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Multi-Service G.703 E1 Fiber Optical Modem
Multi-Service G.703 E1 Fiber Optical Modem
Supplier Info
[China Supplier]
Contact Person : Ms. Wang Ellen
Tel : 86-010-62116471
Fax : 86-010-62192771
Product Detail
Fiber Optic Modem 1.E1 digital interface(75/120ohm) 2.V.35 interface 3.RS232 asynchromous data interface 4.E1 and V.35

Multi-service SPC-155M Fiber modem


The SPC-155M Multiservice Fiber Optic Modem is manufactured based on Spacecoms proprietary purpose-built integrated circuits. It integrates the traditional 2M E1, 10/100Base-Tx (max bandwidth: 100M), and N×64K V.35 services in one equipment so that it can operate both high-speed digital service and traditional TDM service in one pair of Fiber. It can also provide centralized rack structure for easy maintenance as well as plug and play, and at the same time, provide complete network management functions.


E1 Fiber Optical ModemE1 and RS23275ohm and 120 ohmG.703 Fiber Optic ModemE1 PDH Multiplexer ,2M E1

E1 Fiber Optical Modem is called single E1 PDH Multiplexer,which can multiplex one E1 and one RS232 to fiber line.It is widely used 

in transmission of Moble Base Station,PHS Base Station and large consumer FTTH.


Provides an E1 digital interface (75Ω/120Ω)Provides a V.35 interface (N×64K, N= 1~32, support all the V.35 clock mode)Provides one or four routes of 10/100Base-Tx Ethernet interface, Max bandwidth 100MProvides a RS232 asynchronous data interfaceE1 and V.35 channel switch overProvides a management interface for centralized monitoring, and support system upgradingAdopt large-scale chip, simple circuit, low power consumption and high reliabilityApplicable in a variety of power supply environments: -48VDC or 220VACSmall, light, stable, reliable and easy for installation

Technology  Characteristic

   Realize one E1 transparent transmitting over fiber 

   E1 fiber modem and V.35 fiber modem can be used together

   Realize one RS232 transparent transmitting over fiber,bit is 4800bps

   Support all kinds of loop function,for testing and opening conveniently

   Support network management function,monitoring the working of device and seting the state of device

   Supply the unbalance 75ohm and balance 120ohm E1 interface

Interface Parameters

E1 interface :

   Accord with TTU-TG.703 , G.823

   Code type : HDB3 ,all necessary alarm functions

   Bit rate : 2048kbps±50ppm

   75Ω interface with BNC standard connector and 120Ω interface with RJ45 connector

Optical interface :

   Transmission mode :single-mode

   Optical wave length : 1310nm

   Interface mode : FC

   Module type :double fiber

 Working Condition:

  Power Supply :AC220V±20%  ,   DC-36V~-72V

  Power Consumption:<3W

  Environment Temperature : 0~50

Other Characters:



Multi-Service G.703 E1 Fiber Optical Modem

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