Product specifications

CRS-170A L-Band 1:1 Redundancy Switch MN/CRS170A.IOM

Cables and Connections Revision 13

5–27

5.5 Cabling to the CDM-840

For information on the CDM-840’s 1:1 auto-enable functionality, see:

• Chapter 3. MODEM AND SWITCH CONFIGURATION

• CDM-840 Remote Router Installation and Operation Manual

(CEFD P/N MN-CDM840)

2) For information on the cables and cable assemblies specified in this section, see

Appendix A. CABLE DRAWINGS.

5.5.1 CRS-170A  CDM-840 Control and IF Interface Connections Using

Cabling Kit KT-0000160

You must order terrestrial data interface components/kits separately. See Sect.

5.5.2 for CDM-840 terrestrial data interface configuration and connection

examples and details.

You must use Comtech EF Data’s KT-0000160 1:1 Redundancy Control/IF Interface Cabling Kit

(Sect. 5.2.1) for your control and L-Band Unit-to-Switch cabling connections. Figure 5-23 and

Figure 5-24 show how to connect a pair of CDM-840s together with the CRS-170A L-Band 1:1

Redundancy Switch module. The table included with each figure lists the items you will need

from this kit for your initial setup.

CAUTION – It is ESSENTIAL that you make the control and the IF Rx and Tx

connections correctly

. See Sect. 5.5.1.1 for details about the CDM-840 Unit-to-Switch

Control Interface connection, and Sect. 5.5.1.2 for details about the CDM-840 Unit-

to-Switch IF Interface connections.