List of all on-going SIP-sessions.

Parties - The SIP addresses of the two users participating in the SIP session.
Call-ID - Unique ID of the SIP session.

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List of all SIP users currently registered.

SIP address - SIP address used by the user for the registration.
Registration(s) - SIP address(es) with information of where the user is located.

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SIP (Session Initiation Protocol)