Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...
Reexamination Certificate
2005-12-27
2005-12-27
Chan, Wing (Department: 2643)
Telephonic communications
Telephone line or system combined with diverse electrical...
Having transmission of a digital message signal over a...
C379S093050
Reexamination Certificate
active
06980630
ABSTRACT:
The present invention teaches the use of a telephone keypad to control operations of an internet/telephone call switching device. Using the present invention, a user can switch from modem usage of a telephone line to receipt of an incoming call, and can switch back to the Internet Service Provider (ISP) with minimum difficulty when the call is terminated. Uniquely, set-up, programming and operations of the present device may be controlled by means of DTMF tones received from the telephone keypad. Operations may be remote, local, the DTMF decoder may be external or internal to the device, codes may be stand alone or only operant in a “command mode”, the device may use DSP, fuzzy logic, look-up tables or other means to decode the DTMF signals. The command code filter may be implemented as hardware or as software. One command code may be a security code preventing unauthorized access and control of the device's operations, set-up, programming or usage.
REFERENCES:
patent: 5056132 (1991-10-01), Coleman et al.
patent: 5062133 (1991-10-01), Melrose
patent: 6317488 (2001-11-01), DePond et al.
patent: 6377668 (2002-04-01), Smock et al.
patent: 6594350 (2003-07-01), Tang
patent: 6731726 (2004-05-01), Kerner et al.
patent: 6768791 (2004-07-01), Olafsson et al.
Bond Schoeneck & King , PLLC
Chan Wing
McGuire George R.
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