Grandstream GXW42xx User Manual - Manual (Page 47)

FIRMWARE 1.0.5.8 GXW42XX USER MANUAL PAGE 45 OF 62
SIP REGISTER
Contact Header
Uses
Default is LAN Address. If set to WAN Address, device will detect its WAN address and use it
in SIP REGISTER Contact Header.
SIP Settings - Session Timer
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 selectin g “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. 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.
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.
SIP Settings - Security Settings
Validate Incoming
Messages
Defines whether the incoming messages will be validated.