User's Manual

FIRMWARE 1.0.3.4 GXW42XX USER MANUAL PAGE 40 OF 56
Remove OBP from
Route Header
Default is No. If set to Yes, the Outbound Proxy will be removed from the route header.
Support SIP
Instance ID
Default is Yes. If set to Yes, the contact header in REGISTER request will contain SIP Instance
ID as defined in IETF SIP Outbound draft.
Refer-To Use
Target Contact
Default is No. If set to YES, then for Attended Transfer, the “Refer-To” header uses the
transferred target’s Contact header information.
SUBSCRIBE for
MWI
Default is No. When set to “Yes” a SUBSCRIBE for Message Waiting Indication will be sent
periodically.
Enable 100rel
Enables the use of PRACK (Provisional Acknowledgment) method.
TEL URI
The default setting is “Disabled”. If the phone has an assigned PSTN
Number, this field should be set to “User=Phone” then a
“User=Phone” parameter will be attached to the “From header” in the SIP
request to indicate the E.164 number. If server supports TEL URI format, then this option needs
to be selected.
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 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. 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.