Comtech EF Data CRS-311, Installation And Operation Manual

Page: 151 / 194

CRS-311 1:1 Redundancy Switch Revision 7
Appendix A MN/CRS311.IOM
A-9
A.3.4 EIA-485 Null Modem Cable (DB-9M to DB-9M)
Use this EIA ‐ 485 Null Modem Cable ( Figure A ‐ 7 ) with CDM ‐ Qx/QxL modems: At the CRS ‐ 311 end, attach this cable to the DB ‐ 9F “485 Pass ‐
through” connector on the CRS ‐ 230 System Controller Module. At the modem end, attach this cable either to the optional EIA ‐ 485 Multi ‐ Drop
Ribbon Cable (CEFD P/N CA ‐ 0000095, Figure A ‐ 4 ) or to the standard EIA ‐ 485 Multi ‐ Drop Shielded Cable (CEFD P/N CA ‐ 0000096, Figure A ‐ 5 ).
Figure A-7. EIA-485 Null Modem Cable (CEFD P/N CA/WR11419-1)