CDM-625A Advanced Satellite Modem MN-CDM625A
Introduction Revision 4
1–9
1.3.8 Supporting Hardware and Software
Redundancy Support: Comtech EF Data provides redundant operations support to the
CDM-625A as follows:
• For 1:1 redundancy applications, via its low-cost external CRS-170A L-Band and CRS-180
70/140 MHz IF 1:1 Redundancy Switches.
• For M:N redundancy (hub) applications, via its external CRS-300 1:10 Redundancy Switch or
the CRS-500 M:N Redundancy System.
Transceiver Support: The CDM-625A is a companion product for Comtech EF Data’s CSAT-5060
and KST-2000A/B RF Transceivers. The modem incorporates a Frequency Shift-keying (FSK) serial
link that can be activated on the Rx-IF port for the purpose of communicating with a transceiver,
if connected. In this manner, you may configure, monitor and control the transceiver using
either the CDM-625A’s front panel display and keypad or any of its remote control interfaces.
The EDMAC channel may also be used to convey M&C data to a transceiver at the distant end of
a satellite link, if it is connected to a CDM-625A.
BUC Support: The CDM-625A incorporates an FSK serial link that can be activated on the Tx-IF
port for the purpose of communicating with an FSK-capable “smart” BUC. This link is designed to
be compatible with the Global VSAT Forum/ND SatCom specification. In this manner, you may
configure, monitor and control the BUC using either the CDM-625A’s front panel display and
keypad or any of its remote control interfaces.
Additionally, Comtech EF Data provides for an "Advanced FSK" for use with its LPOD BUCs, re-
using the existing FSK channel to pass additional "proprietary" commands to expand front panel
user control. The EDMAC channel can be used to convey M&C interface to a BUC at the distant
end of a satellite link, if it is connected to a CDM-625A.
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