06363065 is referenced by 328 patents and cites 5 patents.

Apparatus, and accompanying methods for use therein, for a telephony gateway intended for use, e.g., paired use, at opposite ends of a data network connection, in conjunction with at each end, e.g., a private branch exchange (PBX) for automatically routing telephone calls, e.g., voice, data and facsimile, between two peer PBXs over either a public switched telephone network (PSTN) or a data network, based on, among other aspects, cost considerations for handling each such call and called directory numbers, monitoring quality of service (QoS) then provided through the data network and switching (“auto-switching”) such calls back and forth between the PSTN and the data network, as needed, in response to dynamic changes in the QoS such that the call is carried over a connection then providing a sufficient QoS. To support auto-switching, the apparatus embeds, using call independent signaling, certain call-specific information, as non-standard data, within various conventional H.323 messages that transit between the paired gateways. Furthermore, for added local redundancy, this apparatus utilizes peered border elements within an H.323 administrative domain.

Title
okApparatus for a voice over IP (voIP) telephony gateway and methods for use therein
Application Number
9/437644
Publication Number
6363065 (B1)
Application Date
November 10, 1999
Publication Date
March 26, 2002
Inventor
Ki Choon Suh
Middletown
NJ, US
Rajiv Bhatia
Marlboro
NJ, US
Timothy R Thornton
Brick
NJ, US
Agent
Michaelson & Wallace
US
Agent
Peter L Michaelson
US
Assignee
Quintum Technologies
NJ, US
IPC
H04L 12/66
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