GAC2570 User Manual
Version 1.0.1.23
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Codec Settings
Preferred Vocoder
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.
Codec Negotiation
Priority
Configures the device to use which codec sequence to negotiate as the
callee. When set to
“Caller”, the device negotiates by SDP codec sequence
from received SIP Invite; When set to “Callee”, the device negotiates by
audio codec sequence on the device. The default setting is “Callee”.
Use First Matching
Vocoder in 200OK SDP
Configures the device to use the first matching codec in the 200OK
message. The default setting is not checked.
iLBC Frame Size
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.
G726-32 ITU Payload
Type
Configures G726-32 payload type for ITU packing mode. Payload 2 is static
and payload dynamic is dynamic. The default setting is “2”.
G726-32 Dynamic
Payload Type
Specifies the G726-32 payload type, and the valid range is 96 to 127. The
default setting is “126”.
Opus Payload Type
Defines the desired value (96-127) for the payload type of the Opus codec.
The default value is 123.
DTMF
Specifies the mechanism to transmit DTMF (Dual Tone Multi-Frequency)
signals.
There are 3 supported modes: in audio, RFC2833, or SIP INFO.
•
In audio
, which means DTMF is combined in the audio signal (not very
reliable with low-bit-rate codecs);
•
RFC2833
, which means to specify DTMF with RTP packet. Users could
know the packet is DTMF in the RTP header as well as the type of DTMF.
"No".
The default setting is "No".
Force INVITE
Sets the SIP message type for refresh the session. If it is set to “Yes”, the
Session Timer will be refreshed by using the SIP INVITE message.
Otherwise, the device will use the SIP UPDATE or SIP OPTIONS
message. Default is "No".