ee % ~ worthwhile to place these precautions heres ae Marking classified tapes with colored pencil. b. Isolating unapproved circuits, c. Placing warning signs on unapproved circuits, d, Ensuring cach taupe received had classification recorded, “Ge f. Conducting nuncrous socuri ty classes and conferences. Designing and constructing & device to shut off machina automatically when a classified tape is inserted in an unapproved circuit. | During CASTLE, the dial axchange hendlcd an average of 8000 salls per day; the old Ranual exchange had handled & maximus of about 2600 calls por dey. The FRED Comeenter everaged about 10,000 mcessarcs per week during March and 700 during April, ar Comeentcr handled about 3500 ossages perwot 1 wes hear ¢ feet oie the LER . ,