Grandstream Networks HT503 User Manual page 62

Voice Frames per TX
G723 Rate
iLBC Frame Size
iLBC Payload Type
AAL2-G726-16
Payload Type
AAL2-G726-24
included with the same preference order in SDP message. The first
Vocoder is entered by choosing the appropriate option in "Choice 1". The
last Vocoder is entered by choosing the appropriate option in "Choice 8".
This field contains the number of voice frames to be transmitted in a single
packet. When setting this value, the user should be aware of the requested
packet time (used in SDP message) as a result of configuring this
parameter. This parameter is associated with the first vocoder in the above
vocoder Preference List or the actual used payload type negotiated between
the 2 conversation parties at run time.
Default is 2, from 1 to 4 for G711/G726/G729 only
For example: if this field is set to be 2 and if the first vocoder chosen is
G729 or G711 or G726, then the "ptime" value in the SDP message of an
INVITE request will be 20ms (2 x10ms)
If the configured voice frames per TX exceeds the maximum allowed value,
the ATA will not accept it and will use and save the precedent configured
allowed value for the corresponding first vocoder choice.
This defines the encoding rate for G723 vocoder. Default setting is 6.3kbps.
This sets the iLBC size in 20ms or 30ms
This defines payload type for iLBC. Default value is 97. The valid range is
between 96 and 127.
Defines payload type for AAL2-G726-16. Default value is 100. Range is
from 96 to 127.
Defines payload type for AAL2-G726-24. Default value is 99. Range is
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