T-SBC Requirements

A valid Transcoding Session Border Controller (T-SBC) configuration must include the following:

• A global SIP configuration, with dialog-transparency set to disabled. You must disable Dialog transparency on the T-SBC, so that the INVITE from the T-SBC contains a different call ID and From tag.
• A public realm with codec-manip-in-realm set to enabled because the system uses the same realm for transcoding. You must also enable the mm-in-realm parameter.