For U.S.A.

The following information has been compiled according to Code of Federal Regulations “Title 49, Part 575”.

    See also:

    Parking on a grade
    Always block the wheels under both vehicle and trailer when parking. Apply the parking brake firmly. You should not park on a hill or slope. But if parking on a hill or slope cannot be avoided ...

    Airflow selection
    ...

    Taking a phone call and declining an incoming call
    To take a phone call: Press the OFF hook switch . To put an incoming call on hold: Press the ON hook switch briefly. To decline an incoming call: Press the ON hook switch for more than 1.5 seconds ...