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RCS20 M:N Redundancy Switch
User Interfaces
4.3.2.9.4
CARRIER-IN-CARRIER MODEMS
This screen allows the user to use the RCS20 redundancy switch with CnC-capable Radyne/
Comtech EF Data modems.
The modems that are currently supported are as follows:
Modem Model Number
DMD20
DMD50
DMD2050
DMD2050E
Programming Steps for setting up the link:
1. Establish a link from the prime channel to the far end modem using TX IF = RX IF and CnC
2. Learn Prime Modem
3. Test Prime Modem
4. Set BU modem to IF LOOPBACK
5. Verify no alarms
In Carrier and Carrier switching mode the RCS20 does NOT support Independent
Modulator and demodulator Switching as seen in Section 4.3.1.6 (Modem
Switching Style). Also, on the RCS20 you will want to set the Mod and Demod
Fault Delay (Sections 4.3.1.9.4 and 4.3.1.9.5) to 5 seconds minimum. You will
also need to set the Demod Acquisition Delay (Section 4.3.9.6) to a minimum of
30 seconds. This will account for the time it may take for CnC to properly
acquire.
Also note that the modems listed above must be configured to use the Base
Band Relays in CnC 1:1 SWITCH mode. This menu entry on the modems listed
above can be found under the Menu: INTERFACE -> GENERAL ->BB RELAYS
{CnC 1:1 SWITCH}.
CARRIER-IN-CARRIER MODEMS
C N C S W I T C H I N G :
Y E S
C N C
Minimum Level of M&C Firmware needed
F05058-CF (9.4)
F05585-AF (4.2)
F05280-AF (4.2)
F05280-AH (4.4)
4–53
N E X T
Rev. 14
MN-RCS20
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