Comtech EF Data CRS-300 - Manual (Page 257)

CRS-300 1:10 Redundancy Switch MN/CRS300.IOM
Appendix B Revision 19
B-11
B.3.6 Switch-to-Modem, EIA-485 Null Modem Cable for CDM-Qx/QxL (DB-9MDB-9M)
You may use this cable as part of the Switch to CDM-Qx/QxL EIA-485 Multi-Drop daisy-chain. Connect one end of this cable to the Switch
CRS-230 System Controller “485 Pass-Through” connector, and the other end to one of the DB-9F connectors on either the standard
CA/WR11417-1 EIA-485 Multi-Drop Shielded Cable (Figure B-7) or the optional CA/RB11423-1 EIA-485 Multi-Drop Ribbon Cable (Figure
B-10) that interconnects the Modems.
Figure B-9. CDM-Qx/QxL EIA-485 Null Modem Cable (CA/WR11419-1)