User's Manual

HandyTone 286 User Manual Grandstream Networks, Inc.
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Preferred
Vocoder
The BudgeTone IP phone supports up to 7 different vocoder types
including G711-ulaw (PCMU), G711-alaw (PCMA), G723,
G729A/B, G726-32 (ADPCM), G728, and iLBC. Depending on the
product model, some of these vocoders may not be provided in
standard release.
A user can configure vocoders in a preference list that will be
included with the same preference order in SDP message. The first
vocoder in this list can be entered by choosing the appropriate option
in “Choice 1”. Similarly, the last vocoder in this list can be entered
by choosing the appropriate option in “Choice 7”.
G723 Rate:
This defines the encoding rate for G723 vocoder. By default, 6.3kbps
rate is chosen.
iLBC frame
size
This defines the size of the iLBC codec frame. The default setting is
20ms.
iLBC payload
type
This defines the iLBC payload type. The default setting is 96.
Silence
Suppression
This controls the silence suppression/VAD feature of G723 and
G729. If set to “Yes”, when a silence is detected, small quantity of
VAD packets (instead of audio packets) will be sent during the
period of no talking. If set to “No”, this feature is disabled.