A conference call between two user agents, 1 and 2, belonging to two different ISPs each using
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A conference call between two user agents, 1 and 2, belonging to two different ISPs each using SIP must be established. After a while, user agent 3, belonging to a third ISP using SIP, is invited by user agent 2 and successfully joins the media exchange session. Ignoring the registration process, give a timing diagram for the exchange of messages until user agent 1 completes the call termination.
Related Book For
International Marketing And Export Management
ISBN: 9781292016924
8th Edition
Authors: Gerald Albaum , Alexander Josiassen , Edwin Duerr
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