Comtech EF Data RCS20 - Manual (Page 45)

RCS20 M:N Redundancy Switch Revision 15
User Interfaces MN-RCS20 and CD-RCS20
4–11
4.3.1.5 MODEM 9 / BACKUP 2 MODE
This screen allows the user to select the mode operation for Channel 9. The channel 9 modem can
operate as a prime, a preemptable prime, or a dedicated backup.
4.3.1.5.1 Programming steps:
1. Press to configure Channel 9 as a dedicated backup channel. The switch parameter
table will be updated immediately. In this mode, Channel 9 cannot be used as a prime channel,
and Modem 9 will not be connected to up/down converters.
2. Press to configure Channel 9 as a preemptable prime channel. The switch
parameter table will be updated immediately. In this mode, Channel 9 will normally carry low
priority data, but will drop the low priority data channel and serve as a backup if any of the
modems on the dedicated Prime Channels 1 tthrough 8 fail.
3. Press to configure Channel 9 as a dedicated prime channel. The switch parameter
table will be updated immediately. In this mode, Channel 9 will be connected to an up/down
converter and will work the same as the other dedicated prime channels. Also, Channel 9 data
and IF will be switched to the backup channel if the modem connected to Channel 9 fails.
Key Label Function
S1 BACKUP Press to Channel 9 as a dedicated backup channel.
S2 PREEMPT Press to configure Channel 9 as a preemptable prime channel.
S3 TRAFFIC Press to configure Channel 9 as a dedicated prime channel.
S4 RETURN Press to return to the Modem 9 / Backup 2 Configuration Screen.
Numeric Keypad --- N/A
MODEM 9 / 2 CONFIGURATION
MODE: BACKUP