Product Description

Product Introduction
FE1/Double ETH Interface Converter (also as FE1/Double ETH Bridge) is an Ethernet bridge of high performance, which accomplishes the converting between the **0M Ethernet port and the E1 port. As an extended device of the Ethernet, the FE1/Double ETH bridge realizes interconnection of two Ethernet by using the E1 channel provided by existing networks with low cost.
**0BASE-TX (RJ*5) interfaces are provided at the end of Ethernet LAN to accomplish various functions including double Ethernet interface broad band shared,  MAC address self-learning, address filtering, address table maintenance and flow control. For the client which only require not more than 2 Ethernet, it can be reduce the net node, dispense with the device as HUB, consequently reduce the malfunction node.
E1 interfaces conforming to ITU-T G.**3 and G.**4 proposals are provided at the end of WAN, supporting RJ*5 and BNC connection modes. The E1 ports support both framing and un-framing architecture. The user can select an operating mode for the E1 interface according to the connected E1 environment. This provides flexibility of network application. In the framing mode, the E1 interface provides a rate of N**4Kbps（N=1~*1）. In the un-framing mode, the E1 channel provides a rate of 2.**8Mbps and accomplishes transparent transmission.
If the FE1/Double ETH bridge is used in the framing mode, the transmission clock can be either provided internally, i.e. using the main clocking timing mode (INT), or extracted from the E1 channel, i.e. using slave clock timing mode.
The FE1/Double ETH bridge provides plenty of self-test functions, supporting local loop and remote loop. It also provides pseudo random code test function to test error codes in the circuit.
It is proposed to use the products of this series in pairs.

Technical Specification

 In accordance with the provisions of IEEE **2.3、**2.3u Ethernet, ITU-T G.**3, G.**4 and G.**3 protocols.
 E1 interface framing/un-framing optional; balanced **0ohm unbalanced  *5ohm optional.
 The E1 interface uses PCM*1 mode, supporting CRC check.
 E1 interface main/ slave clock optional in the framing mode.
 In the E1 framing mode, the number of time slots is optional from 1 to *1.

 Supporting 2.**8Mbps transparent transmission in the E1 un-framing mode.

 The two **0BASE-TX Ethernet interfaces support **0M half/ full duplex modes.
 MAC addresses self-learning and addresses filtering functions, reducing the transmission load of the E1 circuit.
 Built-in *4Mbits SDRAM Ethernet data buffer memory, improving the capability of Ethernet side anti-outburst, assuring high throughput of data transmission.
 E1 circuit remote loop and local loop tests.
 Pseudo random sequence test, facilitating the test of E1 circuit.
 Perfect circuit test and alarm indication.
 Optional AC **0V or DC –*8V for bridge of both architectures

    Protocol:  G.**3, G.**4, G.**6, G.**3, I.**1
    IEEE**2.3u **0BASE_TX
    Circuit interface (E1):  
     Impedance: *5&branded;, physical interface: BNC
     Impedance: **0&branded;, physical interface: RJ*5
     Interface rate: framing: N**4Kbps，N=0~*1;  
                          un-framing: 2.**8Mbps。
    Coding: HDB3,Jitter tolerance in accordance with G.**3
    Output jitter < 0.*5UI
    Data interface (**0BASE_TX):
    Impedance: **0&branded;, physical interface: RJ*5
    Interface rate: **0Mbps 
    Coding: Manchester
    Cable: *5&branded;coaxial-cable, UTP5 twisted pair。
    Transmission range:
    Circuit interface: BNC: **0m; RJ*5: **0m
     Data interface: **0m
    Indicator: indicating power, connection states of data and circuit interfaces, operation state, test state and trouble alarm.
    Dimensions: **0mm (dep) x **0mm (wid) x*0mm (hei)
    Power supply: *5V～**4V AC , 5V/1A output
                        **6V～**2V DC ，5V/1A output
   Power dissipation：3W
   Operational temperature: 0℃～*0℃
   Storage temperature: **0℃～*0℃
   Humidity: 5%～*0% (no condensation)