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CDM-740 Advanced Satellite Modem
1:1 Redundancy
From the Utilities: menu branch, select 1:1 using the ◄ ► arrow keys, then press ENTER
The CDM-740 automatically detects the presence of a CRS-175L L-Band 1:1 Redundant Switch.
If Utility: 1:1 is selected and this unit is currently online and part of a 1:1 redundant modem pair
operating in tandem with a CRS-175L switch, the user is prompted to press ENTER (as indicated
above); this command then automatically forces the switchover of operation to the backup
(standby) modem.
If, however, 1:1 is selected from the Utility menu branch and no CRS-175L switch is detected,
the following error message displays:
An important note about 1:N redundancy selection: The CDM-740 presently does not
accommodate 1:N redundant operations; therefore, while selectable, this submenu is non-
functional. If, however, 1:N is selected from the Utility menu branch – regardless of the presence
of a CRS-175L switch – the following error message displays:
C.3.2.2
Redundancy Operation via Telnet Remote Control
The user can effect 1:1 redundancy switchover using a terminal-based Telnet interface. Using the
FSW remote control command via Telnet remote control is equivalent to the front panel SELECT:
Utility
1:1 (ENTER) command. Observe the following:
Parameter
Type
Force 1:1 Switch
For complete details on using remote monitor and control commands and quieries, refer to
Appendix A. REMOTE CONTROL in this manual.
Press ENTER key to force unit into
Standby (1:1 only)
... Error ...
No Valid Redundancy
... Error ...
No Valid Redundancy
Command
(Instruction
Description of Arguments
& Qualifier)
Command only.
FSW=
This command takes no arguments. Forces the unit to toggle the Unit Fail relay to the
"fail" state for approximately 500ms.
If the unit is a 1:1 pair and it is currently the 'Online' unit, this forces a switchover so the unit
will then be in 'Standby' mode.
The command is always executed by the unit regardless of whether it is stand-alone, or in a
1:1 pair.
C–7
Revision 0
MN-CDM740
.
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