Tag: options

  • SIP Messages

    SIP protocol defines several messages: INVITE: inviting user to call BYE: terminating connection between two end points ACK: reliable exchange of invitation messages OPTIONS: get information about capabilities of call REGISTER: passes user location information to SIP registration server CANCEL: terminates search for user

  • A Business example approach

    Hard Systems Model of Change (HSMC) – based on methods from systems engineering (SE), operational research (OR) and project management (PM). With HSMC, easier to determine objectives, find options for action and test them against criteria. HSMC has three phases: 1) Description Description of current system. Explain why change is required. Described in words, diagrams…