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:
Jul. 10, 2012
Filed:
Jul. 07, 2006
Mads Emborg, Kanata, CA;
Mads Emborg, Kanata, CA;
Avaya Canada Corp., Halifax, CA;
Abstract
The invention relates to the field of voice over Internet protocol (VoIP) and more specifically to a system and method of terminating a VoIP call. In certain exemplary embodiments, the present solution provides in a voice over Internet protocol (VoIP) network, a method of terminating a call received from a public switched telephone network (PSTN) phone by a session initiation protocol (SIP) phone via a PSTN gateway, in the absence of a terminating signal from the PSTN gateway, the method comprising: (a) receiving at said SIP phone a sequence of codec frames from said PSTN gateway; (b) determining if a specified portion of each codec frame in said received sequence of codec frames is a specified value; (c) if said specified portion is said specified value, incrementing a counter by an incrementing amount; and (d) when said counter reaches a specified threshold, terminating said call In the absence of a BYE message, session termination of a VoIP call can still be facilitated using the method and apparatus of the present invention.