Press Release

Zhone to Present at SG Cowen Fall Technology Conference

OAKLAND, CA — September 1, 2004 — Zhone Technologies, Inc. (Nasdaq: ZHNE) today announced it will be presenting at the SG Cowen 32nd Annual Fall Technology Conference in Boston on Wednesday, September 8th at 1:00 P.M. EDT.

A live audio webcast and replay of Zhone's presentation will be available on the Investor Relations section of Zhone's website at:

www.zhone.com/about/investors

About Zhone Technologies, Inc. (Zhone)

Zhone Technologies, Inc. (Nasdaq: ZHNE) is the first company dedicated solely to delivering the full spectrum of next-generation wireline infrastructure equipment. The company was founded by the senior management team that grew telecommunications pioneer Ascend Communications, Inc., from its startup roots to the multi-billion-dollar company acquired by Lucent Technologies (NYSE: LU). Zhone's Single-Line Multi-Service architecture (SLMS™), allows carriers to concurrently deliver voice, new premium data and video services over copper or fiber access lines. Zhone provides carriers with an elegant migration from legacy circuit-based technology to packet based networks while substantially reducing operating costs. With deployments at over 300 carriers including among some of the world's largest networks, Zhone has enabled carriers to reinvent their businesses.

Zhone, the Zhone logo, and all Zhone product names are trademarks of Zhone Technologies, Inc. Other brand and product names are trademarks of their respective holders. Specifications, products, and/or product names are all subject to change without notice. Copyright 2004 Zhone Technologies, Inc. All rights reserved.


Contacts:

Zhone Investor Relations
Tel: +1 510-777-7013
Fax: +1 510-777-7001
Email: investor-relations@zhone.com
   Zhone Public Relations
Tel : +1 404-460-8578
Email: aurora.arlet@edelman.com
  

Zhone, the Zhone logo, and all Zhone product names are trademarks of Zhone Technologies, Inc. Other brand and product names are trademarks of their respective holders. Specifications, products, and/or product names are all subject to change without notice.

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