User guide

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2.5 DSP configuration
On this page, user can set speech coding，IO volume control, cue tone standard,
caller ID standard and so on.
1. Configure Coding Rule according to network bandwidth and VoIP server;
support G.711a/u G.729 G723 and Wideband G.722 Codec for better
speech quality.
2. Input Volume is to adjust mike volume. The value is from 1 to 9
3. Output Volume is to adjust handset out volume. The value is from 1 to 9.
4. Configure Signal Standard according to country’s phone voice. It acts on
the tone when you pick up phone, ring back tone and so on.
5. Normally, G729 Payload Length does not need to be changed into 10 ms;
the voice 6，payload size can be represented in terms of the codec
samples. For example, a G.729 voice payload size of 20 ms (two 10 ms
codec samples) represents a voice payload of 20 bytes [ (20 bytes * 8) /
(20 ms) = 8 Kbps ]
6. Adjust the hand down time .The time range is from 80ms to 800ms.
7. VAD Enable/disable VAD (Voice activity detection).