Grandstream Networks GXV34 0 Series Manual page 37

Sets which party will refresh the active session if the phone makes outbound calls. If it is set to "UAC" and
the remote party does not support Refresher feature, the phone system will refresh the active session.
UAC Specify
Refresher
If it is set to "UAS", the remote party 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".
Specifies which party will refresh the active session if the phone receives inbound calls. If it is set to "UAC",
the remote party will refresh the active session. If it is set to "UAS" and the remote party does not support
UAS Specify
refresh feature, the phone system will refresh it.
Refresher
The default setting is "UAC".
Sets the caller party to act as refresher by force. If set to "Yes" and both party support session timers, the
Caller
phone will enable the session timer feature when it makes outbound calls. The SIP INVITE will include the
Request content "refresher=uac".
Timer
The default setting is "No".
Sets the callee party to act as refresher by force. If set to "Yes" and the both parties support session timers,
Callee
the phone will enable the session timer feature when it receives inbound calls. The SIP 200 OK will include
Request
the content "refresher=uas".
Timer
The default setting is "No".
Configures the session timer feature on the phone system by force.
If it is set to "Yes", the phone will use the session timer even if the remote party does not support this
feature.
Force Timer
If set to "No", the phone 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".
Sets the SIP message type for refresh the session. If it is set to "Yes", the Session Timer will be refreshed by
Force
using the SIP INVITE message. Otherwise, the phone system will use the SIP UPDATE or SIP OPTIONS
INVITE
message. Default is "No".
Account/SIP/Codec Settings
Preferred Vocoder
Codec Negotiation
Priority
Use First Matching
Vocoder in 200OK
SDP
ILBC Frame Size
Table 21: Account/SIP/SIP Settings
Preferred Vocoder
Lists the available and enabled Audio codecs for this account. Users can enable the specific audio
codecs by moving them to the selected box and set them with a priority order from top to bottom.
This configuration will be included with the same preference order in the SIP SDP message.
Configures the phone to use which codec sequence to negotiate as the callee. When set to "Caller",
the phone negotiates by SDP codec sequence from received SIP Invite; When set to "Callee", the
phone negotiates by audio codec sequence on the phone. The default setting is "Callee".
Configures the phone to use the first matching codec in the 200OK message.
The default value is 0.
Sets the ILBC (Internet Low Bitrate Codec) frame size if ILBC is used. Users can select it from 20ms or
30ms.
The default setting is 30ms.