ADVISORY/Chorum Technologies' CEO, Scott Grout, to Present At Credit Suisse First Boston Communications Technology Conference in Phoenix.

Business Editors

ADVISORY for...Tues (May 15)

--(BUSINESS WIRE)

WHAT:             Scott Grout, CEO and president of Chorum
                  Technologies in Richardson, Texas, will present at
                  Credit Suisse First Boston's (CSFB) Annual
                  Communications Technology Conference. The CSFB
                  Technology Conference is a three-day event where
                  more than 150 institutional investors and more than
                  100 high-level executives from technology companies
                  across the United States and Europe converge for one
                  of the most impressive forums on communications
                  during the year.

WHO:              Scott Grout, CEO and president, Chorum Technologies

                  Scott Grout is president and CEO of Chorum
                  Technologies. Since his appointment in 1998, the
                  company has grown from a strong, technology-focused
                  company, to a company with a broad product family
                  and volume deliveries to many leading next-
                  generation optical communications providers. Grout
                  has more than 16 years of fiber-optic,
                  communications systems and networking experience. He
                  was formerly vice president of product management
                  and marketing in Lucent Technologies' Optical
                  Networking Group. During his tenure with AT&T's
                  Professional Services division, Grout worked on a
                  number of key aspects of the spin-off to form
                  Lucent, including placement of company's finance,
                  personnel, products and processes resources, as well
                  as the preparation and execution of Lucent
                  Technologies' initial public offering in April 1996.
                  He holds a bachelor of science degree in engineering
                  from the University of Wisconsin -- Madison and a
                  master of business administration degree from the
                  Sloan Fellowship Program at the Massachusetts
                  Institute of Technology.

WHEN:             Tuesday, May 15, 2001 at 11:00 a.m.

WHERE:            Arizona Biltmore
                  2400 East Missouri Road at 24th Street
                  Phoenix, Ariz. 85016
                  Arizona Biltmore Resort and Spa
                  Main telephone: [phone]; Fax: [phone]

ABOUT CHORUM:    Chorum Technologies, Inc. is a leading provider of
                 all-optical processors and subsystems in the
                 fast-growing fiber-optics market. The company's
                 PolarWave(TM) family of optically filtering,
                 switching, routing and processing technologies
                 enables networks that are faster, more flexible and
                 more cost effective than today's networks. Chorum
                 Technologies Inc. was founded in 1996 and is based in
                 the Telecom Corridor(R) of Richardson, Texas. For
                 more information, visit www.chorumtech.com.