Comtech EF Data CRS-500 - Manual (Page 67)

CRS-500 1:N Redundancy System Revision 2
Cables and Connections MN-CRS500
4–11
4.3.1.2 CRS-500

CDM-625 Control Cable Connections
For 1:N connections between the CRS-500 CSU to CDM-625 Modems: The CA/WR0066 Control
Cable (DB-25M to DB-25F, 6’) or CA-0000069 Control Cable (HD-15M to DB-9M, 6’) provide the
modem’s fault status information to the CRS-500 as well as the control path to the modem’s
external Tx IF-mute (for the offline modem), so therefore it is always required.
Referring to Figure 4-4:
• First, for the Redundant Modem, connect the CA/WR0066 Control Cable between the
Redundant Modem and its corresponding RMI as follows:
o
DB-25F connector labeled “Data Interface” on the modem, to
o
DB-25M connector labeled “P1” on the RMI.
• Then, for each Traffic modem, connect a CA-0000069 Control Cable between each TMI
and its corresponding Traffic Modem as follows:
o
HD-15F connector labeled “Faults” on the TMI, to
o
DB-9F connector labeled “1:1 Control” on the modem.