A communications link having a plurality of communication media is coupled between an originating facsimile machine and a terminating facsimile machine. The plurality of communication media includes a medium having a variable data transmission time followed serially by a media having a constant data...http://www.google.de/patents/US6160639?utm_source=gb-gplus-sharePatent US6160639 - Method and system for negotiating transmitting and receiving modes for transmitting facsimile data via a medium having a variable data transmission time
