In October 1988, USAISC-Site R was redesignated as the 1111th U.S. Army Signal Battalion and placed under the 1101st U.S. Army Signal Brigade, Fort Lesley J. McNair, Washington, D.C., as the Army support battalion responsible for the maintenance, upkeep and communications of the AJCC Site R.
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Other designations and nicknames include "The Rock", NMCC-R (for National Military Command Center Reservation), ANMCC (for Alternate National Military Command Center), AJCC (for Alternate Joint Communications Center), "Backup Pentagon", or "Site RT"; the latter refers to the vast array of communication towers and equipment atop the mountain.
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Another tower just south of the Raven Rock Mountain Complex in southern Pennsylvania relayed signals from these two backup sites to the Washington defense facilities, along with the Pentagon, White House, the State Department and other government facilities.