ADVISORY/Chorum Technologies' Dr. J.C. Chiao to Present at Metroplex Technology Business Council 4th Friday Optics & Photonics Luncheon Series Feb. 22, 2002 in Richardson, Texas.

Business Editors & High-Tech Writers

ADVISORY...for Friday (Feb. 22)

--(BUSINESS WIRE)

    WHAT: Dr. J.C. Chiao from Chorum Technologies in Richardson,
          Texas, is the guest speaker and will make his presentation,
          All Optical Signal Processing, at the 4th Friday Optics &
          Photonics Luncheon Series. The Metroplex Technology Business
          Council (MTBC) sponsors the series, in cooperation with The
          International Society for Optical Engineering (SPIE) and The
          University of Texas at Dallas Photonic Technology and
          Engineering, or PhoTec, Center. The MTBC presents leading
          speakers from the emerging industry of optics and photonics.
          The Telecom Corridor(R) has grown within the last two years
          to include more than 100 companies in optics and photonics.

    WHO: Dr. Chiao is the senior technology advisor and product line
         manager for Chorum Technologies. He also was an assistant
         professor and is now an adjunct professor in the Department
         of Electrical Engineering, University of Hawaii at Manoa.
         Prior to his university experience, he served as a research
         scientist at Telcordia in the Optical Networking Systems and
         Testbeds group. Dr. Chiao has published 74 technical journals
         and conference papers. He is one of the authors of the book
         Active and Quasi-Optical Arrays and the editor of the book
         Device and Process Technologies for MEMS and
         Microelectronics. He holds one patent and 13 pending patents
         in RF MEMS, MEMS optics and liquid-crystal technologies. He
         was the chairman for the SPIE 2001 International Micro/MEMS
         Device and Process Technologies for MEMS and Microelectronics
         Conference, and a chairman for the 2002 SMTA/IMAPS Telecom
         Hardware Solutions Conference. He received his Ph.D. from the
         MMIC group in the Department of Electrical Engineering at the
         California Institute of Technology in 1995.

    WHEN: Friday, Feb. 22, 2002
          11:45 a.m. to 1:15 p.m.
          Reservations check-in and networking begins at 11:15 a.m.

    WHERE: Radisson Hotel Richardson
           1981 N. Central Expressway
           Richardson, Texas
           For more information, call the MTBC at 972/669-3225

    ABOUT
    CHORUM: Chorum Technologies is a leading provider of all-optical
            processors and subsystems for high-capacity networks.
            Chorum Technologies' PolarWave(TM) family of optical
            filtering, switching, routing and processing technologies
            enables networks that are faster, more flexible and more
            cost effective. Chorum Technologies was founded in 1996
            and is based in the Telecom Corridor(R) of Richardson,
            Texas. For more information, visit www.chorumtech.com.

    CONTACT: For additional information, please contact:
             Kim Tompkins, Media and Analyst Relations
             214/570-3584; [e-mail]