rev1 – Dec 2013 www.digitalcomtech.com 9
Care and Caution
Operating Temperature
Due to the limitations on the operation of the Lithium polymer battery, the temperature while charging the battery
must be 0ºC to 45ºC, and the regular operating temperature must be -20ºC to 70ºC. For more information about the
Lithium polymer batteries, visit:
http://en.wikipedia.org/wiki/Lithium-ion_polymer_battery orhttp://www.batteryuniversity.com/parttwo-34.htm
How to remove SIM Card
Always send an >SRT< command before removing the SIM card, due to the risk of possible damage to the SIM
card. Follow these steps in order to prevent these issues:
- Send a Reset (>SRT< command) via Serial port.
- Remove SIM card after sending the >SRT< command. That means you have around 10 seconds to
remove the SIM card.
How to remove the internal battery
Always send a >SRT< command before removing the battery if the external power supply is not connected, due to
the risk of possible data loss or data corruption in the device memory. Follow these steps in order to prevent these
issues:
- Send a Reset (>SRT< command) via Serial port.
- Remove the battery after sending the >SRT< command. That means you have around 10 seconds to
remove the battery.
If the external power supply is connected, the battery can be replaced without sending the >SRT< command.
Set up the correct PIN for the SIM card.
The SIM card may be blocked if the PIN parameter is configured using the >SRFI< command with a wrong SIM
card PIN.
Do Not Leave These Wires Unprotected
All the wire end tips must be kept insulated when not in use to prevent damage and undesired behavior on the unit.
This is especially important for the following wires:
o Pin 7 - Green
o Pin 8 - Orange
o Pin 14 - White/Red
For more details of each wire, please consult the Inputs/Outputs section.
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