Device for setting and tone dialing a single telephone number
AssigneeWinbond Electronics Corp.
InventorJing-Yaun Lin
Life of this patent
Estimating the term…
Abstract
A device for setting and tone dialing a single telephone number includes a telephone number setting device to generate a digital signal corresponding to the binary equivalent of the digits of the telephone number to be set. A tone generator receives the digital signal generated and groups the digital signal into a predetermined number of bit groups. Each of the bit groups corresponds to one of the digits of the telephone number. The bit groups are accessed one at a time and a dual tone multi-frequency signal corresponding to the digit represented by the accessed bit group is generated by the tone generator and is directed to the telephone instrument.
Claims10
A device for setting a group of digits and for generating dual-tone multi-frequency signals corresponding to said group of digits, comprising:
- means for generating a digital signal corresponding to the binary equivalent of said group of digits;
- means for grouping said digital signal into a predetermined number of bit groups, each said bit group corresponding to one of the digits of said digit group;
- means for accessing said bit groups one at a time;
- and
- means for generating a dual tone multi-frequency signal corresponding to the digit represented by the accessed said bit group.
Dependencies are inferred from the claim text.