Patent ID: 7522586

Claim:
A system configured to tunnel a compressed wideband audio data stream through a data link intended for a narrowband audio data stream, comprising: a first apparatus, comprising a first transcoder configured to transcode a first compressed wideband audio signal into a narrowband audio data stream, and a first transcoder bypass configured to convert, without transcoding, the compressed wideband audio signal into a 64 kbps compressed wideband audio data stream for transmission over the data link, wherein the data link is configured to transmit the narrowband audio data stream at a data rate less than or equal to 64 kbps; and a second apparatus, comprising a second transcoder configured to transcode the narrowband audio data stream into a second compressed wideband audio signal, and a second transcoder bypass configured to convert, without transcoding, the 64 kbps compressed wideband audio data stream into the second compressed wideband audio signal wherein a sampling frequency greater than 8 kHz is used to produce a sampled wideband audio signal, which is subsequently encoded to produce the compressed wideband audio signal.