Castelle to Exhibit Its Network Fax Servers at PC Expo in New York City, October 5-7, 2004

Business Wire, Oct 5, 2004

MORGAN HILL, Calif. & NEW YORK -- Castelle (Nasdaq:CSTL), a market leader in fax solutions for small to medium-sized workgroups and enterprise applications, today announced that it will be exhibiting its network fax servers at PC Expo, October 5-7, 2004, in New York City.

"We look forward to demonstrating our FaxPress and FaxPress Premier network fax servers at this year's PC Expo," said Scott McDonald, President and CEO of Castelle. "Last month, we released two new FaxPress Premier products -- a 4-line analog and an 8-channel fractional T1 -- that bring the enterprise-level functionality of FaxPress Premier to medium-sized businesses and workgroups. By participating in events such as PC Expo, we are able to meet face-to-face with our customers, partners and prospects, increase awareness of Castelle's fax server appliances, and respond to customer needs within the fax marketplace."

Castelle will be one of over 200 exhibitors at PC Expo 2004. PC Expo is part of TechXNY, New York's Technology Week, which provides business solutions in areas such as networking, storage, security, internet and wireless. The week-long event consists of a series of educational conferences, events, and exhibits that bring together over 25,000 business and IT professionals in healthcare, financial, and retail, among others. For more information on PC Expo and TechXNY, visit the event web site at www.techxny.com.

Network Fax Servers for Business and Enterprise

Castelle's two fax server product lines, the FaxPress and the FaxPress Premier, offer every possible computer-based, network fax option: desktop PC faxing, production faxing, fax and email integration, workflow application integration, as well as tools for developing custom fax applications. FaxPress ranges from an entry-level, single-line unit to an eight-line server. FaxPress Premier provides unmatched scalability for mid-size to enterprise-level organizations. FaxPress Premier Analog supports up to 16 analog fax lines; FaxPress Premier Digital provides high-volume fax support for fractional T1, T1, E1 and ISDN lines. Offering straightforward integration with virtually all computing applications, messaging environments and telephony interfaces, the FaxPress and FaxPress Premier product lines provide network fax solutions tailored to meet the needs of any organization, whether it's a small business or a large enterprise with thousands of users.

About Castelle

Castelle, a market leader in fax solutions for small to medium-sized workgroups and enterprise applications, develops office automation systems that allow organizations to easily implement faxing and printing over local area networks and the Internet. Castelle's network fax servers, FaxPress and FaxPress Premier, provide a simple way to integrate fax with email, desktop and back-end applications. Castelle products are designed to be easy to use and maintain, and provide an economical way for companies to share resources over the network. Castelle was founded in 1987 and is headquartered in Morgan Hill, California. Its products are available through a worldwide network of distributors, resellers, online retailers, and the Castelle Online Store. Visit Castelle online at www.castelle.com.

FaxPress(TM) and FaxPress Premier(TM) are trademarks of Castelle. All other products and trademarks are the property of their respective owners.

If you would like to be added to Castelle's investor email list, please contact Karin Smith at ksmith@castelle.com.

Forward-Looking Statements

This press release may contain forward-looking statements. These statements are subject to risks and uncertainties. Investors are referred to the full discussion of risks and uncertainties associated with forward-looking statements as contained in our reports to the Securities and Exchange Commission, including our Form 10K. The Company assumes no obligation to update the forward-looking information.