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US20110007890 METHOD AND APPARATUS FOR RINGING  
A method and apparatus is provided for ring-trip detection in a line card having an analog-to-digital converter for processing voice signals. The method includes receiving a ringing control...
US20100248687 METHODS AND SYSTEMS FOR ENCODING AND DECODING AUDIO SIGNALS  
Methods and systems for encoding and decoding audio signals are described. In one embodiment, a first DTMF tone in an audio signal may be identified and decoded. A second DTMF tone in the audio...
US20080043990 METHOD AND SYSTEM FOR ARCHIVING DATA IN REAL-TIME COMMUNICATIONS  
Consistent with an embodiment of the invention, a communication device enables real-time communications by generating a representation of an analog input signal that is suitable for communication...
Matches 1 - 3 out of 3