Grandstream gxw-4004 Manuel D’Utilisation

 

Grandstream Networks, Inc. 

Page 31 of 36  

 

 

If selecting “Yes” the phone will use session timer when it makes outbound calls if remote 
party supports session timer. 

If selecting “Yes” the phone will use session timer when it receives inbound calls with session 
timer request.  

If selecting “Yes” the phone will use session timer even if the remote party does not support 
this feature. Selecting “No” will allow the phone to enable session timer only when the remote 
party support this feature.  
 
To turn off Session Timer, select “No” for Caller Request Timer, Callee Request Timer, and 
Force Timer. 

As a Caller, select UAC to use the phone as the refresher, or UAS to use the Callee or proxy 
server as the refresher.  

As a Callee, select UAC to use caller or proxy server as the refresher, or UAS to use the 
phone as the refresher. 

Session Timer can be refreshed using INVITE method or UPDATE method. Select “Yes” to 
use INVITE method to refresh the session timer.  

The GXW400x 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”. 

Defines the encoding rate for G.723 vocoder. By default, 6.3kbps rate is chosen. 

Sets the iLBC frame size in 20ms or 30ms 

Default value is 97. Defines payload type for iLBC. The valid range is between 96 and 127. 

Default value is 100. Range is from 96 to 127.  

Default value is 99. Range is from 96 to 127. 

Default value is 104. Range is from 96 to 127. 

Default value is 103. Range is from 96 to 127. 

Default value is 102. Range is from 96 to 127. 

Default is No.  VAD allows detecting the absence of audio and conserve bandwidth by 
preventing the transmission of "silent packets" over the network. 

Default is No. When set to Yes the device will change the destination to send RTP packets to 
the source IP address and port of the inbound RTP packet last received by the device. 

T.38 (Auto Detect) FoIP by default, or Pass-Through (must use codec PCMU/PCMA) 

Default is Callee.

 

This decides whether Caller or Callee sends out the re-INVITE for T.38 or 

Fax Pass Through. 

Select either Fixed or Adaptive based on network conditions.