A voice gateway (64) includes an input port (70) that receives a voice signal from an unbundled analog line (62) coupled to a Class 5 switch (52). The voice signal is converted to a digital format by an analog-to-digital and digital-to-analog converting unit (76). The voice signal is placed into a compressed...http://www.google.fr/patents/US7738449?utm_source=gb-gplus-shareBrevet US7738449 - Method and apparatus for providing voice signals to and from a telecommunications switch
Method and apparatus for providing voice signals to and from a ...
