CRS-300 1:10 Redundancy Switch MN/CRS300.IOM
Cables and Connections Revision 19
4–4
4.2 Switch-to-Switch Connections
If your redundancy system requires the Comtech EF Data CRS-280 (70/140 MHz) IF, CRS-280L
(L-Band) IF, and/or CRS-350 Engineering Service Channel (ESC) Switch (for use only with the
CDM-600/L, CDM-625/A, or SLM-5650/5650A modems), you need to use Control/Data Cable
CA/WR0066 to connect the Switches. Comtech EF Data provides this cable with each Each
CRS-280/280L and CRS-350 Switch.
The sections that follow explain the switch-to-switch cable connections that you must make
between the CRS-300, CRS-350, and the CRS-280/280L.
4.2.1 CRS-300 to CRS-280/280L Connection
See Figure 4-1 or Figure 4-2 and do these steps to connect and secure the CA/WR0066 cable
between the CRS-300 and the CRS-280/280L:
• DB-25M connector labeled “IF Switch Control” on the CRS-300’s CRS-230 System Controller,
to
• DB-25F connector on the rear panel of the CRS-280/280L.
4.2.2 CRS-300 to CRS-350 Connection
See Figure 4-3 and do these steps to connect and secure the CA/WR0066 cable between the
CRS-300 and the CRS-350:
• DB-25M connector labeled “IF Switch Control” on the CRS-300’s CRS-230 System Controller,
to
• DB-25F connector on the rear panel of the CRS-350.
4.2.3 CRS-300 to CRS-350 and CRS-280/280L Connection
See Figure 4-4 or Figure 4-5 and do these steps to first connect and secure the CA/WR0066
cable between the CRS-300 and CRS-350:
• DB-25M connector labeled “IF Switch Control” on the CRS-300’s CRS-230 System Controller,
to
• DB-25F connector on the rear panel of the CRS-350.
Next, do these steps to connect and secure the second 25-pin CA/WR0066 cable between the
CRS-350 and CRS-280/280L:
• DB-25M connector on the CRS-350, to
• DB-25F connector on the rear panel of the CRS-280/280L.
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