Comtech EF Data CRS-311 - Manual (Page 29)

CRS-311 1:1 Redundancy Switch Revision 7
Introduction MN/CRS311.IOM
1–5
1.2 CRS-311 Switch/Modem Compatibility
Table 1‐1 shows the Comtech EF Data modems that are compatible for use with the CRS‐311 1:1
Redundancy Switch:
Table 1-1. CRS-311 Switch/Modem Compatibility
Modem Optional Switch Modules
CDM-Qx
CRS-281 IF Switch Module (70/140 MHz) - 50Ω or 75Ω BNC
Up to one modulator and one demodulator allowed per
CDM‐Qx/QxL.
CDM-QxL
CRS-281A IF Switch Module (L-Band)
Up to one modulator and one demodulator allowed per
CDM‐Qx/QxL.
SLM-5650
SLM-5650A
CRS-281 IF Switch Module (70/140 MHz) - 50Ω TNC
CRS-281L IF Switch Module (L-Band)
CRS-351 ESC Switch Module (IDR Overhead)
COMPATIBILITY NOTE: The CiM‐25, Comtech EF Data’s low‐cost Internet Protocol
(IP) Monitor & Control (M&C) interface for existing CEFD modems, is not compatible
for use on modems operating within a CRS‐311 1:1 redundancy system. Taking this
prohibition of use under further consideration, the CiM‐25 should not, under any
circumstances, be connected to the “Remote Control” port on the CRS‐311’s CRS‐230
System Controller module for control of the Switch and modems.