E1 G.703 Fibre Optic Modem


  • Extend full or fractional E1 G703 circuits over fibre cabling
  • Multi and Singlemode fibre options
  • RJ-45 and Coax (BNC) E1 presentations
  • Simple DIP switch configuration
  • Supports AMI or B8ZS/HDB3 line codes
  • Electrical and optical loop back tests included


The FIB1-E1 is a fiber optic modem for the transport of G.703 E1 information. The BNC model provides unbalanced 75 Ohm coaxial E1 connections while the RJ-45 model provides balanced 120 Ohm E1 over twisted pair wiring. Configuration is achieved via simply setting the onboard DIP switches.

The FIB1-E1 is available with either multimode and singlemode optical transceiver. When the FIB1-E1 is placed in the FRM301 rack with SNMP management, the card status, type, version, fiber link status, E1 or T1 link status and alarms can all be displayed. Configuration is also available to enable or disable the port, reset the port and initiate local or far end loopback tests.



Item Description
E1 Interface

FIB1-E1B - 75 ohms (2 x BNC)
FIB1-E1R - 120 ohms (1 x RJ45)

E1 Standards

ITU-T G.703, G.704, G.706, G.732, G.823

Optical Interface

Multimode - 1310nm ST 2km
Singlemode - 1310nm ST 15km

AC Power Adapter

Input: 110 VAC +/- 10%
Freqency: 57~63 Hz
Output: DC 9V, 1A


Height 122.6 mm
Width 85.6 mm
Depth 20.0 mm




0 - 50 C (Operating)
0 - 70 C (Storage)

Ordering Information

Order Code Description
CT-FIB1-E1B-ST2 E1 G703 Fibre Optic Modem 75ohm BNC, ST Multimode 2km
CT-FIB1-E1R-ST2 E1 G703 Fibre Optic Modem 120 ohm RJ45, ST Multimode 2km
CT-FIB1-E1B-ST15 E1 G703 Fibre Optic Modem 75ohm BNC, ST Singlemode 15km
CT-FIB1-E1R-ST15 E1 G703 Fibre Optic Modem 120 ohm RJ45, ST Singlemode 15km

More Information