Comtech EF Data CRS-311 - Manual (Page 159)

CRS-311 1:1 Redundancy Switch Revision 7
Appendix A MN/CRS311.IOM
A-15
A.4.1 EIA-232/422, EIA-530 Control and Data Cable (DB-25M to DB-25F)
Use the EIA‐232/422, EIA‐530 Data Cable (Figure A‐12) to connect between the CRS‐311 and the Redundant and Traffic Modems, or between the
CRS‐311 and the User Data.
Figure A-12. EIA-232/422, EIA-530 Control and Data Cable (CEFD P/N CA/WR0066-4)