Comtech CRS-500 1:N Modem Redundancy System

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Product Information

  • Type: Redundancy Switch
  • Brand: Comtech EF Data
  • SKU: CMT126

Tech Specifications

Datasheet PDF


The CRS-500 is Comtech’s next generation 1:N Modem Redundancy System. Intended for hub applications, it provides automatic or manual protection for up to 10 Traffic (or prime) modems with one redundant (or standby) modem.

The CRS-500 supports the CDM-625/625A, CDM-760 and CDM-750 modems for select interfaces. The CDM-625/625A is supported when using the 10/100 Packet Processor mode. The CDM-750/760 is supported when using the G.703 interface or the Gig-E interface in all modes.


  • Flexible 1:10 (max.) configuration
  • Primary traffic paths are maintained, error-free, when power is removed
  • Non-interruption of traffic data when Traffic Modem Interface (TMI) cards are removed
  • Bridge mode (hot-standby) redundant modem to ensure quick availability for backup
  • Programmable hold-off times to backup or restore
  • Programmable preference Selectable Prime Traffic Modem
  • Remote (Ethernet or serial) Monitor and Control to switch
  • Multiple user interfaces (Web/HTTP, SNMP, MIB, Front panel)
  • LED summary panel showing switch and modem status, bridge and online/offline
  • Dual independent & hot-swappable/uninterrupted AC or DC power supplies
  • Audible alarm programmable to activate, based on various changes in status

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