Comtech EF Data CRS-300 - Manual (Page 264)

CRS-300 1:10 Redundancy Switch MN/CRS300.IOM
Appendix B Revision 19
B-18
B.4.1 Switch-to-Modem / Switch-to-User, EIA-232/422, EIA-530 Control and Data Cable
(DB-25MDB-25F)
You may use this Type ‘D’ 25-pin cable for EIA-232/422, EIA-530 data connections between the Switch and Modem or between the
Switch and the user data.
Figure B-13. EIA-232/422, EIA-530 Control and Data Cable (CA/WR0066)