A signal processing system which discriminates between voice signals and data signals modulated by a voiceband carrier. The signal processing system includes a voice exchange, a data exchange and a call discriminator. The voice exchange is capable of exchanging voice signals between a switched circuit...http://www.google.es/patents/US6987821?utm_source=gb-gplus-sharePatente US6987821 - Voice and data exchange over a packet based network with scaling error compensation
Voice and data exchange over a packet based network with scaling error ...
