Account - Codec Settings; Table 26: Account - Codec & Rtp Settings - Grandstream Networks GAC2500 Administration Manual

Account - Codec Settings

Preferred Vocoder
Hide Vocoder
Codec Negotiation Priority
Use First Matching Vocoder
in 200OK SDP
Enable Audio RED with FEC
iLBC Frame Size
2 ITU Payload
G726-32 Dynamic PT
Opus Payload Type
G.722.1 Rate
G.722.1 Payload Type
DTMF
DTMF Payload Type
Table 26: Account - Codec & RTP Settings
Lists the available and enabled Video codecs for this account. Users can
enable the specific video 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.
Hide vocoder information on call screen.
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.
Enables FEC for audio calls, default setting is "No".
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 payload type for ITU packing mode. Payload 2 is static and
payload dynamic is dynamic.
Specifies the G726-32 payload type, and the valid range is 96 to 127.
The default setting is "126".
Defines the desired value (96-127) for the payload type of the Opus
codec. The default value is 123.
Supports 24kbps or 32kbps, please confirm it with your service provider.
The default setting is 24kbps.
Defines the payload, the current range is 100-126. Default setting is 104.
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;
• SIP INFO, which uses SIP INFO to carry DTMF. The defect of this mode
is that it's easily to cause desynchronized of DTMF and media packet if
the SIP and RTP messages are required to transmitted respectively.
The default setting is "RFC2833".
Configures the RTP payload type that indicates the transmitted packet
contains DTMF digits. The valid range is from 96 to 127. The default
value is 101.
GAC2500 Administration Guide
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