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Use the Codecs Allowed For Transcoding window to specify, for a Packet Service profile (PSP), between which codecs you want the SBC to allow transcoding. Checking options on this window specifies that the codecs selected in the "This Leg" row can be transcoded to those selected in the "Other Leg" row, and vice versa.

PSPs are assigned to both legs of a call. Therefore the Codecs Allowed For Transcoding values applied to a particular call reflect the contributions of both profiles, with the ingress and egress call legs being viewed as "This Leg" by one profile and as the "Other Leg" by the other profile.

Note that if you select Determined By PSP as the Transcode option for a PSP (within Packet To Packet Control), the options on this window are not available and cannot be configured for the leg to which the PSP applies. In that case, the codec options you select in the profile for the other call leg will apply.

To View and Edit Codecs Allowed For Transcoding

On the SBC main screen, go to Configuration > Profile Management > Category: Media Profiles > Packet Service Profile > Packet To Packet Control > Codecs Allowed For Transcoding or
All > Profiles > Media > Packet Service Profile > Packet To Packet Control > Codecs Allowed For Transcoding

The Codecs Allowed For Transcoding window opens.

To configure Codecs Allowed For Transcoding:

  1. Select the Packet Service Profile for which you want to configure Codecs Allowed For Transcoding parameters. The Codecs Allowed For Transcoding options appear.

    Codecs Allowed For Transcoding Window

  2. Click to select the codec options you want to enable in the profile for This Leg and the Other Leg. This list of codecs is the same for each leg: g711a, g711u, g7231, g726, g729, t38, ilbc, amr, efr, evrc, g722, g7222, silk, g7221, and opus.
  3. Click Save.