Use the Terminate method to cancel connecting or Alerted sessions. In Session Initiation Protocol (SIP) messaging there is a distinction between an established or connected session; and a session that is connecting or alerted, in other words one that is not accepted yet by the remote endpoint.

Unified Communications Managed API version 1.0 exposes one method, the Terminate method, to terminate both types of sessions - established and not established. See the example in Terminating an Established Session.

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