Is there some kind of ID that can identify a call in the application?

Depending on the call type, the following types of callback are called to your server with the call identifier.

• 1-to-1 call
  • Notify callback is called when connecting a call.
  • 1-to-1 Call Event callback is called whenever a call ends.
• Group call
  • Group Call Event callback is called whenever a participant joins or leaves.

These callbacks include a field called sid, which uniquely identifies a call.