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4.4 The ‘Remember PIN’ feature
This feature is intended to allow the router to automatically send the PIN to the USIM each time the USIM
asks for it (usually at power up).
The intent of this feature is to ensure that a USIM removed from a router installed in an unattended location
by an unauthorized user cannot be used to make calls or otherwise be of any value outside the router on
which it is installed.
When this feature is enabled the PIN entered by the user when they set the "Remember PIN" feature is
encrypted and stored locally in the cellular router, the next time the USIM asks the cellular router for the
PIN the cellular router decrypts the PIN and automatically sends it to the USIM without user intervention.
When this feature is disabled and the USIM is PIN locked the user must manually enter the PIN via the
cellular router‘s configuration interface, this is clearly not desirable where the cellular router is unattended.
Revision 1.55 NetComm Limited
March 2009
18