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4E1 to Ethernet Protocol Converter(GFP)

This model adopts inverse multiplexing technology that transmitting 1-4 10/100BaseT over 1~4 E1 links. Employing Ethernet-over-PDH technique, it allows the transport of native Ethernet frames over the well-established PDH telecommunications infrastructure. This enables carriers to make use of the extensive legacy PDH and TDM equipment to provide new Ethernet-centric services. It can be used for interconnecting Wimax Base Stations and IP exchanges (MSAN & MSAG) de-ployed at remote locations to the aggregation Switches through E1 interface. It supports flexible configuration if 1~4E1 links, auto-detecting the number of E1 and selecting the available channels.


This model adopts inverse multiplexing technology that transmitting 1-4 10/100BaseT over 1~4 E1 links.

Employing Ethernet-over-PDH technique, it allows the transport of native Ethernet frames over the well-established PDH telecommunications infrastructure. This enables carriers to make use of the extensive legacy PDH and TDM equipment to provide new Ethernet-centric services. It can be used for interconnecting  Wimax Base Stations and IP exchanges (MSAN & MSAG) de-ployed at remote locations to the aggregation Switches through E1 interface.

It supports flexible configuration if 1~4E1 links, auto-detecting the number of E1 and selecting the available channels. 



      nBe fully compatible with the following specifications: a) IEEE 802.3;   b) ITU-T G.703;   c) ITU-T G.704, (G.7041, G.7042, G.7043);  d) ITU-T G.823;  e) ITU-T G.8040.

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

nSupport and transparently pass all the protocols that exist in 10 Base-T, 100 Base –TX Ethernet networking system.

nMap 100Base-TX or 10Base-T Ethernet data into 4E1 channels, and vice versa.

nLearn automatically the MAC address in the connected LAN and only transmit the destination address of the frame in another LAN.

nExtend the bandwidth to 8.192M using 4E1 channels to Ethernet Converter over Telecom operator’s SDH/PDH network before aggregation to a switch.

nThe converter shall provide the facilities to auto-inspect and auto-restore affected E1 channels without interrupting the data traf-fic

nAuto-detect the valid E1 channels and auto-balance the data flow among the valid E1 channels

nprovide remote and local E1 Loop test when it has LOS and LOS alarm, and inform the remote end simultaneously.

nprovide remote and local E1 Loop test function through indicators

nprovide comprehensive LED alarm/working status indicators for E1 and Ethernet interfaces

nprovide NMS function, the NMS is based on TCP/IP network and shall support SNMP V1, V2 / V3  protocol  which it monitored   through   NMS   GUI   and   WEB  based both

nInput Power supply: DC -48V and should be operational from -45 to -57 DC Volts and also should support AC 180V~240V.The converter shall consist at least one earthing (grounding) port

nsupport Channelized and Non-Channelized E1’s 

nsupport to configure by Console port(RS-232)

nThe NMS port in the equipment is 10/100Base-T Management port and support TCP/IP


 E1 interface

Standard: in accordance with ITU-T G.703, G.704 

Rate: 2.048Mbit/s±50ppm

Coding: HDB3

Impedance: 75Ω (unbalance)

Connector: BNC (75Ω)

Jitter Performance: According to G.742 and G.823 

10/100Base-T interface

Rate: 10/100M, 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)


1U/19inch rack : 483(W)*140(D)*44(H)

Operating Environment

Voltage: AC180V ~ 240V; DC –48V

Power Consumption: ≤5W 

Working temperature: -10°C~50°C

Storage temperature: -15°C~70°C

Humidity: 95 %