AudioCodes Mediant 800B User Manual page 433

User's Manual
The device removes the G.723 coder from the SDP offer, re-orders the coder list so that
G.711 is listed first, and sends the SIP message containing only the G.711 and G.729
coders in the SDP.
To apply an Allowed Audio Coders Group for restricting coders to a SIP entity:
1. Configure an Allowed Audio Coders Group in the Allowed Audio Coders Groups table
(see description below).
2. In the IP Profile associated with the SIP entity (see 'Configuring IP Profiles' on page
436):
•
Assign the Allowed Audio Coders Group (using the
IpProfile_SBCAllowedAudioCodersGroupName parameter).
•
Enable the use of Allowed Audio Coders Groups (by configuring the
IpProfile_SBCAllowedCodersMode parameter to Restriction or Restriction and
Preference).
The device also re-orders (prioritizes) the coder list in the SDP according to the order of
appearance of the coders listed in the Allowed Audio Coders Group. The first listed coder
has the highest priority and the last coder has the lowest priority. For more information, see
'Prioritizing Coder List in SDP Offer' on page 676.
Note:
•
The Allowed Audio Coders Groups table is applicable only to the SBC application.
•
The Allowed Audio Coders Group for coder restriction takes precedence over the
Coder Group for extension coders. In other words, if an extension coder is not
listed as an allowed coder, the device does not add the extension coder to the
SDP offer.
•
To configure "extension" coders for adding to the SDP offer for audio transcoding,
use the Coder Groups table (see Configuring Coder Groups on page 427).
The following procedure describes how to configure Allowed Audio Coders Groups through
the Web interface. You can also configure it through ini file (AllowedAudioCodersGroups
and AllowedAudioCoders) or CLI (configure voip > coders-and-profiles allowed-audio-
coders-groups; configure voip > coders-and-profiles allowed-audio-coders <group
index/coder index>).

To configure an Allowed Audio Coders Group:
1. Open the Allowed Audio Coders Groups table (Setup menu > Signaling & Media tab
> Coders & Profiles folder > Allowed Audio Coders Groups).
2. Click New; the following dialog box appears:
Figure 20-4: Allowed Audio Coders Groups table - Add Dialog Box
3. Configure a name for the Allowed Audio Coders Group according to the parameters
described in the table below.
Version 7.2 433 Mediant 800B Gateway & E-SBC
20. Coders and Profiles