An inband signaling modem communicates digital data over a voice channel of a wireless telecommunications network. An input receives digital data. An encoder converts the digital data into audio tones that synthesize frequency characteristics of human speech. The digital data is also encoded to prevent...http://www.google.es/patents/US7286522?utm_source=gb-gplus-sharePatente US7286522 - Synchronizer for use with improved in-band signaling for data communications over digital wireless telecommunications networks
Synchronizer for use with improved in-band signaling for data communications ...
