Interfaces w peripheral equip i.E. Key generators, freq/time standard and teletype; cont key gen and data flow; contains fault isulation; contains comsec alarms; operating power req: 115v AC at 400hz single phase; dim. Data and weight, 21.18 in. Lg by 5.00 in. W by 7.88 in h; shelf mtd; held in place by 2 rear guide pin holes and 2 front hooks; material: aluminum; special features: forced cooling air