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CRS-180 70/140 MHz IF 1:1 Redundancy Switch
Introduction
Modem
CDM-625/A
CDM-760
CDM-750
CDM-570A
CDM-570A with Optional IP Packet
Processor
CDM-570
CDM-570 with Optional IP Module
CDM-710G
CDM-710
CDM-700
* Firmware updates are free and may be downloaded from the Comtech EF Data web site
(http://www.comtechefdata.com). If a modem does not meet the hardware requirements,
contact Comtech EF Data Product Support. Hardware revision upgrades must be performed
at CEFD.
1.2
Physical Features
1.2.1
Modem Side Features
Figure 1-2 shows the modem side of the CRS-180. The connectors provided here facilitate all
necessary external connections between the CRS-180 and the compatible Comtech EF Data
modems.
Ref Des
J1
J2
J3
J4
J5
J6
Table 1-1. CRS-180 Compatibility Summary
1:1 Data Switch
Built into the CDM-625/A
Built into the CDM-760
Built into the CDM-750
Built into the CDM-570A
User-provided Layer 2 switch or hub
Built into the CDM-570
User-provided Layer 2 switch or hub
Built into the CDM-710G
Built into the CDM-710
Built into the CDM-700
J6 Tx B
J5 Tx A
Name
Connector Type
Rx A
BNC
Rx B
BNC
Control A
DB-9F 9-pin Type 'D' female
Control B
DB-9F 9-pin Type 'D' female
Tx A
BNC
Tx B
BNC
Figure 1-2. CRS-180 – Modem Side Features
J3 Control A
J2 Rx B
J4 Control B
Function
IF Input to Modem 'A'
IF Input to Modem 'B'
Modem 'A' Control Interface
Modem 'B' Control Interface
IF Output from Modem 'A'
IF Output from Modem 'B'
1–2
MN/CRS180.IOM
Revision 11
Firmware/Hardware Requirement*
Firmware Ver. 1.1.1 or higher
Firmware Ver. 1.1.1 or higher
Firmware Ver. 1.1.1 or higher
Firmware Ver. 1.1.1 or higher
Firmware Ver. 1.2.1 or higher
• Firmware Ver. 1.6.7 or higher
• Hardware Revision 3
Firmware Ver. 1.5.4.2 or higher
Firmware Ver. 5.1.1 or higher
• Firmware Ver. 2.4.1 or higher
• Hardware Revision 3
• Firmware Ver. 1.1.6 or higher
• Hardware Revision 3
J1 Rx A
Chapter Sect.
3.2.1.1
3.2.1.1
3.2.1.2
3.2.1.3
3.2.1.1
3.2.1.1
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