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GXV3240 User Manual
GXV3240 WEB GUI
Grandstream Co., Ltd
Software Version：1.0.0.11 Document Version：0.1
147
As a Callee, select UAC（User Agent Client） to use caller or proxy server as the
refresher; or select UAS （User Agent Server）to use the phone as the refresher.
The Session Timer can be refreshed using the INVITE method or the UPDATE
method. Select "Yes" to use the INVITE method to refresh the session timer.
If set to "Yes" and the remote party supports session timers, the phone will use a
session timer when it makes outbound calls.
If set to "Yes" and the remote party supports session timers, the phone will use a
session timer when it receives inbound calls.
If Force Timer is set to "Yes", the phone will use the session timer even if the remote
party does not support this feature. If Force Timer is set to "No", the phone will enable
the session timer only when the remote party supports this feature.
To turn off the session timer, set caller Request Timer, callee Request Timer and
Force Timer all to "No".
The use of the PRACK (Provisional Acknowledgment) method enables reliability to
SIP provisional responses (1xx series). This is very important in order to support
PSTN internetworking. To invoke a reliable provisional response, the 100rel tag is
appended to the value of the required header of the initial signaling messages.
Defines whether or not the Privacy header will be in the SIP INVITE message. The
default setting is “default”.
Defines whether or not the P-Preferred-Identity header will be in the SIP INVITE
message. The default setting is “default”.
Determines the network protocol used for the SIP transport. Users can choose from
UDP / TCP /TLS. The default setting is “UDP”.
Defines whether symmetric RTP is supported or not.
x-PDFDivision