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Use this object to define the packet-to-packet control parameters.

To View and Edit Packet To Packet Control

On SBC main screen, go to Configuration > Profile Management > Category: Media Profiles > Packet Service Profile > Packet To Packet Control.

Select the desired Packet Service Profile from the drop-down list to view its respective Packet To Packet Control parameters.

The Packet To Packet Control window is displayed.

Profile Management - Media Profiles - Packet Service Profile - Packet To Packet Control

The following fields are displayed:

Packet Service Profile - Packet to Packet Control

Parameter Description
Transcode

This control specifies the transcoding method used for the associated packet flow.

The 

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performs transcoding for media streams carried between two IP devices by translating the streams from the ingress audio encoding format to the egress audio encoding format when the devices do not share a common codec. In some environments, transcoding may be preferred over negotiating the attributes of a common codec.

• only—The

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performs transcoding for the codecs selected in the Codec Allowed For Transcoding section (see definition below). None of the conditions specified in the Conditions In Addition To "No Common Codec" section are used in determining when to perform transcoding.

• conditional—The

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 performs transcoding when any of the conditions specified in the Conditions In Addition To "No Common Codec" section are met.

• determinedByPSPForOtherLeg—The

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performs transcoding based on the transcoding options specified in the packet service profile assigned to the other leg of the call. When selected, PSX Manager disables the check boxes in the Codecs Allowed for Transcoding section.

• transcoderFreeTransparency—When selected, the

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transparently passes the PSP from the ingress call-leg to the egress call-leg, bypassing transcoding.

NOTE: The SBC, when configured with the appropriate codecs, transcodes for differences in the codecs. Use ‘transcode conditional’ option to allow the SBC to transcode for certain conditions in addition to differences in codecs. For example, if the codecs are the same on both legs and this option is selected, by applying additional settings for the particular call scenarios, the SBC will trigger transcoding for those scenarios, such as:

  1. Transcode for DTMF differences. For example, when both legs have same codec, but one uses inband for DTMF and the other RFC 2833.
  2. Transcode for Silence Suppression differences.
  3. Transcode for Packet Size differences.
  4. Transcode for RFC2833/4733 Payload differences. For example, when codecs are the same on both legs, but one side uses 101 as the Payload Type for DTMF and the other uses 102.
  5. Transcode always.

Make the required changes and click Save at the right hand bottom of the panel to save the changes made.

 

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