CYGNUS 854 2Mbps Fiber Optic Modem

CYGNUS 854 Fiber Optic Modems are used to extend user equipment connectivity to telephone exchange over fiber lines. The leased lines could be from Railtel or from BSNL or other service provider. These modems support both 64Kbps and 2Mbps lines and different DTE modules.


  • CYGNUS 854 Modems operates in pairs on a dedicated optical fiber link to transmit and receive DTE port data across the link
  • Driving range support upto 20 km on single mode optical fiber. Higher range available as an ordering time option
  • DTE interfaces support 2 Mbps V.35 synchronous interface, 2 Mbps G.703 E1 interface, Asynchronous RS232/RS422 interface
  • Configuration through switches and jumpers
  • Loop back and test pattern generation facilities for quick fault isolation
  • Front panel indicators for displaying unit status
  • Power supply input – ordering time options for 230 VAC, 48 VDC, or both, or 24 VDC

Application Diagram