Dialogs

Dialogs represent a peer-to-peer SIP relationship between two user agents that persists for some time. A dialog is established by SIP transactions that create a session, such as an INVITE request that has been successfully acknowledged. Dialogs encompass the entire session from setup to termination, including any mid-session signaling (e.g., re-INVITEs or UPDATE requests) for modifying session parameters or features like call hold, transfer, and media adjustments.