Method to improve fax transmission quality over packet based networks with significant delay and packet jitter using protocol re-timing

摘要

A method and apparatus to improve fax quality when transmitting fax over packet based network with significant delay and packet jitter. The method is based on adjustment to the protocol timing between a "receiving Gateway" and the receiving Group 3 Facsimile Equipment (G3FE). The protocol adjustment is applied when operating facsimile transmission over Internet to increase the success rate for transmission of facsimile via T.38 or similar facsimile relay protocols. The method ensures that network delay and packet jitter do no result in certain violation of timing constraints defined by the T.30 protocol between a "receiving Gateway" and receiving G3 Fax Terminals.