Comtech EF Data CRS-311 - Manual (Page 163)

CRS-311 1:1 Redundancy Switch Revision 7
Appendix A MN/CRS311.IOM
A-19
A.4.5 Quad E1 Data Cable for CDM-Qx/QxL (DB-15F to 4X RJ-45)
Use the Quad E1 Data Cable (Figure A‐16) to connect the CRS‐311 RMI (CRS‐305) to the Redundant CDM‐Qx/QxL Quad E1 interface.
Figure A-16. CDM-Qx/QxL Quad E1 Data Cable (CEFD P/N CA/WR13018-2)