Appeal No. 1999-0877
Application No. 08/204,441
The claimed invention relates to the field of telephone
systems and telephone handsets, wherein a subscriber of the
system is issued a smart card which allows the subscriber to
use any handset which is configured for use in the system.
The subscriber carries the smart card with him, and merely
inserts the card in the handset to gain access to the system;
however, such a system also requires the subscriber to key in
the subscriber's own telephone number for verification. Often
the subscriber may have forgotten his assigned telephone
number, and for security reasons it is undesirable to label
even the subscriber's own handset with the telephone number in
printed form. Thus, the method and telephone set of the
claimed invention provides for delivering (and displaying) the
subscriber's own telephone number to the subscriber upon the
subscriber's request to do so. When the telephone is switched
on to activate the power supply the user must initially
insert the smart card into the reader and then use the keypad
to insert his PIN. When the subscriber keys in a request for
the subscriber's own telephone number, his telephone number is
delivered to the subscriber by being displayed on the display
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