Two related voiceband compression techniques are employed in order to enable an RF telecommunications subscriber unit to accommodate data signals of high speed voiceband modems and FAX machines. A High Speed Codec enables the subscriber unit to pass voiceband modem and FAX transmissions at up to 9.6...http://www.google.com.au/patents/US6574207?utm_source=gb-gplus-sharePatent US6574207 - Method for subscriber unit compressing and transmitting high speed data
