Comtech EF Data CRS-300 - Manual (Page 279)

CRS-300 1:10 Redundancy Switch MN/CRS300.IOM
Appendix B Revision 19
B-33
B.4.16 Modem-to-User, Optional T1/E1 Adapter for CDM-570/A, CDM-570L/AL, CDM-600/L
(DB-15MRJ-48F)
You may use this optional adapter to convert the Type ‘D’ 15-pin female Balanced G.703 data connector on the User side of the Switch
TMI to a standard RJ-48 female port for T1/E1 operation.
Figure B-28. Optional T1/E1 Adapter (CN-0000268)