The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 14, 1999
Filed:
Dec. 05, 1996
Applicant:
Inventors:
Assignee:
Nortel Networks Corporation, Montreal, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04M / ;
U.S. Cl.
CPC ...
379373 ; 379 9301 ; 455414 ;
Abstract
In a multi-service wireless, or wired, integrated services digital network, the type-of-call information in a call setup message may indicate the call is a voice call, a fax call or a data call. This information is used to generate a distinctive ring at the called subscriber unit, provided the called subscriber unit is not busy with another call. If the called subscriber unit is busy with a voice call, then a distinctive call waiting tone signal is generated based on the type-of-call information.
Zhang, Genzao. (1999). Distinctive ringing and distinctive call-waiting tones in an isdn (U.S. Patent No. 5953407). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5953407
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