Did anyone try to use the GNU Radio framework for VoIP processing? e.g. - receiving an RTP stream via Ethernet port as an input - sending an RTP stream via Ethernet port as the output - RTCP support - implementing voice codecs (G.711 A/u...) - voice activity detection (silence removal and comfort noise generation) - RFC2833 implementation - sRTP support - 3-party conferencing - voice/music file playout as an RTP stream - telephony tone generation & DTMF detection - ...
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