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Serial Pin Power Control
ATC
Watchdog
The UT can be switched off by applying a voltage to pin 9 of the
DB9 serial port.
If you apply voltage to Pin 9 of the serial port with pin 5 as
Ground, the UT will power down. It will power up when you
remove the voltage.
The voltage can be 2.5V to 50V. 12V is the recommended level.
The UT includes an L band scanning mode to detect Auxiliary
Terrestrial Component (ATC) or other sources of external
interference. The terminal can be commanded into scanning mode
by the Web UI, AT command or SMS command. During the scan
the terminal will be offline to the BGAN network and will
automatically reboot to return to normal operation.
In scanning mode the terminal measures the received signal
strength across the 34MHz of L-band spectrum (1525 to
1559MHz). Once the scan is complete the UT restarts and
communicates the results of the scan.
If an interference signature is detected, an attenuator is switched
into the receiver path to attempt make the UT more resilient to
ATC interference.
The attenuator setting can be controlled from the Web UI, AT
command or remote SMS.
The M2M terminal includes a watchdog mechanism that can be
used to periodically verify the UT network connectivity and take
action if a problem is detected. The UT will periodically attempt to
send a ping to one of three pre-configured IP addresses. If all the
pings fail, the UT will attempt to recover connectivity. If this fails,
the UT will reboot.
The ping mechanism will also act as a keep alive on the PDP
context to prevent it from being torn down.
Configuration Parameters are shown in the M2M Page section.
17
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