Grandstream GXV3140 User Manual - Manual (Page 50)

FIRMWARE VERSION 1.0.7.80 GXV3140 USER MANUAL Page 50 of 151
seconds.
UAC Specify Refresher As a Caller, select UAC to use the phone as the refresher, or select UAS to
use the Callee or proxy server as the refresher.
UAS Specify Refresher As a Callee, select UAC to use the caller or proxy server as the refresher,
or select UAS to use the phone as the refresher.
Force INVITE The Session Timer can be refreshed using the INVITE or UPDATE
methods. Select “Yes” to use the INVITE method to refresh the session
timer.
Caller Request Timer The default setting is Yes. If Yes is selected, the phone will use the session
timer when it makes outbound calls if remote party supports session timer.
Callee Request Timer If Yes is selected, the phone will use the session timer when it receives
inbound calls with session timer request.
Force Timer If Yes is selected, the timer will be activated even if the other party does not
support session timers. If No is selected, the timer will be activated only if
the other party supports the timer. To disable the timer, Caller Request
timer, Callee request timer and Force Timer should all be set to No.
Enable 100rel 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. The default setting is No.
Use Privacy Header Selects whether to send Pricy header with INVITE. The default setting is
“Default”.
Use P-Preferred-Identity
Header
Selects whether to send P-Preferred-Identity header with INVITE. The default
setting is “Default”.
SIP Transport Selects the SIP transport method. There are three types: TCP, UDP and
TLS.
Symmetric RTP Selects whether or not symmetric RTP is supported.
Support SIP Instance ID Selects whether or not SIP Instance ID is supported.
Validate Incoming
Messages
This configuration selects whether or not the incoming messages should be
validated.
Check SIP User ID for
Incoming INVITE
Default is No. Check the incoming SIP User ID in Request URI. If they don’t match,
the call will be rejected. If this option is enabled, the device will not be able to make
direct IP calls.
Authenticate Incoming
INVITE
Default is No. When enabled, device will challenge the INVITE for
authentication with SIP 401 Unauthorized response.
Only Accept SIP Requests Default is No. When enabled, device will reject those SIP requests not