Installation guide

LMU Users Guide

V1.0.6 December 10 2009

- 59 - CalAmp Proprietary & Confidential

Because the password is stored in a Short Text String it is limited to 15 alpha numeric ASCII

characters.

To enable this feature you would use:

AT$APP PARAM 1024,51,16,16

To disable this feature you would us:

AT$APP PARAM 1024,51,16,0

Be aware that this password also applies to AT Commands sent via SMS. To remotely

unlock an LMU via SMS you would use a variant of the !R0 SMS message.

!R0P<password>

The sending phone number will then be cleared to process any AT Commands over SMS

until the LMU is either power cycled, or it receives an unlock command via SMS from a new

phone number. As a result, only one phone number can have remote AT Command access

to an LMU at a time.