[United States Senate Manual, 107th Congress] [S. Doc. 107-1] [Rules for Regulation of the Senate Wing of the Capitol and Senate Office Buildings] [Pages 172-173] [From the U.S. Government Printing Office, www.gpo.gov] 134 RULE XV LEGISLATIVE BUZZERS AND SIGNAL LIGHTS Effective May 15, 1981, the system of legislative buzzers and signal lights shall be as follows: Pre-session signals: One long ring at hour of convening. One red light to remain lighted at all times while Senate is in actual session. Session signals: One ring--Yeas and nays. Two rings--quorum call. Three rings--Call of absentees. Four rings--Adjournment or recess. (End of daily session.) Five rings--Seven and a half minutes remaining on yea and nay vote. Six rings--Morning business concluded. (Six rings with corresponding lights. Lights cut off immediately.) Recess during daily session. (Six rings with corresponding lights. Lights stay on during period of recess.) Effective July 13, 1967, the legislative call system shall be used for alerting Members of Congress, Congressional [[Page 173]] employees, and visitors of enemy attack or other major disaster conditions. There will be two signals: 1. Attack warning.--Notification to all occupants that the United States is under attack and that there is real danger of loss of life. This warning would be given by a sequence of two-second sounds of the legislative bells separated by two- second silent intervals. This signal would be repeated for 3 to 5 minutes. 2. Attention signal.--Notification of peacetime disasters, such as accidental presence of radioactive materials or severe weather or natural disaster conditions. This signal would be given by a series of 16-second bell sounds separately by 16- second silent intervals, repeated for 3 to 5 minutes. (Where lights exist they will correspond with rings.)