TrimTrac ProE Locator, Technical Manual

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TrimTrac ProE Locator Technical Manual v2.0e 46
A final consideration on whether or not to enable polling is that network operators
make changes on the GSM network from time to time that require mobile devices
to be turned off and then powered back up before such changes take effect. If the
modem is left on continuously due to polling being enabled, then this power
cycling will not happen automatically.
Enabling any polling capability will have a significant impact on power
consumption. Setting the Anytime Polling to “2=Anytime OnDemand” will limit
the life of four AA alkaline batteries to no more than 1-2 days depending upon
how frequently the GSM network pings the device for registration information.
Therefore, any polling mode, except perhaps for Cycled Polling, is best reserved
for those TrimTrac ProEs using a Vehicle Adapter or Control Module while
connected to an external source of 12VDC power.
Example Applications
Baseline (Default) Application
TrimTrac ProE default values are based upon two trips per day (frequency) with
each trip being one hour in length (duration). Market research studies indicate
that most end-user consumers believe a nominal 15-minute position reporting
interval while the vehicle is moving is a good combination of timely information,
reasonable SMS communication costs, and battery life.
This baseline application scenario, assuming good GPS signal strength and GSM
coverage, will yield 10 position reports per day plus one or two status messages
each day, depending upon how the two trips are spaced out over the course of a
day. Typically, four AA alkaline batteries will last for up to 90 days before they
would need to be replaced under this application scenario using factory default
settings.
Command to Return Unit to Default
Configuration and Clear the Message Log
See
Page
AT+CTKE=3 119
Table 13, Provisioning Command for Default Configuration Settings and Log Clearing
Note: Clearing the Message Log does not reset the Report Sequence Number.