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FIRMWARE 1.0.0.49 GXW42XX USER MANUAL PAGE 45 OF 54
Session
Expiration
Grandstream implemented SIP Session Timer. The session timer extension enables SIP
sessions to be periodically “refreshed” via a SIP request (UPDATE, or re-INVITE. When
the
session interval expires, if there is no refresh via a UPDATE or re-
INVITE message, the
session will be terminated.
Session Expiration is the time (in seconds) at which the session is considered timed out, if no
successful session refresh transaction occurs beforehand. The default value is 180 seconds.
Min-SE
The minimum session expiration (in seconds). The default value is 90 seconds.
Caller Request
Timer
If selecting “Yes” the phone will use session timer when it makes outbound calls if remote
party supports session timer.
Callee Request
Timer
If selecting “Yes” the phone will use session timer when it receives inbound calls with session
timer request.
Force Timer
If selecting “Yes” the phone will use session timer even if the remote party does not support
this feature. Se
lecting “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.
UAC Specify
Refresher
As a Caller, select UAC to use the phone as the refresher, or UAS to use the Callee or proxy
server as the refresher.
UAS Specify
Refresher
As a Callee, select UAC to use caller or proxy server as the refresher, or UAS to use the
phone as the refresher.
Force INVITE
Session Timer can be refreshed using INVITE method or UPDATE method. Select “Yes” to
use INVITE method to refresh the session timer.
Send Re-INVITE
After Fax
Default is No, If set to “Yes”, device will send an INVITE with audio vocoders upon
completition of Fax to continue session in audio only.
Enable Silence
Detection for Fax
Disconnect
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. The silence
period is non-configurable and fixed to 7 seconds.
Enable 100rel
Enables the use of PRACK (Provisional Acknowledgment) method.
Use First
Matching Vocoder
in 200OK SDP
Default is No. If set to “Yes”, device will include only the first match vocoder in its 200OK
response, otherwise it will include all match vocoders in same order received in INVITE.
45


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