Comtech EF Data CRS-300 - Manual (Page 248)

CRS-300 1:10 Redundancy Switch MN/CRS300.IOM
Appendix B Revision 19
B-2
B.2.1 Switch-to-User, EIA-530-to-EIA-422/-449 Data Conversion Cable (DB-25MDB-37F)
This cable provides the EIA-530-to-EIA-422/-449 DCE conversion for connections between the Switch and the user data.
Figure B-1. DCE Conversion Cable – EIA-530 to EIA-422/-449