Modem-To-Switch Control Interface Connection - Comtech EF Data CRS-170A Installation And Operation Manual

CRS-170A L-Band 1:1 Redundancy Switch
Cables and Connections

5.11.1.1 Modem-to-Switch Control Interface Connection

1) Excluding the modems, the KT/12551 CRS-170A L-Band 1:1 Redundancy Kit (Section
5.2.2) provides all components shown in Figure 5-57.
2) When you connect the Control Interface cables between the CRS-170A and the modems,
make sure that you securely fasten the screw locks on the Type 'D' connectors. This
prevents accidental disconnection of the cables, particularly when you are removing and
replacing a standby unit.
CEFD Part No.
CA/WR12135-1
See Notes
FIGURE NOTES:
1) To provide user access to the modem "Fault Summary Relay," Control 'Y' Cable
(CEFD P/N CA/WR13011-4), sold separately, is available for use in place of the
CA/WR12135-1 Control Cable.
2) The CA/WR12135-1 Control Cable will mute the Offline modem's Tx IF. If this is not
desired, then an alternate Control Cable (CEFD P/N CA-0000187), sold separately,
is available for use instead.
Figure 5-57. CDM-700 Modem-to-Switch Control Connections
Qty Description
2 Control Cable – Universal, DB-9M, 4'
5–70
MN/CRS170A.IOM
Revision 14