This above-baseline standard applies to central offices and similar-type facilities in public telecommunications networks in which a special measure of resistance to damage from high-altitude electromagnetic pulse (HEMP) is desired.
ATIS 0632000.2005
$126.00
Above-Baseline Electrical Protection for Designated Telecommunications Centrol Offices and Similar-Type Facilities against High-Altitude Electromagnetic Pulse (HEMP) [Revision of T1.320-1994 (R1999)]