User manual

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¾ First Codec：The fist preferential DSP codec: G.711A/u, G722, G.723,
G.726-32, G.729.
¾ Second Codec ： The second preferential DSP codec: G.711A/u, G722,
G.723, G.726-32, G.729.
¾ Third Codec ： The third preferential DSP codec: G.711A/u, G722, G.723,
G.726-32, G.729.
¾ Forth Codec: The Forth preferential DSP codec: G.711A/u, G722, G.723,
G.726-32, G.729.
¾ Fifth Codec: The fifth preferential DSP codec: G.711A/u, G722, G.723,
G.726-32, G.729.
¾ Sixth Codec: The sixth preferential DSP codec: G.711A/u, G722, G.723,
G.726-32, G.729.
¾ Input Volume：Specify Input (MIC) Volume grade.
¾ Output Volume：Specify Output (receiver) Volume grade.
¾ Hands free Volume：Specify Hands free Volume grade.
¾ Ring Volume：Specify Ring Volume grade.
¾ G729 Payload Length：Set G729 Payload Length.
¾ Signal Standard：Select Signal Standard.
¾ G722 Timestamps: 160/20ms or 320/20ms is available.
¾ G723 Bit Rate: 5.3kb/s or 6.3kb/s is available.
¾ Default Ring Type: Select signal standard.
¾ VAD：Select it or not to enable or disable VAD. If enable VAD, G729
Payload length could not be set over 20ms.
¾ Handdown Time: Set the time which the phone hang up automatically
after call ended when use handfree mode.