Optionalcontent-The wire content-type (e.g. 'audio/l16;rate=8000').
OptionalheadersOptional headers Vonage forwards on the websocket handshake (call metadata).
Endpoint type — 'websocket' for the bidirectional media leg.
OptionaluriThe wss://… media URL Vonage opens the bidirectional audio leg to.
One NCCO
connect-action endpoint. For media bridging this is awebsocketendpoint.