Comtech EF Data CRS-311 Installation And Operation Manual page 154

1:1 redundancy switch, accessory product for use only with comtech ef data cdm-qx/qxl and slm-5650/5650a modems (modem firmware and hardware requirements apply)
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CRS-311 1:1 Redundancy Switch
Appendix A
A.3.7
Control 'Y' Overhead Cable for CRS-351 to SLM-5650/5650A (DB-50M to 2X DB-25F)
This  cable  (Figure  A‐10)  connects  the  CRS‐351  Overhead  Module  on  the  CRS‐311  to  the  SLM‐5650/5650A  Redundant  and  Traffic  Modem  "P1 
Overhead Data" ports. Use this cable as needed for protection of the overhead signals (backward alarms, audio ESC, data ESC, etc.). 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Figure A-10. SLM-5650/5650A Control 'Y' Overhead Cable (CEFD P/N CA-0000006)
A-12
Revision 7
MN/CRS311.IOM

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