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Zhone Technologies' CEO to Speak at Thomas Weisel Partners' Tech 2007 Conference

Oakland, CA — January 31, 2007 — Zhone Technologies, Inc. (NASDAQ: ZHNE), a global provider of advanced communications equipment and a leader in the deployment of VoIP, IPTV, and Ethernet services over both copper and fiber access lines, announced today that Chairman and Chief Executive Officer Mory Ejabat will give a corporate overview presentation at the Thomas Weisel Partners' Tech 2007 Conference Monday, February 5, 2007, at 9:45 a.m. PST, at the Fairmont Hotel in San Francisco.

Zhone will conduct a live webcast of this presentation. To access the webcast over the Internet, please visit http://www.zhone.com/investors/. A re-broadcast of the presentation will be available shortly after the conclusion of the session, and may be accessed over the Internet at http://www.zhone.com/investors/.

About Zhone Technologies, Inc. (www.zhone.com)

Zhone Technologies, Inc. (NASDAQ: ZHNE) is a global provider of advanced communications equipment to more than 600 operators in both emerging and established markets. Zhone's market-leading Broadband Loop Carrier equipment enables communication operators to rapidly deploy revenue-generating access services using existing infrastructure, while providing a migration path to building a cost-efficient, all-IP access network. The company's products address a broad range of applications including residential and business broadband, VoIP, IPTV, and Ethernet services over both copper and fiber access lines.

Zhone's advanced networking solutions include its Single Line Multi-Service architecture (SLMS(TM)), Multi-Access Line Concentrator (MALC(TM)), Raptor(TM) ATM/IP DSLAMs, Zhone Residential Gateways (ZRG(TM)), GigaMux(TM) Optical Transport Systems, and Zhone Management System (ZMS(TM)). For more information, please visit www.zhone.com.

About Thomas Weisel Partners (www.tweisel.com)

Thomas Weisel Partners is an investment bank specializing in the growth sectors of the economy including the technology, healthcare and consumer sectors. The company's value added Investment Banking, Institutional Brokerage, and Equity Research groups focus on servicing U.S. and international emerging growth companies and institutional investors. Thomas Weisel Asset Management includes three private equity investment funds and a distribution management service for private equity and venture capital funds. For more information, please visit www.tweisel.com.

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