Device for and method of terminating a voip call

Details Device for and method of terminating a voip call Device for and method of terminating a voip call

H - Electricity

04

L

H04L 12/66 (2006.01) H04M 3/533 (2006.01) H04M 11/06 (2006.01) H04Q 3/00 (2006.01) H04Q 3/64 (2006.01)

Patent

CA 2551586

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) de-termining 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.

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