Comtech EF Data SMS-458B - Manual (Page 47)

SMS-458B Modem Protection Switch Revision 2
Operation MN/SMS458B.IOM
3–11
3.4.3.1 Downlink Selection Menu
Note: Hardware connections for uplink and downlink must be identical to the setup
selection. Any difference causes erroneous switch operation.
This menu displays the current downlink number (1 through 4) for each demodulator.
1. Enter the number of the downlink selected.
2. Press [ENT] (that information is loaded into memory).
3. If no downlink is selected for an active demodulator, an M:N fault results.
3.4.3.2 Demodulator Priorities Menus
These menus display the current priority level for all prime demodulators:
• “1” indicates high priority.
• “2” indicates medium priority.
• “3” indicates low priority.
1. Enter priority level and press [ENT] (the information is loaded into memory).
2. If nothing is entered, the priority will be 3 (low priority).
Note: The backup algorithm uses priority levels to make backup decisions. When a
backup demodulator is online for a faulted prime with a lower priority than a newly
faulted demodulator is, that backup modem becomes available for use to backup the
newly faulted unit having the higher priority.
3.4.3.3 Modulator Priorities Menus
These menus display the current priority level for all prime modulators.
• “1” indicates high priority.
• “2” indicates medium priority.
• “3” indicates low priority.
1. Enter priority level and press [ENT] (the information loads into memory).
2. If nothing is entered, the priority will be 3 (low priority).
Note: The backup algorithm uses priority levels to make backup decisions. When a
backup modem is online for a faulted prime with a lower priority than a newly faulted
modem, that backup modem becomes available for use to backup the newly faulted unit
having the higher priority.