Press Release

Zhone to Report Fourth Quarter 2005 Financial Results

Oakland, CA — January 5, 2006 — Zhone Technologies, Inc. (Nasdaq: ZHNE), the first company dedicated to building total-delivery solutions for voice, data and video content services worldwide, announced today that it will report fourth quarter 2005 financial results on Tuesday, January 31, 2006, after the close of regular market trading.

Zhone will conduct a conference call and audio webcast to discuss further details of its fourth quarter 2005 results at 5:00 p.m. Eastern Time on January 31, 2006. This call is open to the public by dialing 866.825.1709 for U.S. callers and 617.213.8060 for international callers and entering the passcode 79940539. The audio webcast will be simultaneously available on the Investor Relations section of the Zhone website at http://www.zhone.com/about/investors/

A replay of the conference call will be available for approximately one week after the original call by dialing 888-286-8010 for U.S. callers and 617-801-6888 for international callers and entering the passcode 11042589. An audio webcast replay will also be available online at http://www.zhone.com/about/investors/ for approximately one week following the original call.

About Zhone Technologies

Zhone Technologies, Inc. (NASDAQ: ZHNE) is a global leader in all IP multi-service access solutions, serving more than 750 of the world's most innovative network operators.

The IP Zhone is the only solution that enables service providers to build the network of the future…today, supporting end-to-end Voice, Data, Entertainment Social Media, Business, Mobile Backhaul and Mobility service.

Zhone is committed to building the fastest and highest quality All IP Multi-Service solution for its customers.

Zhone is headquartered in California and its products are manufactured in the USA in a facility that is emission, waste-water and CFC free.

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
     

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