Grandstream Networks GVC3200 Administration Manual page 40

Enable Session It is used to set if the device will use the session timer. If it is set to "Yes", it will be
Timer added in the SIP INVITE message to notify the server. The default setting is "Yes".
It is used to configure the device's SIP session timer. It enables SIP sessions to be
periodically "refreshed" via a SIP request (UPDATE, or re-INVITE). If there is no
Session refresh via an UPDATE or re-INVITE message, the session will be terminated once
Expiration (s) the session interval expires. Session Expiration is the time (in seconds) where the
session is considered timed out, provided no successful session refresh transaction
occurs beforehand. The default setting is 180 with a valid range from 90 to 64800.
It is used to configure the minimum session expiration timer (in seconds) if the device
Min-SE (s)
acts as a timer refresher. The default setting is 90. The valid range is from 90 to 64800.
It is used to set the party which will refresh the active session if the device makes
outbound calls. If it is set to "UAC" and the remote party does not support Refresher
UAC Specify
feature, the device will refresh the active session. If it is set to "UAS", the remote party
Refresher
will refresh it. If it is set to "Omit", the header will be omitted so that it can be selected
by the negotiation mechanism. The default setting is "Omit".
It is used to set the party which will refresh the active session if the device receives
UAS Specify inbound calls. If it is set to "UAC", the remote party will refresh the active session. If it
Refresher is set to "UAS" and the remote party does not support refresh feature, the device will
refresh it. The default setting is "UAC".
It is used to set the SIP message type to refresh the session. If it is set to "Yes", the
Force INVITE
Session Timer will be refreshed by using the SIP INVITE message. Otherwise, the
device will use the SIP UPDATE or SIP OPTION message. The default setting is "No".
This is used to set the caller party to act as refresher. If set to "Yes" and both parties
Caller Request
support session timers, the device will enable the session timer feature when it makes
Timer outbound calls. The SIP INVITE will include the content "refresher=uac". The default
setting is "No".
This is used to set the callee party to act as refresher. If set to "Yes" and both parties
Callee Request
support session timers, the device will enable the session timer feature when it
Timer receives inbound calls. The SIP 200 OK will include the content "refresher=uas". The
default setting is "No".
It is used to activate the session timer feature on the device. If it is set to "Yes", the
device will use the session timer even if the remote party does not support this feature.
Force Timer If it is set to "No", the device will enable the session timer only when the remote party
supports this feature. To turn off the session timer, select "No". The default setting is
"No".
It is used to activate the PRACK (Provisional Acknowledgment) method. This option
is very important to support PSTN internetworking. PRACK improves the network
Enable 100rel
reliability by adding an acknowledgement system to the provisional Responses (1xx).
If set to "Yes", the device will respond to the 1xx response from the remote party. The
default setting is "No".
GVC3200/3202 Administration Guide
Version 1.0.3.64
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