Grandstream Networks HT502 User Manual page 59

Send Re-INVITE After Default is No, If set to "Yes", device will send an INVITE with audio vocoders
Fax upon completion of Fax to continue session in audio only.
Enable Silence For fax machines that do not send a Disconnect when fax is done. This option
Enables/Disables the detection of silence in order to know the fax has finished.
Detection for Fax
Disconnect The silence period is non-configurable and fixed to 7 seconds.
Enables the use of PRACK (Provisional Acknowledgment) method.
Enable 100rel
Add Auth Header On If set to Yes, device will include authorization header in the Register request.
Initial REGISTER
Use First Matching Default is No. If set to "Yes", device will include only the first match vocoder in
Vocoder in 200OK its 200OK response, otherwise it will include all match vocoders in same order
SDP received in INVITE.
Preferred Vocoder The HT502 supports up to 5 different Vocoder types including G.711 A-/U-law,
G.726 (Supports bit rates 16, 24, 32 and 40), G.723.1, G.729A/B/E, iLBC and
AAL2.
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".
Vocoder types can also be changed per call basis by using a star code. Please
see the "Call features" section.
Voice Frames per TX Default is 2, from 1 -4 for G711/G726/G729
G723 Rate Default is 6.3kbps. Defines the encoding rate for G.723 vocoder.
iLBC Frame Size Sets the iLBC frame size in 20ms or 30ms
Defines payload type for iLBC. Default value is 97. The valid range is between
iLBC Payload type
96 and 127.
Default value is 100. Range is from 96 to 127.
AAL2-G726-16
Payload type
The user can configure Vocoders in a preference list that will be
HT502 User Manual
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