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Grandstream GXW410x series Manual

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Grandstream Networks, Inc. GXW410x User Manual Page 27 of 35
Firmware Version 1.3.4.13 Last Updated: 3/2012
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. Once 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 Time
r
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.
Enable 100rel
The use of the PRACK (Provisional Acknowledgment) method enables reliability to be offered
to SIP provisional responses (1xx series). This is very important if PSTN inter-networking is
to be supported. A user’s request to use reliable provisional responses is invoked by the
100rel tag which is appended to the value of the required header of initial signalling
messages.
Refe
r
-to uses
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.
INVITE Ring-no-
answer Timeout
In case incoming call has arrived from PSTN to VoIP and INVITE message was generated by
GXW device, the call will be disconnected after preconfigured timeout if not answered by
VoIP extension.
Accept INVITE
from Proxy Only
Default is YES. The device will authenticate and accept only incoming INVITE messages
from the peered SIP server.
Preferred Vocode
r
The GXW410x supports up to 5 different Vocoder types including G.711 A-/U-law, GSM,
G.723.1, G.729A/B. The user can configure Vocoders in a preference list that will be
included with the same preference order in SDP message. The first Vocoder in this list can
be entered by choosing the appropriate option in “Choice 1”. Similarly, the last Vocoder in
this list can be entered by choosing the appropriate option in “Choice 8”.
Special Feature
Default is Standard. Choose the selection to meet some special requirements from Soft
Switch vendors like Nortel, Broadsoft, etc.
… 27 …


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