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8E1+ETH PDH Multiplexer

8E1 Fiber Optical Multiplexer is a kind of fiber-optic communication device which can use fiber to transport 8 E1 signal in the meantime efficiently and can test the used E1 automatically. The flexible circuit test and the indication function has a simple single panel form, which provides 1 10M/100M Ethernet ports(optional) and a office phone port (optional), raising applied flexibility also in the meantime enlarge the utilization of the fiber optic.


8E1 and Ethernet Fiber Optical Multiplexer is the 8E1 point-to-point optical transport equipment that uses the FPGA chips and it is easy to upgrade. It is single board structure and the largest transmission capacity is 8E1. The outer design use the standard 19 inches rack, so the volume is little, weight is light and operation is convenient and credit.


8E1 and Ethernet Fiber Optical Multiplexer, adopts the PDH fiber transmission technologies. The 2M (E1) interfaces can connect with the exchanger, light loop device and multi-diplexer directly to form the macromedia or the special network. Complete alarm function for 8E1 and Ethernet Fiber Optical Multiplexer, it is stable and easy to maintenance, install and small in size. It has one digital service telephone.



Provides 8E1 transparent transmission;

Has complete alarm function and can monitor remote device status;

The supervisory control interface implements centralized monitoring and export the monitor and control information of this port and opposite port.

Support RJ11 hotline function

AC220 & DC-48V power options and the positive and negative of DC-48V can be optional because there is the self-test circuit for the polarity inside th1e device

Standard 19/9.5 inches mount, little volume, light weight, steady capacity and convenient setup

LED indicators

Support network management (SNMP).



  E1 Interface

Information bit rate

2.048Mbit/s ±50ppm

Line code


Pulse amplitude

2.37 V peak ±10% output port

Line impedance

75Ω/unbalanced or 120 Ω/ balanced

Pulse width

224ns at half amplitude

Return loss

﹥18 dB at 4.224MHZ

Maximum insertion Loss

:≥6dB at 4.224Mhz on the cable

Jitter tolerance

fine than ITU-T G.742,G.823


  Optical interface

  Optical interface: SC/FC/SFP for option 

  Optical Wavelength: FP1310 nm /DFB1550nm+/-50/40nm

  Sending consumption: -9dBm/-5dBm

  Receiving and dispatching module: >-6dBm

  Optical receiver receiving sensitivity: <-36 (BER<10 -10):

  Code format: CMI or 5B6B

  Dynamic range receiving: >-30dB

  Optical code: NRZ

  Single mode: 10/125 um  

  Transmitting range: SM 20Km/40Km/60 Km/120Km for option



485 mmL×140 mmW× 44 mmH


Power supply

AC220V: input voltage AC 180V~260V

DC-48V: input voltage -36V~-72V


Operation Condition

Input voltage: AC220V, AC180V~AC260V;

DC -48V, DC-36V~DC-72V

consumption: ≤ 5W   

Operating temperature: 0°C ~ 50°C

Relative humidity: 95 %

Storing temperature: -40°C ~ +70°C