San Jose, California, December 12, 2005 – JDSU today announced that it has shipped more than 500 HST-3000 handheld service testers as part of a multi-million dollar follow-on order from one of the largest U.S. telecommunications service providers, making it the carrier’s preferred solution for ADSL2/2+ and IP video testing.  Selected for its cost-effective and upgradeable capabilities, as well as its ability to test all “triple-play” services (VoIP, IP video and data), the HST-3000 IP video test suite is the industry’s first handheld specifically designed to meet the all-in-one test support needs of field technicians. 

The JDSU HST-3000 IP video test suite, coupled with the ADSL2/2+ and copper test features, is already used by the customer and enables it to efficiently deploy and troubleshoot IP services. The handheld tester is designed to meet the full depth and breadth of test applications required by field technicians responsible for access network service installation and maintenance.  By providing automation features that improve work force efficiency, the HST-3000 is well-suited for all network operators and service providers seeking to expand IP services to business and residential customers.  Today it is the industry-leading handheld field tester on the market, providing triple play service, ADSL2/2+, full copper, and custom scripted test capability in a single configuration.

"The broad test capabilities of the JDSU HST-3000 reduce the complexities of field testing triple-play services – a main attraction for network service providers," said Jerry Gentile, general manager of JDSU’s telecommunication field services (TFS) Test and Measurement group.  "With its VoIP, video and data test capabilities, the HST-3000 provides the industry’s most comprehensive set of access test features in a lightweight handheld instrument.  It delivers ease-of-use for the field technician that creates a more efficient test environment, which in turn accelerates triple-play service deployment and reduces truck rolls."

About the JDSU HST-3000
The JDSU HST-3000 is a modular, hand-held test tool that scales to address a broad spectrum of different access network technology testing needs, from the physical layer to the application layer. As the first hand-held field test tool to provide basic turn-up and troubleshooting of VoIP deployment, the HST-3000 supports physical layer analysis through packet metrics, signaling analysis and voice quality determination and also allows packet capture of live VoIP calls, including VoIP call storage and an integrated FTP capability to send captured VoIP calls for analysis by JDSU’s PVA-1000 software. The HST improves efficiency and lowers the costs of installing, maintaining, and troubleshooting business and residential services and networks by combining copper, voice and data service testing features with unparalleled process automation capabilities in a lightweight, battery-operated unit.

By adding ADSL2+ and IP Video test options, the HST-3000 breaks new ground in test support for triple-play service deployments and extends its capabilities for installation and maintenance crews who will be responsible for turn-up and troubleshooting these new services. The JDSU HST-3000 VoIP Tester was named Product of the Year for 2002 by INTERNET TELEPHONY® magazine.

About JDSU
JDSU (NASDAQ: JDSU; and TSX: JDU) is committed to enabling broadband & optical innovation in the communications, commercial and consumer markets. JDSU is a leading provider of communications test and measurement solutions and optical products for telecommunications service providers, cable operators, and network equipment manufacturers.  Furthermore, JDSU is a leading provider of innovative optical solutions for medical/environmental instrumentation, semiconductor processing, display, brand authentication, aerospace and defense applications, and decorative.  More information is available at http://www.jdsu.com/.

The statements contained in this press release that are not purely historical are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Act of 1934. Such forward-looking statements include, but are not limited to, any statement or implication that the products described in this press release (i) will be successfully introduced or marketed, (ii) will be qualified and purchased by our customers, or (iii) will perform to any particular specifications or performance or reliability standards. Such forward-looking statements involve risks and uncertainties that, if realized, could materially impair the Company's results of operations, business, and financial condition. These risks and uncertainties include, but are not limited to, (a) the failure of the products (i) to perform as expected without material defects, (ii) to be manufactured at acceptable volumes, yields, and cost, (iii) to be qualified and accepted by our customers, and (iv) to successfully compete with products offered by our competitors, and (b) factors discussed from time to time in reports filed by the Company with the Securities and Exchange Commission. The forward-looking statements contained in this news release are made as of the date hereof, and the Company does not assume any obligation to update or qualify any of the statements made herein. Source: JDSU Corporation.

Contacts
Media: Nick Rowan, Public Relations, 240-404-1924 or nick.rowan@jdsu.com
Investors: Jacquie Ross, Investor Relations, 408-546-4445 or investor.relations@jdsu.com