Learn about using Amazon Chime SDK PSTN audio service call legs

The PSTN audio service can operate on one or more call legs. For example, you have a single call leg when you record or deliver a voice mail, and you have multiple call legs when you join an Amazon Chime SDK meeting.

The following diagram shows the flow of a single-leg call.

The following diagram shows the architecture of a multi-leg call.

The following diagram shows the flow of a multi-leg bridged call.