DUM Overview

The DialogUsageManager (or dum) is the main interface to the dum library used by the application. Any dum application needs to create a dum object. In typical applications there would be a single dum object for the entire application. This single dum object could manage multiple user agents. By default the construction of the dum object creates a SipStack. dum has the following roles and responsibilities:

• Manages profiles
• Manages AppDialogSetFactory
• Manages and stores Handlers (DialogSetHandler, InviteSessionHandler, ClientRegistrationHandler, ServerRegistrationHandler, ClientSubscriptionHandler, ServerSubscriptionHandler, ClientPublicationHandler, ServerPublicationHandler, OutOfDialogHandler, ClientPagerMessageHandler, ServerPagerMessageHandler, RegistrationPersistenceManager)
• Manages redirections (RedirectManager)
• Manages client authentication (ClientAuthManager)
• Manages server authentication (ServerAuthManager)
• Manages SipStack and optional StackThread
• Interface to add new Transports
• Manages handles to Usages (HandleManager)
• Provides interfaces to create new sessions as a UAC (invite, subscription, publication, registration, pager, others)
• Provides interfaces to find particular usages based on a DialogId