Comtech EF Data CRS-311, Installation And Operation Manual

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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) - 50 Ω or 75 Ω 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) - 50 Ω 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.