Firmware Version 1.0.9.1 - Grandstream Networks GXW-4004 User Manual

Default is No, If set to "Yes", device will send an INVITE with audio vocoders upon
Send Re-INVITE After
Fax completition 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
Detection for Fax Enables/Disables the detection of silence in order to know the fax has finished. The
Disconnect silence period is non-configurable and fixed to 7 seconds.
Enable 100rel
Enables the use of PRACK (Provisional Acknowledgment) method.
Default is No. If set to "Yes", device will include only the first match vocoder in its 200OK
Use First Matching
Vocoder in 200OK
response, otherwise it will include all match vocoders in same order received in INVITE.
SDP
Preferred Vocoder
The GXW40XX 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 and iLBC. The user can
configure Vocoders in a preference list that will be 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".
Voice Frames per TX
Default is 2, from 1 -4 for G711/G726/G729
G723 Rate Defines the encoding rate for G.723 vocoder. By default, 6.3kbps rate is chosen.
iLBC Frame Size Sets the iLBC frame size in 20ms or 30ms
iLBC Payload type Default value is 97. Defines payload type for iLBC. The valid range is between 96 and
127.
AAL2-G726-16 Default value is 100. Range is from 96 to 127.
Payload type
AAL2-G726-24 Default value is 99. Range is from 96 to 127.
Payload type
AAL2-G726-32 Default value is 104. Range is from 96 to 127.
Payload type
AAL2-G726-40 Default value is 103. Range is from 96 to 127.
Payload type
G729E payload type Default value is 102. Range is from 96 to 127.
VAD Default is No. VAD allows detecting the absence of audio and conserve bandwidth by
preventing the transmission of "silent packets" over the network.

FIRMWARE VERSION 1.0.9.1

GXW40XX USER MANUAL Page 52 of 60