QNO-1

Brinks Pakistan want to have enhance their security system (BSS) to monitor all their sites from central control room. People who want 24/7 surveillance of their properties and quick security guards at their door in case of a robbery or break-in hire them.

The web portal of BSS will allow the security company to configure the security system when it is installed & afterwards as well, monitors all sensors/cameras connected to the security system, and interacts with the users through the system. During installation, the web portal is used to configure the system and provide the user with a bypass key, for arming and disarming the system. When a sensor event(intrusion) is recognized, the software invokes an audible alarm attached to the system. After a delay time specified by the user during system configuration, the software informs brink control room to send security guards by providing information about location, and the nature of the event.

All user interaction with system happens via BSS web portal hosted at an IP address and sms notifications on mobile phones.

1. Draw a complete Class Diagram
2. Draw complete sequence diagram of Invoke Alarm scenario. (only use class and functions mentioned in class diagram of previous part)
3. Draw complete sequence diagram of Change bypass key scenario. (only use class and functions mentioned in class diagram of previous part)
4. Provide state diagram of property object