Diagnostics - TrimTrac ProE Locator Technical Manual

up. The SIM PIN setting is stored in the firmware and is used if the SIM requests
it. If so requested, the SIM PIN is used to attempt to unlock the SIM. If the
unlock fails, the SIM PIN is marked as having caused a failure and not retried
until the user physically connects the TrimTrac ProE to a Provisioning Module
and uses the AT+CKTP command to change the SIM PIN. This is to prevent the
SIM from becoming unusable after 10 SIM PIN failures. The SIM PIN cannot be
read back once set. It can only be overwritten.
Configuration Security
The configurable parameters are divided into two groups, the provisioning group
and the read/write group.
The provisioning group includes parameters that can only be read, but not
changed. They are set at time of manufacturing or, in some cases, at time of
provisioning. The values such as the IMEI Number and Firmware Version are
written at time of manufacturing. The SMS Destination Address is written at time
of provisioning or can be changed over the air using the SET_PROV_CONFIG
message.
The read/write group depicted in Table 99, Read-only Parameters on page 200
includes operational parameters that are changed as a part of the normal operation
of the TrimTrac ProE. Sending a TrimTrac Application message to the TrimTrac
ProE via the GSM network can change all these values. Using these messages the
server application can change the functionality of the TrimTrac ProE. The
communication security methods will protect these values from being changed by
an unauthorized user.

Diagnostics

When the Diagnostics Mode is enabled and set to 1 (LED) the LED on the
TrimTrac ProE will blink at different rates depending on the TrimTrac ProE's
operational state. If the TrimTrac ProE is powered off the LED is off. Once the
battery charge drops to 10% or below, the LED turns red remains on in all states
except the DELAY State when the LED is turned off. Please see Table 50 for a
full description of LED blink rates.
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