Comtech EF Data SMS-758 - Manual (Page 53)

SMS-758 Modem Protection Switch Operation
MN/SMS758 Rev. 3 3–15
3.2.5 Operational Modes
The MODE menu selects the mode of operation. At power-up, the switch defaults to the
BYPASS mode unless:
•
It was in a different mode prior to loss of power.
•
The battery-backed memory was maintained.
The following modes of operation are available:
BYPASS All switching is halted. No change will take place until the switch is returned to
the AUTO, LOCAL, or REMOTE mode. No interruptions will occur in the data
flow of any modem already backed-up as a result of changing modes.
AUTOMATIC The M&C controls all switching.
LOCAL The on-site operator controls all switching.
REMOTE In REMOTE mode, all switching is controlled by a remote controller via the
remote interface. The on-site operator cannot select this mode of operation.
3.2.5.1 Bypass Mode
The BYPASS mode is recommended for configuration functions. It is the default
operating mode at power-up, if the switch was not programmed for a different mode
prior to loss of power, or if the battery-backed memory was not maintained. The switch
is not capable of performing any switching functions in the BYPASS mode. All
configuration and communication functions continue to operate, but no new backup
operation can take place. Any backup operation performed prior to selecting BYPASS
will remain in effect.
To enter the BYPASS mode, press [3] + [ENT] while in the MODE menu.
3.2.5.2 Auto Mode
The AUTO mode is the normal operating mode for the switch. Refer to the flowcharts in
Figures 3-3 and 3-4. If the switch was in this mode when power loss occurred, it will
return to this mode when power is restored. All previous backup status will be lost, but if
there are faults present when power is restored, the switch will backup those faulted
modulators and/or demodulators accordingly. Because the switch is communicating with
the prime and backup modems in this mode, response to keypad input and remote
communication may be delayed.
To enter the AUTO mode, press [1] + [ENT] while in the MODE menu.