Question

6. Draw a statechart describing the operation of a cellular phone. Assume that the phone has keys for:

            – power on and off

            – keypad locking and unlocking

            – 0-9, #, and *

            – talk (or send) and end

            Model the following operations:

            – power on/off

            – keypad locking/unlocking

            – making calls (e.g., dialing, connecting, talking),

            – receiving calls (e.g., ringing, talking)

Answer 1