said tone pair corresponding to one of said unique DTMF tone pairs
associated with one of said numeric buttons, is sent to said network on
activation of said each of said plurality of character buttons.
Bhagavatula Claim 5
A telephone station set connectable to a telephone network, said telephone comprising:
a base;
a plurality of buttons on said base,
each of said plurality of buttons causing an output to said network when pressed;
said plurality of buttons being organized into a plurality of button groups, each
button group comprising selected ones of said plurality of buttons,
every button in each of said button groups causing the same output to said
network when pressed; and
buttons in different ones of said plurality of button groups causing different
outputs to said network when pressed.
Bhagavatula Claim 7
A telephone set comprising:
a tone generator,
a numeric keypad
having a plurality of first buttons;
connection means
for interconnecting each of said first buttons to said tone generator and for
delivering directly to said tone generator, in response to activation of each one of
said first buttons, a distinct indication identifying the one first button;
said tone generator producing, in response to each said distinct indication, a dual tone
multi-frequency output, unique to the identified first button;
a character keypad having a plurality of second buttons;
each of said second buttons being connected directly to the connection means
interconnecting each of said first buttons to said tone generator, such that
activation of each of said second buttons produces one of said distinct indications
unique to one of said first buttons, and
such that activation of any one of a subset of said second buttons produces the
same one of said distinct indications.
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Last modified: November 3, 2007