Terabeam 7200 is a laser-optical transceiver (transmitter/ receiver) used in tall buildings as a high-speed, large bandwidth data conduit. Terabeam offers an alternative to the high cost of rewiring with fiber-optic cable. By Oliver Grabes, Brady Olason, IDSA, and Fernd Van Engelen of TEAGUE; and Hal Brown, Eric Davis, Sean Driggers, Guy Fly, Steve Klein, Richard Riday and Lawrence C. Stapleton of Terabeam for Terabeam.