AUDIO ConfigurationField name explanationFirst Codec The first preferential DSP codec: G.711A/u, G.722,G.723, G.729.Second Codec The second preferential DSP codec: G.711A/u, G.722,G.723, G.729.Third Codec The third preferential DSP codec: G.711A/u, G.722,G.723, G.729.Fourth Codec The forth preferential DSP codec: G.711A/u, G.722,G.723, G.729.Fifth Codec The fifth preferential DSP codec: G.711A/u, G.722,G.723, G.729.Sixth codec The sixth preferential DSP codec: G.711A/u, G.722,G.723, G.729.Handset InputVolumeSpecify Input (MIC) Volume grade.Hands-free Volume Specify Hands-free Volume grade.G729AB PayloadLengthSet G729 Payload Length.Onhook Time Specify the least reflection time of Hand down, thedefault is 200ms.Default Ring Type Select Ring Type.Handset OutputVolumeSpecify Output (receiver) Volume grade.SpeakerphonevolumeSpecify Speakerphone Volume grade.Ring Volume Specify Ring Volume grade.G722 Timestamps 160/20ms or 320/20ms is available.G723.1 Bit Rate 5.3 kb/s or 6.3kb/s is available.Default Ring Type Set up the ring by default.Tone Standard Select Tone Standard.Enable VAD Select it or not to enable or disable VAD. If enableVAD, G729 Payload length could not be set over20ms.DTMF PayloadType Set DTMF Payload Type.8.3.4.2 FEATUREIn this web page, you can configure Hotline, Call Transfer, Call Waiting, 3Ways Call, Black List, white list Limit List and so on.