4. Use Case Example 3

• Domain: telecommunication. Object: a switch device. Concepts supported: Message, Connection, Port, Dialog, Route, Protocol.

      SEND PACKET REQUEST ( some I/O device protocol )
  

1. The system detects the change of bit 6 from 0 to 1 at the memory location 0xA556BFFF.

2. The system places the address of the packet buffer in the memory location 0x000099BC.

3. The system places the count of packets in the buffer in memory location 0x000099BB.

4. The system sets bit 4 of the memory location 0x000099BA to 1.