User's Manual

Grandstream Networks, Inc. GXV3175 USER MANUAL Page 49 of 60
FIRMWARE VERSION 1.0.1.1 Updated : 3/2012
Wait Time Retry
Registration (s)
The wait time for registration retry if registration fails. The default is set to 20
Seconds.
Local SIP Port The local SIP port for sending and receiving data. The default settings for
Account 1/2/3 are 5060/5062/5064.
Subscribe for MWI Default is set to No. When selected, a SUBSCRIBE for Message Waiting
Indication will be sent out periodically.
Session Expiration (s) 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 (s) The minimum session expiration (in seconds). The default value is 90
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.
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.