Comtech CRS Series 1:1 Modem Redundancy Switches

Comtech CRS Series 1:1 Modem Redundancy Switches

The Comtech CRS Series provides automatic and manual 1:1 redundancy switching for compatible satellite modems. The switches continuously monitor online and standby units, synchronize their configurations and automatically transfer data and IF signals when an equipment or traffic fault occurs. CRS-150, CRS-170A and CRS-180 models support 70/140 MHz and L-band modem applications.

Redundancy Configuration: 1:1
Operating Modes: Automatic and manual
Fault Monitoring: Unit, receive-traffic and transmit-traffic faults
Supported IF Applications: 70/140 MHz and L-band
Architecture: Active or passive, model dependent
Applications: Satellite gateways, broadcast networks, telecom links, government SATCOM and mission-critical modem systems

Available Models

• CRS-150: Active 70/140 MHz redundancy switch

• CRS-170A: Passive L-band redundancy switch

• CRS-180: Passive 70/140 MHz redundancy switch

Key Features

• Automatic switchover following modem or traffic failure

• Manual switchover through modem front-panel or remote control

• Continuous comparison of online and standby modem status

• Automatic synchronization of modem configurations

• Full bridging architecture

• TX clock and data delivered to both modems

• RX IF delivered to both online and standby units

• RF-relay transmit switching for high isolation

• Supports serial, G.703, ASI, Ethernet and other modem interfaces

• User-selectable automatic switchover conditions

• Standby modem automatically reconfigured after replacement

• CRS-170A and CRS-180 switchover within 0.1 seconds typ. after fault detection

• CRS-150 switchover within 0.5 seconds typ. after fault detection

• Compact modem-powered design

• CE-approved configurations

Compatible Comtech Modems

CDM-570/570A, CDM-570L/570AL, CDM-600/600L, CDM-625/625A, CDM-700, CDM-710/710G, CDM-750 and CDM-760.