Press Release

Zhone Technologies Appoints Nancy Pierce to Board of Directors

Oakland, CA — April 19, 2010 — Zhone Technologies, Inc. (NASDAQ: ZHNE), a global leader in network access solutions for fiber, copper and wireless broadband infrastructures, today announced that Nancy Pierce has agreed to serve as a director on Zhone's Board of Directors and appoints Ms. Pierce to serve on the Audit Committee. Ms. Pierce will serve as a Class I director, with her initial term expiring at the 2011 annual meeting of stockholders.

Nancy Pierce has over 28 years experience in public and private companies in strategy, business development, corporate governance, finance, operations, legal, information systems, financing, investor and media relations, and mergers and acquisitions.

"Nancy brings both industry experience and financial expertise to Zhone's Board," stated Mory Ejabat, Zhone's Chairman and Chief Executive Officer. "We're looking forward to her input in helping guide our continued growth."

Ms. Pierce currently serves as President and Managing Director of KELD LLC, an investment management and strategic advisory company focusing on advising and investing in young technology companies. In addition to her duties as President of KELD, Ms. Pierce is on the Board of Directors at Cellport Systems in Boulder, Colorado and is the Managing Director of MCAP LLC. Ms. Pierce also serves on many advisory boards including the University of Colorado Technology Transfer Office, Escape Media Group and the University of Colorado, Denver, Business School.

Prior to KELD, Ms. Pierce was co-founder, director, chief financial officer, treasurer, corporate development officer and secretary of publicly traded Carrier Access Corporation. She served as chief financial officer and treasurer for Carrier Access from 1992 through 2001, interim chief financial officer in 2004 and corporate development officer and secretary from 2001 through 2007. Prior to co-founding Carrier Access, Ms. Pierce held senior positions at IBM and ROLM Corporation in Silicon Valley.

"I am excited about the opportunity to work with Mory and the rest of Zhone's highly regarded board members," stated Ms. Pierce. "In this role, I look forward to representing shareholder interests in my fiduciary capacity as well as making a positive contribution to help Zhone expand its role as a premier access communications equipment vendor."

Ms. Pierce has served on many public and private Boards. In addition to her board position at Carrier Access, Ms. Pierce has served as the Chairman of the Audit Committee and Chairman of the Compensation Committee on the Board of Koala Corporation, a publicly traded corporation. Ms. Pierce has a B.S. from Colorado State University, an MBA from California State University - Chico, and an honorary PhD from St. Thomas Aquinas.

About Zhone Technologies

Zhone Technologies, Inc. (NASDAQ: ZHNE) is a global leader in multi-service access solutions, serving more than 750 of the world's most innovative network operators. The company offers the industry's only fully-integrated portfolio of MSAP, FTTx, EFM and Wi-Fi access technologies resulting in improved network agility and reduced costs in delivering the full spectrum of access services, including residential and business broadband, VoIP, and High-Definition IPTV — over copper, fiber, and wireless. Zhone is headquartered in California and its MSAP products are manufactured in the USA in a facility that is emission, waste-water and CFC free.

Contacts:

Zhone Investor Relations
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Fax: +1 510-777-7001
Email: investor-relations@zhone.com
   Zhone Public Relations
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