ATCOM 5520 User Manual page 51

First Codec：The fist preferential DSP codec: G.711A/u, G722, G.723,
G.726-32, G.729.
Second Codec ： The second preferential DSP codec: G.711A/u, G722,
G.723, G.726-32, G.729.
Third Codec ： The third preferential DSP codec: G.711A/u, G722, G.723,
G.726-32, G.729.
Forth Codec: The Forth preferential DSP codec: G.711A/u, G722, G.723,
G.726-32, G.729.
Fifth Codec: The fifth preferential DSP codec: G.711A/u, G722, G.723,
G.726-32, G.729.
Sixth Codec: The sixth preferential DSP codec: G.711A/u, G722, G.723,
G.726-32, G.729.
Input Volume：Specify Input (MIC) Volume grade.
Output Volume：Specify Output (receiver) Volume grade.
Hands free Volume：Specify Hands free Volume grade.
Ring Volume：Specify Ring Volume grade.
G729 Payload Length：Set G729 Payload Length.
Signal Standard：Select Signal Standard.
G722 Timestamps: 160/20ms or 320/20ms is available.
G723 Bit Rate: 5.3kb/s or 6.3kb/s is available.
Default Ring Type: Select signal standard.
VAD：Select it or not to enable or disable VAD. If enable VAD, G729
Payload length could not be set over 20ms.
Handdown Time: Set the time which the phone hang up automatically
after call ended when use handfree mode.
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