Modem Side Connectors; Table 1-1. Crs-180 Application Summary; Figure 1-2. Crs-180 - Modem Side Connectors - Comtech EF Data CRS-180 Installation And Operation Manual

CRS-180 70/140 MHz IF 1:1 Redundancy Switch
Introduction
Modem
CDM-625
CDM-750
CDM-570
CDM-570 IP Module
CDM-700
CDM-710
CDM-710G
* Firmware updates are free and may be downloaded from the Comtech EF Data
web page. If a modem does not meet the hardware requirements, contact CEFD –
hardware revision upgrades must be performed at CEFD.
1.1.1

Modem Side Connectors

The modem side connectors, shown in Figure 1‐2 and outlined in the accompanying table, provide
all necessary external connections between the CRS‐180 70/140 MHz IF 1:1 Redundancy Switch
module and the specified Comtech EF Data modems.
J6 TX B
Name
RX A
RX B
TX A
TX B
Control A
Control B

Table 1-1. CRS-180 Application Summary

1:1 Data Switch
Built into the CDM-625
Built into the CDM-750
Built into the CDM-570
User-provided hub or Layer 2 switch
Built into the CDM-700
Built into the CDM-710
Built into the CDM-710G
J5 TX A J3 Control A
J4 Control B
Ref Des Connector Type
J1 BNC
J2 BNC
J5 BNC
J6 BNC
J3 9-pin 'D' (female)
J4 9-pin 'D' (female)
Figure 1-2. CRS-180 – Modem Side Connectors
1–2
Other Information*
Firmware 1.1.1 or higher
Firmware 1.1.1 or higher
• Firmware 1.6.7 or higher
• Hardware Revision 3
Firmware 1.5.4.2 or higher
• Firmware 1.1.6 or higher
• Hardware Revision 3
• Firmware 2.4.1 or higher
• Hardware Revision 3
Firmware 5.1.1 or higher
J2 RX B J1 RX A
Function
IF Input to Modem 'A'
IF Input to Modem 'B'
IF Output from Modem 'A'
IF Output from Modem 'B'
Control Interface with Modem 'A'
Control Interface with Modem 'B'
Revision 8
MN/CRS180.IOM