Overview
     MOD-FE1 Fiber Modem converts E1 electrical signal into optical data stream for transport over single mode or multimode fiber optic cables. At the opposite end of the fiber, the optical stream is converted back into electrical signals of the appropriate interface such as G.703 & V.35. This fiber optic modem extends the transmission distance up to more than 100Km. The frame format of MOD-FE1 is frame/unframe for E1, so it can be used to transmit E1 signal of frame video or unframe video. The modem is capable of transmitting synchronous data with external clock at speeds from 1 Kbps up to 2.048 Mbps (n*64K), the modem can also be set to transmit asynchronous data at speeds from DC up to 64 Kbps. It also has V.54 diagnosis function and inside Bit error rate test equipment which is convenient for the users to carry the self-test.

Features
　◆ Frame format of E1: frame/unframe
　◆ High performance laser equipments, with perfect optic/electric characteristic, guarantee the safety and stability of data transfer
　◆Data rate: up to 2M,N×64kbps，(N=1~32) 
  ◆ Support CRC-4 alarm function
  ◆ E1 interface features 75Ω and 120Ω two types, convenient for field connection
  ◆ The function that timeslots of remote device auto-follow local device settings can be enabled/disabled (only for this kind of devices)
　◆ Adopting the AGC circuit 
　◆ Adopting the DLL technology to reduce the jitter
　◆ Abundant loop back test functions, convenient for detection
　◆ Internal power supply
　◆ Can connect to V.35 Fiber Modem (only for products of our company）

Specifications
1、E1 Port
　Data rate: N×64Kbps(N=1~32)
  Line code: HDB3
  Impedance: 75Ω unbalanced/ 120Ω balanced
  Electric characteristic: comply with ITU-T G.703 standard
  Connector：BNC（75Ω）、RJ45（120Ω)
  Jitter tolerance: comply with ITU-T G.742 and ITU-T G.823 standard
2、Optical port
  Wavelength: 850nm/1300nm (MM) 1310nm/1550nm (SM)
  Distance: 5km (MM) Up to 120km (SM)
3、Power Supply Voltage: AC 220V / DC﹣48V
4、Power consumption: ≤5W
5、Environment Operating temperature: 0℃～50℃
6、Storage temperature:﹣40℃～﹢70℃
7、Relative humidity: 5%～95%, non condensation
8、Weight 0.4Kg
9、Size: 212mm(W)×150mm(L)×38mm(H)

Typical Application
Order information
  　 MOD-FE1　         FE1 Fiber Modem,20Km, SM 
  　 MOD-V35　         V.35 Fiber Modem, 20Km, SM
       MOD-RS             RS232/485/422 Fiber Modem, 20Km,SM
       MOD-PRS           Passive RS232 Fiber Modem,20Km,SM
      ......