Telephonic communications – Supervisory or control line signaling – Substation originated
Patent
1998-05-28
2000-05-09
Chan, Wing F.
Telephonic communications
Supervisory or control line signaling
Substation originated
379220, H04M 100
Patent
active
060614439
ABSTRACT:
A method and apparatus for unified overlay dialing enables simplified telephone dialing to occur within a standard overlay area and eliminates disruption dealing with area code saturation. Each three-digit area code within an overlay area is associated with a single-digit suffix, with the parent area code obtaining the suffix "0". Intra-overlay area dialing then proceeds on the basis of a seven digit number plus a one-digit suffix, rather than a full 1+10-digit number. For dialing to the parent area code from within the overlay area, the suffix may be omitted entirely, and the expiration of a suitable timing delay causes the seven digit number provided to be dialed into the original (parent) area code. This method can be implemented in connection with a telephone company central office switch, a modified custom calling service or be made accessible to individual telephone subscribers using computerized customer premises equipment. It can also be used to simplify dialing in non-overlaid situations.
REFERENCES:
patent: 5768358 (1998-06-01), Venier et al.
patent: 5917902 (1999-06-01), Saucier
patent: 5946390 (1999-08-01), Boakes
Chan Wing F.
Yablon Jay R.
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