Two related voiceband compression techniques are employed in order to enable an RF telecommunications base station to accommodate data signals of high speed voiceband modems and FAX machines. A High Speed Codec enables the base station to pass voiceband modem and FAX transmissions at up to 9.6 kb/s....http://www.google.com.au/patents/US7126934?utm_source=gb-gplus-sharePatent US7126934 - Method for base station compressing and transmitting high speed data
