Multiplex communications – Communication techniques for information carried in plural... – Adaptive
Reexamination Certificate
2007-11-20
2007-11-20
Rao, Seema S. (Department: 2616)
Multiplex communications
Communication techniques for information carried in plural...
Adaptive
C370S270000, C370S352000, C370S395210, C370S465000, C379S265050
Reexamination Certificate
active
10676971
ABSTRACT:
A system for assuring quality-of service for Data Network Telephone (DNT) calls, such as Internet Protocol Network Telephony (IPNT) calls has software for monitoring established DNT calls for adequate bandwidth. A threshold bandwidth, or parameter value related to bandwidth is stored, and tests are periodically made on the DNT call path and compared to the threshold. If the available bandwidth falls below the threshold, an alternative conventional call, such as a PSTN or ISDN call is made to replace the DNT call. Once the alternative call is established, the original call is ended. After the original call is ended, tests of the DNT path continue, and, in some cases, if adequate DNT bandwidth becomes available, the call is switched back to DNT. In some cases, alerts are posted for call participants, and provision is made for approval by one or both participants in a call for a switch in service type to be made.
REFERENCES:
patent: 6363079 (2002-03-01), Barzegar et al.
patent: 6628666 (2003-09-01), Pickering et al.
U.S. Appl. No. 09/050,673, filed Mar. 30, 1998, Richard Pickering et al.
Gisby Douglas
Pickering Richard B
Baron Henry
Boys Donald R.
Central Coast Patent Agency Inc.
Genesys Telecommunications Laboratories Inc
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