Audio Compression
G.711alaw/G.711ulaw/G.722.1/G.726/MP2L2/PCM
Audio Bit rate
G.722.1: 16Kbps,G.711ulaw: 64Kbps, G.711alaw: 64Kbps,MP2L2: 32 kbps, 40 kbps, 48 kbps, 56 kbps, 64 kbps, 80 kbps, 96 kbps, 112 kbps, 128 kbps, 144 kbps, 160 kbps, 192 kbps;
Audio Sampling Rate
MP2L2: 16kHz, 32kHz, 48kHz,PCM: 8kHz, 16kHz,32kHz, 48kHz