transmitting directions of Ethernet can be unsymmetrical.

Allow 8 E1 channels up to 10ms transmission delay. When the delay exceeds allowed limit range, it can stop transmitting data automatically.

Has 2 loop back functions: E1 local loop, E1 remote loop.

Supports Dynamic Ethernet MAC address (4096) with local address filter function.

E1 interface compatible with ITU-T G.703, G.704, and G.823. Not supporting signal timeslot.

E1 interface has internal clock recover circuit and HDB3 code/decode circuit.

Supports E1 channel hot plug, and auto detect effective E1 channels data transmission will not be cut.

Supports 1 to 8 E1 channels customized configuration, auto detect the number of E1 channels and select the available E1 when resetting.

Supports resetting remote system from local system.

Having Ethernet monitor auto reset function.

Parameter and specifications          
    E1 interface                                                                        rear panel with 75ohm
Standard: E1 interface compatible with G.703 standard.
Rate: 2.048Mbit/s?50ppm
Coding: HDB3
Impedance: 75ohm ( unbalance) or 120ohm (balance) 
Connector: BNC (75ohm) or RJ45 (120ohm)
Jitter: According to G.742 and G.823 
Ethernet interface                                                                  
Rate: 10M/100M, full/half duplex auto-adapt.
Protocol: Support IEEE 802.3, IEEE 802.1Q (VLAN)
MAC address table: 4096 MAC addresses.
Ethernet buffer: 64Mbits SDRAM
Physical interface: RJ45, support AUTO-MDIX (cross over and straight through auto-adapt) 
Dimension
19inch rackmount type:433 mm(L)×138mm(W)× 44 mm(H)
Operating environment
Voltage: DC-48V, input range:     DC-36V~DC-72V
Power Consumption:       <=5 Watts
Working temperature: 0C~50C 
Storage temperature:       -40C~+70C
Humidity:  95%
No causticity and solvent, dust free, and no strong magnetic interference.