Voice over IP support

• G.711 voice codec (64 kbps, µ-law, A-law)
• G.726 voice codec (32 kbps)
• GSM voice codec (13 kbps)
• G.168 echo cancellation, up to 128 ms tail length
• Adaptive jitter buffer
• Voice activity detection (VAD)
• Comfort noise generation (CNG)
• Real Time Protocol (RTP framing)