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4E1+ETH PDH Multiplexer

4E1 + Ethernet Fiber Optical Multiplexer can multiplex to 1-4 E1 signals for transmission over an optical fiber, resulting in reaching a longer distance without a repeaters and superior performance compared to copper media.


4E1 + Ethernet Fiber Optical Multiplexer is the 1-4E1 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 1-4E1. The outer design use the standard 19 inches rack, so the volume is little, weight is light and operation is convenient and credit.

It uses 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 1-4E1 Fiber Optical Multiplexer, it is stable and easy to maintenance, install and small in size. It has one digital service telephone.




Base on IC of independence intellectual property rights

Adopt veneer structure

Offer 1-4 ×2Mb/s digital interfaces

Up to 4 E1 links on one fiber

One link to service telephone for duty contract

Provides one channels of 10M/100M, support VLAN.

One channel OA for optional.

When fiber signal is loss, users can distinguish whether the remote device is power off or the fiber line is down from the indicator status on the local device.

1U/19inch type model can provide SNMP network management port independently. It can also support cascade management. (optional)

User can become conscious of the temperature and voltage of the local device in SNMP managing interface. (Optional)

User can also become conscious of the temperature and voltage of the remote device in SNMP managing interface, and can set the alarm threshold of the remote device’s temperature. (Optional)

180-260VAC & -48VDC 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 inches rack, little volume, light weight, steady capacity and convenient setup



  Fiber interface

  Optical wavelength: 1310nm/1550nm (single-mode)

  850nm/1310nm(multi-mode) for option

  Optical interface: SC/FC/ST/SFP for option

  Sending consumption: -9dBm/-5dBm

  Receiving and dispatching module: >-6dBm

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

  Optical code: NRZ

  Transmitting range: MM0~2Km; SM 0~120Km for option


  E1 interface

  Interface code: HDB3 code

  Line speed: 2.048Mbp/s ±50ppm

  Interface standard: ITU-T G 703

  Interface impedance: 75Ω/unbalanced (BNC), 120Ω/balanced RJ45

  Allowed attenuation: 0~6dBm

  Rate: 10/100M, full/duplex auto-negotiation

  Protocol: Support IEEE 802.3, IEEE 802.1Q (VLAN)

  MAC Address Entiries: 4096Entiries

  Connector: BNC



485 mmL×140 mmW× 44 mmH


Power supply

AC220V: input voltage AC 180V260V

DC-48V: input voltage -36V-72V


Operation Condition

Voltage: AC180V ~ 260V; DC –48V; DC +24V

Consumption: ≤5W

Operating temperature: 0°C~50°C

Storing temperature: -40°C~+70°C

Relative humidity: 95 %

Without disturbance of erosive and solvent gas, raising dust or strong magnetic field