Comtech CRS-500 1:N Modem Redundancy System

Comtech CRS-500 1:N Modem Redundancy System

The Comtech CRS-500 is a modular 1:N satellite modem redundancy system for hub and gateway applications. It provides automatic or manual protection for up to ten traffic modems using one bridge-mode hot-standby modem. The system continuously monitors modem status, configures the standby modem to match a failed unit and switches traffic in approximately 500 ms.

Redundancy Configuration: Up to 1:10

Operating Modes: Automatic or manual
Switching Time: 500 ms for bridged backup
Architecture: Control Switch Unit, Data Switch Unit and optional IF Switch Units
Management: Front panel, Ethernet, serial, HTTP and SNMP
Compatible Modems: CDM-625/625A, CDM-750 and CDM-760 with supported interfaces
Applications: Satellite hubs, gateways, broadcast networks, telecom infrastructure and mission-critical SATCOM systems

Key Features

• Protects up to ten traffic modems with one redundant modem

• Bridge-mode hot standby for rapid backup availability

• Automatic switching following modem, transmit or receive faults

• Manual switching through local or remote management

• Automatically configures the standby modem to match the failed unit

• Programmable backup and restoration hold-off times

• User-selectable preferred traffic modem

• Primary traffic paths remain operational if system power is removed

• No traffic interruption when Traffic Modem Interface cards are removed

• Modular CSU, DSU and optional ISU architecture

• Supports IP Packet Processor, Gigabit Ethernet, ASI and G.703 interfaces

• Optional 70/140 MHz and L-band IF switching

• Dual independent hot-swappable AC or DC power supplies

• Web, SNMP, front-panel and serial management

• LED summary display for switch and modem status

• Programmable audible alarm and Form-C fault contacts

Compatibility Notes

• CDM-625/625A: Supported in 10/100 Packet Processor mode

• CDM-750: Supported with selected ASI, G.703 and native Gigabit Ethernet interfaces

• CDM-760: Supported with selected ASI, G.703, native Gigabit Ethernet and Packet Processor interfaces