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If a handler is passed to call-related actions, that handler is called whenever the state of the call changes.

The handler is called with one argument, a call status object with the following fields:

  • state - SIP state of the call. One of
  • accountSlot - Identifier for the line the call is coming in on.
  • callHandle - Identifier for the call. This will match the call handle returned by, for example.
  • remoteInfo - SIP url for the remote end of the call.
  • remoteContact - SIP contact header for the remote end of the call.
  • lastStatus - Most recent SIP status code associated with the call, or "0".
  • lastStatusText - Most recent text associated with status code.
  • mediaStatus - Describes the current audio data flow. 
    One of "none", "active", "local_hold", "remote_hold", or "error".
  • headers - Object mapping SIP headers to their values.

However, if there's an api-level error (e.g., the callHandle is invalid, you are trying to make a call when there's already an active call, etc.), these are available instead:

  • state - Has the value "ERROR".
  • callHandle - Identifier for the call.
  • errorText - Human readable error message (not for display to end users).