Codec Settings - Grandstream Networks GSC3505 Series User Manual

Configures the session timer feature on the device by force.
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 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".
Sets the SIP message type for refresh the session. If it is set to "Yes", the Session Timer will be refreshed by
Force INVITE using the SIP INVITE message. Otherwise, the device will use the SIP UPDATE or SIP OPTIONS message.
Default is "No".

Codec Settings

Preferred
Vocoder
Lists the available and enabled Audio codecs for this account. Users can enable the specific audio codecs by
Preferred
moving them to the selected box and set them with a priority order from top to bottom. This configuration
Vocoder
will be included with the same preference order in the SIP SDP message.
Codec Configures the device to use which codec sequence to negotiate as the callee. When set to "Caller", the
Negotiation device negotiates by SDP codec sequence from received SIP Invite; When set to "Callee", the device
Priority negotiates by audio codec sequence on the device. The default setting is "Callee".
Use First
Matching
Configures the device to use the first matching codec in the 200OK message. The default value is 0.
Vocoder in
200OK SDP
iLBC Frame Sets the iLBC (Internet Low Bitrate Codec) frame size if ILBC is used. Users can select it from 20ms or 30ms.
Size The default setting is 30ms.
G726-32
Configures G726-32 payload type for ITU packing mode. Payload 2 is static and payload dynamic is
ITU Payload
dynamic. The default setting is "2".
Type
G726-32
Dynamic
Specifies the G726-32 payload type, and the valid range is 96 to 127. The default setting is "126".
Payload
Type
Opus
Payload Defines the desired value (96-127) for the payload type of the Opus codec. The default value is 123.
Type