Service manual

Security Information
To stop unauthorized personnel using your SIM card, the option of using a Personal
Identity Number (PIN) is available. When enabled the option requires (on power up) a
verification number to be entered via the unit’s keypads, before the card can be used.
Three attempts to enter the correct PIN may be made. If after the three entries the correct
PIN has not been entered, the card becomes blocked. To unblock the card an
unblocking/supper PIN code must be entered. Ten attempts to enter the correct
unblocking code are permitted, if after ten attempts the correct code has not been entered,
the SIM card is corrupted and becomes useless.
Another option available for the SIM card is call barring. If subscribed to, the call barring
of incoming and/or outgoing calls may be accomplished by entering a special key
sequence. The key sequence includes a “barring code”, which determines the type of
restriction incorporated, and a password to validate the request. The initial password is
provided when
you subscribe to the service. The password can be changed by entering a set key
sequence.
A valid standard mini SIM card can be used in any working GSM transceiver, regardless
of the manufacturer, which is compatible with the standard mini size SIM card.
To protect the actual unit from unauthorized use, a lock function on the hardware is
available. When enabled, this function requires that a three or four digit unlock code be
entered, via the units keypad, before normal operation of the transceiver can take place.
The lock code can be changed by entering a set key sequence.
Further information on set sequences can be derived from the unit’s User Gude.