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SCIENTIFIC-ATLANTA JOINS THE IRIDIUM(TM/SM) SATELLITE COMMUNICATIONS TEAM; WILL PROVIDE GROUND TERMINALS FOR GLOBAL COMMUNICATIONS PROGRAM

SCIENTIFIC-ATLANTA JOINS THE IRIDIUM(TM/SM) SATELLITE COMMUNICATIONS TEAM; WILL PROVIDE GROUND TERMINALS FOR GLOBAL COMMUNICATIONS PROGRAM
 ATLANTA, Nov. 5 /PRNewswire/ -- Scientific-Atlanta, Inc. (NYSE: SFA) and Motorola, Inc. (NYSE: MOT) have entered into a strategic business relationship aimed at producing earth terminals for the IRIDIUM(TM/SM) global communications program.
 Under terms of a memorandum of understanding between Scientific- Atlanta's Electronic Systems Division and Motorola's Satellite Communications Strategic Business Unit, the companies will work together to develop specifications for earth terminals to be used in IRIDIUM terrestrial satellite communications gateways. When it becomes operational, IRIDIUM will provide a worldwide digital, satellite-based, cellular personal communications system. Users will be able to transmit and receive digitized voice, data and facsimile signals via hand-held, mobile or transportable units, anywhere on earth.
 Following the memorandum of understanding phase, Scientific-Atlanta will develop and manufacture four preproduction units beginning in early 1993. Full scale production is scheduled to begin in 1994.
 John E. Breyer, president of Scientific-Atlanta's Instrumentation Group, said: "Motorola's selection of Scientific-Atlanta to provide Iridium's earth stations marks our entry into this area of the personal communications network market. Our association with Motorola and the IRIDIUM team is a natural extension of our products, systems and capabilities to support specialized global communications networks."
 Theodore R. Wieber, president of Scientific-Atlanta's Electronic Systems Division, said: "Our relationship with Motorola will put Scientific-Atlanta in the forefront of developing the next generation satellite communications ground equipment necessary to make the revolutionary concept of IRIDIUM possible. We offer the sophisticated satellite tracking technologies developed through decades of work with NASA, the Department of Defense and other agencies which are critical to orbiting satellite communications systems such as IRIDIUM."
 The IRIDIUM system will include a constellation of small, smart satellites in low-earth orbit networked together as a switched digital communications system. IRIDIUM satellites will provide continuous line- of-sight coverage from and to any point on the earth's surface, as well as all points within an altitude of about 10 miles. Unlike existing geosynchronous satellite-based communications systems, the low-earth orbit of approximately 421 nautical miles will significantly reduce the phenomenon of voice delay.
 The system will also include terrestrial gateways which will interface into the public switched telephone network. A typical gateway will consist of three earth terminals geographically dispersed to ensure continuous satellite communications service and high availability under various environmental conditions. Each earth terminal will contain a satellite tracking antenna and the necessary radio frequency and processing components to provide full duplex communications with an IRIDIUM satellite.
 While the IRIDIUM system is new, each of the technologies upon which it is built are tried and proven. The program is an extension of three technology areas: cellular communications (including a broad line of subscriber equipment), satellite systems and communications networks and switching. The first satellites are planned for launch in 1996 with the constellation complete and operational by 1998.
 Scientific-Atlanta is a world leader in broadband communications systems, cable television electronics, satellite-based communications networks and instrumentation for industrial, telecommunications and government applications. Electronic Systems, a division within the company's Instrumentation Group, is a leader and worldwide supplier of remote sensing ground stations, satellite tracking systems and telecommunications instrumentation equipment.
 NOTE: IRIDIUM is a trademark and service mark of Motorola, Inc.
 -0- 11/5/92 R
 /NOTE TO EDITORS: Color photos are available./
 /CONTACT: E. Scott Wood of Scientific-Atlanta, 404-903-2503 or, home, 404-963-8293/
 (SFA MOT) CO: Scientific-Atlanta, Inc.; Motorola, Inc. ST: Georgia IN: CPR SU:


EA-BN -- AT003 -- 7722 11/05/92 12:41 EST
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Date:Nov 5, 1992
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