Configuring Various Codec Attributes; Configuring Allowed Audio Coder Groups - AudioCodes Mediant 800B User Manual

19.1.2 Configuring Various Codec Attributes

The following procedure describes how to configure various coder attributes such as
bitrate.

To configure codec attributes:
1. Open the Coder Settings page (Setup menu > Signaling & Media tab > Coders &
Profiles folder > Coder Settings).
2. Configure the following parameters:
•
AMR coder:
♦
•
SILK coder (Skype's default audio codec):
♦
♦
•
Opus coder:
♦
3. Click Apply.
19.2

Configuring Allowed Audio Coder Groups

The Allowed Audio Coders Groups table lets you configure up to 10 Allowed Audio Coders
Groups for SBC calls. For each Allowed Audio Coders Group, you can configure up to 10
audio coders. The coders can include pre-defined coders and user-defined (string) coders
for non-standard or unknown coders.
Allowed Audio Coders Groups restrict coders for SIP entities. Only coders listed in the
Allowed Audio Coders Group (i.e., allowed coders) that is associated with the SIP entity
can be used. If the coders in the SDP offer ('a=rtpmap' field) of the incoming SIP message
are not listed in the Allowed Audio Coders Group, the device rejects the calls, unless
transcoding is configured, whereby "extension" coders are added to the SDP, as described
in Coder Transcoding on page 629. If the SDP offer contains some coders that are listed in
the Allowed Audio Coders Group, the device manipulates the SDP offer by removing the
User's Manual
'AMR Payload Format' (AmrOctetAlignedEnable): Defines the AMR payload
format type:
'Silk Tx Inband FEC': Enables forward error correction (FEC) for the SILK
coder.
'Silk Max Average Bit Rate': Defines the maximum average bit rate for the
SILK coder.
Figure 19-2: Configuring SILK Coder Attributes
'Opus Max Average Bitrate' (OpusMaxAverageBitRate): Defines the
maximum average bit rate (in bps) for the Opus coder.
Figure 19-3: Configuring Opus Coder Attributes
Mediant 800B Gateway & E-SBC
400 Document #: LTRT-10298