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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 10-K

Commission File Number: 000-25291

TUT SYSTEMS, INC.
(Exact name of Registrant as specified in its charter)

Registrant's telephone number, including area code: (503) 594-1400

Securities registered pursuant to Section 12(b) of the Act:

None

Securities registered pursuant to Section 12(g) of the Act:

Common Stock, $0.001 par value
(Title of Class)

        Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ý No o

        Indicate by check mark if disclosure of delinquent filers pursuant to item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant's knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. o

        Indicate by check mark whether the registrant is an accelerated filer (as defined in Exchange Act Rule 12b-2). Yes ý No o

        The aggregate market value of voting stock held by non-affiliates of the Registrant was approximately $78,767,255 as of June 30, 2003 based on the closing price of the common stock as reported on The Nasdaq National Market for June 30, 2003. There were 20,276,454 shares of the Registrant's common stock issued and outstanding on January 26, 2004.

DOCUMENTS INCORPORATED BY REFERENCE

        Certain information called for by Part III is incorporated by reference to the definitive proxy statement for the annual meeting of the stockholders, which will be filed with the Securities and Exchange Commission not later than 120 days after December 31, 2003.

TUT SYSTEMS, INC.
ANNUAL REPORT ON FORM 10-K
TABLE OF CONTENTS

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PART I

IMPORTANT NOTE ABOUT FORWARD-LOOKING STATEMENTS

        This Annual Report on Form 10-K contains "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These statements may generally be identified by the use of such words as "expect," "anticipate," "believe," "intend," "plan," "will," or "shall." We have based these forward-looking statements on our current expectations and projections about future events. Such forward-looking statements are subject to various risks and uncertainties that could cause actual results to differ materially from those projected in such statements. These risks and uncertainties include those set forth under "Risk Factors" and "Management's Discussion and Analysis of Financial Condition and Results of Operations." The forward-looking statements contained in this annual report include statements about the following: (1) our belief that video products will provide most of our growth opportunities for the foreseeable future, (2) our belief that the number of telco video subscribers will grow significantly between 2003 and 2007, (3) our intention to maintain our leadership in the digital TV headend market, (4) our intention to expand our relationship with value-added distributors and partners in Europe and Asia, (5) our intention to expand and further specialize our video trunking products for surveillance and broadcast TV backhaul applications, (6) our anticipation that we will introduce products to support new MPEG-4 Standard and Windows Media 9 technologies, (7) our expectation that small to medium size IOCs in the U.S. will remain our primary near term customers for Astria products, (8) our belief that our cash and cash equivalents as of December 31, 2003 are sufficient to fund our operating activities and capital expenditure for the next twelve months, (9) our expectation that working capital will begin to increase in future periods, (10) our expectation that we will seek additional equity funding in the first quarter of 2004 and (11) our expectation that customers outside of the United States will represent a significant and growing portion of our revenue.

        The cautionary statements contained under the caption "Risk Factors" and other similar statements contained elsewhere in this prospectus, including the documents that are incorporated by reference, identify important factors with respect to such forward-looking statements, including certain risks and uncertainties that could cause our actual results, performance or achievements expressed or implied by such forward-looking statements.

        Although we believe that the expectations reflected in such forward-looking statements are based upon reasonable assumptions, no assurance can be given that such expectations will be attained or that any deviations will not be material. We disclaim any obligation or undertaking to disseminate any updates or revision to any forward-looking statement contained herein or reflect any change in our expectations with regard thereto or any change in events, conditions or circumstances on which any such statement is based.

ITEM 1.    BUSINESS

Overview

        Our principal executive offices are located at 6000 SW Meadows Drive, Suite 200, Lake Oswego, Oregon, 97035. Our telephone number is (503) 594-1400. We were incorporated in California in August 1983, began operations in August 1991, and reincorporated in Delaware in September 1998. Our financial information is set forth in Item 8 to this annual report, which is incorporated herein by reference. A discussion of factors potentially affecting our operations is set forth in "Management's Discussion and Analysis of Financial Condition and Results of Operations—Additional Risk Factors that Could Affect our Operating Results and the Market Price of our Stock," in Item 7, which is incorporated herein by reference.

        We design, develop and sell video content processing systems that optimize the provisioning of broadcast digital TV services across telephone company networks. We also design, develop and sell digital video trunking systems for applications across TV broadcast, government and education

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networks and private broadband network systems that enable the delivery of broadband data services over existing copper networks within hotels and private campus facilities.

        Historically, we derived most of our sales from our private broadband network systems. In November 2002, we acquired Videotele.com, Inc., or VTC, from Tektronix, Inc. to extend our product offerings to include video content processing and video trunking systems. These video products now represent a majority of our sales and will provide most of our growth opportunities for the foreseeable future.

Industry Background and Dynamics

Growing Demand for Triple Play of Voice, Video, and Data Services

        Historically, traditional telephone companies, or telcos, have been the sole providers of voice services to the residential market in the United States. On the other hand, cable television operators, with competition from satellite beginning in the 1990s, have been the primary providers of multi-channel video services. More recently traditional telephone companies and cable operators have become direct competitors for the growing market for high-speed Internet access. Thus far in the United States, cable operators have been more successful than telephone companies in delivering high-speed Internet access, as evidenced by the 14.5 million cable-modem subscribers compared with only 8.2 million DSL users as of September 30, 2003, according to CyberAtlas. In addition, many large cable operators have begun to offer basic local and long distance telephony to their customers as a "triple play" bundle of services including voice, video and data over the same network under one monthly bill. Thus, telcos that today trail the multi-system cable operators in market share for broadband data services, are also at risk of losing traditional voice lines to both cable operators offering a triple-play bundle of services and to wireless vendors that compete on price and mobility.

        As a result of these competitive threats, large telcos are beginning to look at their broadband DSL infrastructure as a vehicle to offer broadcast TV services to better compete for the end customer with a triple-play of voice, video, and data services. At the same time, many small independent operating telephone companies, or IOCs, and international carriers are recognizing the stand-alone revenue and margin attainable by offering video services over DSL, and many of these companies have or are planning to install digital TV headends to feed their DSL infrastructure. According to InStat/MDR, the number of telco video subscribers worldwide will increase from 572,000 at the end of 2003 to over 19.0 million by the end of 2007.

Technical Challenges for Delivering Broadcast Quality Video over Telco Networks

        To deliver broadcast quality video, a non-satellite based service provider must deploy a digital TV headend to receive national and local broadcast TV signals, properly process these signals, and transmit them over fiber, cable or copper-based DSL facilities. The limited bandwidth capacity of telco DSL facilities when compared with the high bandwidth capacity of cable facilities means that the content processing performance of a telco digital TV headend is crucial to the success of deployment. Thus, while digital TV headends deployed by cable operators have been able to simply pass through TV signals to their hybrid fiber coax network without further video compression, telcos must compress the widely varying bit rate of the source signal to a low constant bit rate for transmission over their DSL network. In addition, telcos use a mix of ATM, IP, and RF transport protocols that often require video signals to be converted between these transport protocols and networks.

Technical Advancements Are Increasing the Available Market for Telcos to Deliver Video

        The bandwidth and distance limitations of the copper based "last mile" constrain both the number of video channels that may be delivered simultaneously over a DSL system and the number of customers that can be served by DSL with sufficient bandwidth for video. Emerging advancements in

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video compression technology, which include MPEG-4 and Windows Media 9, will allow high quality video streams to be transported at bit rates below 2.0 Mbps. These emerging technologies also introduce the possibility of delivering HDTV over bandwidth constrained ADSL lines for the first time. Additionally, continued DSL-based advancements, such as ADSL2+, which doubles the available downstream bandwidth, thereby enabling higher bit rates over longer distances, will enable telcos to reach a higher percentage of their customers with a larger number of video channels.

        While DSL technology will continue to dominate telco broadband networks for the foreseeable future, telephone companies are beginning to construct FTTP networks to their customers. These networks will eliminate bandwidth limitations on delivering higher speed data services and high-quality video offerings, but they will continue to require advanced video content processing to convert signals between ATM, IP, and RF domains.

Limitations on Video Trunking Market

        Video trunking is the transmission of digital video signals over long distance networks for private network applications such as video backhaul, video surveillance, and video conferencing. Video trunking shares a common technology base with broadcast video applications. Like the broadcast market, this market is also characterized by tradeoffs between the cost of broadband facilities and the cost of low-bit-rate encoders to reduce the need for bandwidth. The particular video source may be a signal from a local TV station that needs to be brought back to a regional or statewide digital TV headend that is 100 miles away, it may be a signal received from an outdoor surveillance camera that needs to reach a viewer hundreds of miles away, or it may be a signal from a university seminar that needs to feed multiple remote classrooms. We believe that this market will also expand as advanced video encoding techniques lower the bandwidth requirements for transmitting video signals.

Our Solutions

        Our suite of products is focused on enabling the delivery of broadcast quality video over traditional telco networks. We leverage our previous 20 years of experience as a former subsidiary of Tektronix to develop video-based products that meet the special content processing requirements of our telco customers. Unlike standard cable headends, our digital TV headend solution, the Astria Content Processor product family, converts the variable bit rate signal received as input into constant bit rate IP or ATM video streams for subsequent delivery over telcos' various access networks. Today, our high-performance, cost-effective systems are based on the MPEG-1 and MPEG-2 standards and we are developing upgrades (for introduction in the second half of 2004) to support the new MPEG-4 and Windows Media 9 compression technologies that will provide lower encoding rates and more advanced interactivity. We believe that these lower encoding rates will enable our customers to extend the reach of video services and deliver HDTV over bandwidth-constrained copper networks. To date, customers for our video content processing systems include independent operating companies in North America, such as Oxford Networks, and international incumbent carriers, such as PCCW in Hong Kong.

        Our M2 video trunking systems take advantage of our advanced content processing technology for private network applications such as broadcast video backhaul, video surveillance, and video conferencing in which digital video signals are "trunked," or transmitted, over long distance networks. These systems are the latest in a long line of video trunking products that began with the devices first used to transport video from the 1980 Winter Olympics in Lake Placid, New York and are now used in a number of mission-critical applications within U.S. government agencies.

        We also offer a set of private broadband network systems that enable the provisioning of broadband data services over existing copper networks within hotels and private campus facilities. Customers for our broadband data systems include system integrators, competitive carriers for the hospitality industry and private educational and commercial entities.

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Strategy

        Our objective is to be the leading provider of video-based content processing solutions for the delivery of advanced video services to residential customers over telephone company networks. Key elements of our business strategy are as follows:

Maintain Market Leadership in North American Telco Market for Digital TV Headends

        As of December 31, 2003, over 50 of our digital TV headend systems have been deployed serving over 60 North American IOCs, which we believe represents over 50% of the global installed base of telco digital TV headends. There are over 1,000 IOCs in North America today, many of which are examining their current broadband infrastructure as a means to provide additional services in order to compete for customers. These IOCs represent a significant potential market for our digital TV headend services. As additional IOCs begin to introduce bundled voice/data/video services over their legacy copper and new FTTP networks, we intend to maintain market leadership by continuously adding advanced content processing upgrades to our Astria product line. Our development efforts are focused on introducing new compression technologies such as MPEG-4 and Windows Media 9 that will be available as an upgrade option to our installed base. These compression technologies will allow our telco customers to address a larger percentage of their geographic market and to enable the delivery of advanced video services such as HDTV.

Expand Sales Efforts to Large Service Providers and International Markets

        While we continue to grow our North American IOC customer base, we are strengthening our direct sales force to focus on major North American and European service providers that see a need for full-service broadband deployment. We have also had early success with two major international carriers and intend to expand our relationships with value-added distributors and partners in Europe and Asia. Each of these larger service providers represents an opportunity for multiple digital TV headend deployments.

Accelerate Market Adoption of Video Over Telco Networks

        To encourage service providers to more rapidly accept the business case for video over telco networks, we are working simultaneously on several initiatives to:

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continue to educate the market on the viability of our current solutions by using our customers as references and benchmarks for prospective customers. To do so, we will continue to host user group conferences, speak at public conferences, issue joint press releases with new customers and arrange meetings between potential and current customers;



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offer advanced encoding technologies as soon as practical to increase the available market and allow new services such as HDTV;



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continue to work with and lead standards bodies to facilitate the broad adoption of new technologies and standards; and



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continue to work with partners to simplify and lower the cost of deploying end-to-end solutions.

Partner with Leading Industry Vendors to Provide End-to-End Solutions

        To deliver a complete end-to-end video solution, we are partnering with leading industry vendors that provide key system elements such as broadband access systems, set-top boxes, VOD systems and service management software that, together with our Astria content processor products, provide a complete video solution. Therefore, our business development and strategic marketing efforts will focus on working with such partners to facilitate a cost-effective, ready-to-deploy, high-performance solution

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based on customers' architecture and business requirements. Our strategy with these partners is to design, develop and market end-to-end systems solutions that will allow any video content, including broadcast TV, VOD and streaming media from the Internet, to be carried over any telephony network, such as IP or ATM, fiber, coax or copper, to any TV, PC, personal digital assistant or other similar device.

Leverage Our Video Compression Technology to Grow Our Video Trunking Business

        We will continue to incorporate technologies developed for our Astria TV headend product line into our video trunking products to provide additional capabilities and enhance performance for current and future customers. Additionally, we will continue to partner with other industry vendors for applications among new potential customers, such as large corporations and educational institutions. We intend to expand and further specialize our video trunking products for surveillance and broadcast TV backhaul applications, and we will seek new distribution channels for the M2 product line.

Selectively Pursue Acquisitions to Expand Our Markets and Product Offerings

        In addition to our internal research and development efforts, we continually evaluate acquisitions of companies and technologies that could extend our product offerings, technology expertise, industry knowledge and global customer base. Since 2000, we have completed four acquisitions, including the acquisition of VTC in November 2002. The products and technologies that we acquired through these acquisitions have facilitated our entry into new markets, expanded our product line in existing markets and added additional technical expertise to develop new products for evolving markets in the future. Going forward, acquisition efforts will be focused on targets that will extend our existing video-based products and markets.

Our Products

        We design, develop and sell:

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video content processing systems that optimize the provisioning of public broadcast digital TV services across telephone company networks;



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digital video trunking systems for applications across TV broadcast, government and education facilities; and



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private broadband network systems that enable broadband data services over existing copper networks within hotels and private campus facilities.

Video Content Processing Systems

        Our Astria video content processing platform is typically used by carriers at a digital TV headend location to process hundreds of TV channels for delivery over any broadband access network.

Astria CP (Content Processor)

        Our Astria CP is a third-generation, chassis-based platform that we have specifically designed for the digital TV marketplace. The Astria CP uses patent-pending QualView™ applications to deliver high quality video when converting satellite-based variable bit rate video and audio to groomed constant bit rate content for delivery over telco networks using either IP or ATM protocols. These QualView applications include de-multiplexing of satellite signals, digital turnaround of MPEG-2 channels, conversion of transport streams into IP or ATM formats and analog or digital MPEG encoding.

        The Astria CP platform can process up to 200 video and audio channels per chassis, depending on the type of processing required. The platform integrates with IP, ATM, IP over ATM, or DVB-ASI

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networks providing ultimate flexibility when designing a commercial video delivery system. Astria CP is populated with flexible Quad Stream Processor, or QSP, modules that can be configured and reconfigured with a simple software download to enable a variety of video processing functions. For example, one QSP can be utilized to de-multiplex a multi program transport stream from a satellite. The de-multiplexed channel or single program transport stream can then be routed to another QSP for bit rate reduction that is required for transport over a DSL access network.

        Today the Astria CP processes video content in standard MPEG-1 or MPEG-2 formats. We are developing upgrades to the Astria family of products to support the new MPEG-4 standard and Windows Media 9 encoding that will provide lower encoding rates and more advanced interactivity than MPEG standards currently provide. We anticipate introducing these capabilities in the second half of 2004. These capabilities will enable our customers to reach the next stage in bit rate reduction without having to upgrade their complete headend, thus preserving the customer's original investment. We believe that these lower encoding rates will enable our customers to extend the reach of video services and deliver HDTV over bandwidth constrained copper networks. This will also enable video streams to be easily viewed from the large base of PCs running Windows Media or MPEG-4 players.

Astria RCP (Remote Content Processor)

        For service providers delivering digital TV over regional or statewide, IP or ATM backbone networks, our Astria RCP provides an affordable way to distribute video signals sourced from a single digital TV headend. The Astria RCP typically accepts pre-processed MPEG-2 video from a centralized Astria CP via a fiber backbone network and performs appropriate protocol conversion for delivery of the video streams to a variety of ATM, IP or RF-based telco access networks. The Astria RCP can also be used to encode local channels. This flexibility allows service providers to place Astria RCPs at the edge of a fiber optic transport network and deliver aggregated and localized content enabling customization of a channel line-up to a specific region or community. The ability to add or drop channels into the line-up at the edge of the transport network allows service providers to incorporate local programming, advertising, and emergency alert system content. This creates a complete mix of content that is relevant to local subscribers.

Aveon™ Element Management System

        Our Aveon Element Management System enables the service provider to configure and monitor Astria CP and RCP systems across wide area networks. The ability to use Aveon to create a single view of the network gives service providers a simple to use yet powerful tool for controlling all aspects of operating a video network from one centralized location.

Video Trunking Systems

        Our M2 video trunking product line leverages the video compression technology that is used within the Astria product line, but M2 products are packaged in a smaller form factor for private video backhaul applications.

        Our M2-400 product line was introduced in the second quarter of 2003 and is our premier video trunking system for delivering mission critical, high-quality MPEG video in real-time for private network applications. The M2-400 system is the latest in a long line of video trunking products. Each M2-400 chassis is designed to hold multiple encoders, decoders and network interfaces. Encoding options are available ranging from MPEG-1 at 400 kbps to advanced MPEG-2 compression at 40 Mbps. The M2-400 works across satellite, terrestrial switched, point-to-point and Ethernet-based networks. An embedded web server controls and manages the M2 product line via an intuitive web-based graphical user interface, enabling administration of the product from any location on an IP

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network. The M2-400 is also supported by third-party scheduling software for video conferencing and distance learning applications.

        Our M2-10x product family was also introduced in 2003 for those trunking applications that only require a single encoder or decoder per end-point. For example, one of our digital TV headend customers uses the M2-10E to encode local events on site for addition to its basic lineup of broadcast channels, helping it differentiate its service offering from the national network-based offerings of the satellite television vendors.

Private Broadband Network Systems

        Prior to our entry into the video content processing business with our acquisition of VideoTele.com in November 2002, our primary focus was on the sale of our private broadband network systems. The market for these systems is characterized by the need to transport high-speed data signals across private buildings or campus locations, where the only available transmission facility is composed of ordinary telephone wires. We have been a leader in this market since the introduction of our first XL product in 1992. Examples of applications within this market include i) connecting hotel guests to broadband Internet service over the hotel's telephone wires, ii) connecting multiple devices across public transportation facilities to a backbone network, and iii) connecting local area networks across a business campus without having to run new wires or cables.

        For broadband Internet applications across multi-tenant complexes such as hotels, apartments and private campus facilities, our Expresso line of products, using proprietary transmission technology, provides low-cost, plug-and-play Ethernet solutions that can deliver broadband Internet access to multiple nodes over a single pair of copper wires simultaneously being used for telephone service. We recently added Ethernet over VDSL line cards to our existing Expresso chassis and have begun deploying these higher speed products for customers who want to deliver broadcast TV and/or VOD service in addition to Internet service throughout a multi-tenant complex.

        Our XL line of Ethernet extension products is often used by individual enterprises to extend their Ethernet networks over distances that cannot be accommodated by standard Ethernet wiring. Our XL products operate over distances of up to 20,000 feet and at bit rates up to 10 Mbps, all over a single pair of ordinary telephone wires. In certain situations these XL products are used in combination with our M2 products to support the encoding of local content to feed digital TV headends.

        Our Expresso and XL transport products are augmented by our Expresso SMS subscriber management system, which authenticates users, manages bandwidth and IP addresses, and processes credit card or password information for billing purposes. SMS systems are typically found in hotels that offer broadband Internet service to guests, in campus housing complexes to manage broadband Internet access, and in wireless "hot spots" such as hotel lobbies and Internet cafes.

Overall System Level Design Criteria and Integration

        Our Astria products must interoperate with other products from third parties to enable a complete end-to-end broadcast TV system. To ensure proper interoperation for our customers, we offer a system integration service whereby we purchase, assemble, configure and test key components together before delivering the integrated system to the customer. Typical third-party components include satellite receivers and decoders, network switches and routers, RF modulations units, and middleware servers and software.

        Our various systems and product lines are designed to incorporate technical standards developed by worldwide organizations, including International Telecommunications Union (ITU), Institute of Electrical and Electronic Engineers (IEEE), Internet Engineering Task Force (IETF) and the Full-Service VDSL Committee. Important capabilities supported by these standards include ATM

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Quality of Service, MPEG encoding, Internet Group Management Protocol, Dynamic Host Configuration Protocol, Network Address Translation, and IP protocol stack/encapsulation over ATM. To build upon these standards and to further enhance our products' service capabilities, we use proprietary rate control techniques and other bandwidth management techniques to allow service providers to efficiently create and deploy new service packages for additional revenue opportunities.

Customers and Markets

        Our target customers for our video content processing systems are telephony-based incumbent local exchange companies, independent operating companies and international post, telephone and telegraph companies that aim to deliver advanced video services over their existing copper, fiber or coaxial cable infrastructures. Target customers for our video trunking systems include TV broadcasters, government agencies, and educational institutions. Customers for our private broadband network systems include system integrators, competitive carriers for the hospitality industry, and private educational and commercial entities.

Service Providers

        Over 60 independent operating companies in the United States now use our Astria products to deliver digital TV over DSL and other broadband networks. We installed our first commercial digital TV headend at Chibardun Telephone Cooperative in Dallas, Wisconsin in 2000. Since that time, we have deployed our digital TV headend solution to IOCs ranging in size from less than 5,000 to over 90,000 access lines.

        Our international sales to service providers have been concentrated among three large carriers. In 2002, Telenor AS, Norway's largest telecommunications provider with more than 1.8 million customers, launched a trial of digital TV services over its network using an Astria CP. In 2003, PCCW, which acquired the former Hong Kong Telephone Company in 2000, launched service to its customers from an Astria headend and signed up more than 150,000 customers to its DSL-based TV service in the first two months after launch. Additionally in 2003, our private broadband network products were deployed by Telefonos de Mexico, S.A., or TelMex, to offer nation-wide wireless Internet "hot spots" in Mexico's major public facilities such as airports, hotel lobbies, restaurants and hospitals.

        We expect the small to medium size IOCs in the United States to remain the primary near-term customers for Astria products as the larger carriers continue to explore and test the markets and technologies for DSL-based video services and fiber based video services.

Distributors and System Integrators

        We market our private broadband network systems to domestic and international system integrators who in turn market and sell our products to educational and government institutions, commercial enterprises, regional competitive service providers and national carriers. Our distributors and system integrators range from local resellers to large volume distributors such as Ingram Micro Inc., and include international integrators such as Siemens AG in Europe.

Marketing, Sales and Customer Support

Marketing

        We seek to increase both the demand and visibility of our products in the marketplace. In addition to customer-specific sales efforts, our marketing activities include presentations and demonstrations at major and regional industry tradeshows and conferences, distribution of sales and product literature, operation of a web site, direct marketing, and ongoing communications with the press and industry analysts. As appropriate, we enter into cooperative marketing and/or development agreements with

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strategic partners that may include key customers, semiconductor manufacturers, manufacturers of radio, fiber, or video equipment, set-top box manufacturers and others.

Sales

        In North America, we sell our products primarily to service providers and through multiple sales channels, including a select group of regional value added resellers, system integrators and distributors. Internationally, we sell and market our products through systems integrators and distributors. We have regional account managers throughout the United States and sales offices in Beijing and Hong Kong, China and Oxford, United Kingdom. For the year ended December 31, 2003, we derived 18.4% of our revenue from customers outside of the United States.

Customer Support

        We believe that consistent high-quality service and support is a key factor in attracting and retaining customers. Service and technical support of our products is coordinated by our customer support organization. Our systems application engineers, located in each of our sales regions, support pre-sales and post-sales activities. Customers can also access technical information and receive technical support via our web site.

        Our systems integration group in Cary, Illinois integrates our solution with third party equipment and then tests, delivers and installs complete headend systems for our customers that require an end-to-end solution.

Research and Development

        Our research and development efforts are focused on enhancing our existing products and developing new products through our emphasis on early stage system engineering. As a result of our acquisition of VTC and the large market opportunity that it offers, most of our research and development efforts relate to our video content processing technologies. The product development process begins with a comprehensive functional product specification based on input from the sales and marketing organizations. We incorporate feedback from end users and distribution channels, and through participation in industry events, industry organizations and standards development bodies, such as the Broadband World Forum and MPEG-4 Industry Forum. Key elements of our research and development efforts include:

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Core Designs. We develop and/or acquire platform architectures and core designs that allow for cost-effective deployment and flexible upgrades that meet the needs of multiple markets and applications. These designs emphasize quick time to market and future cost reduction potential. The Astria, M2, Expresso, and Expresso SMS platforms are a direct result of this effort.



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Product Line Extensions. We seek to extend our existing product lines through product modifications and enhancements in order to meet the needs of particular customers and markets. Products resulting from our product line extension efforts include the Astria RCP and the M2-400.



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Use of Industry Standard Components. Our design philosophy emphasizes the use of industry standard hardware and software components whenever possible to reduce time to market, decrease the cost of goods and reduce the risks inherent in new design. We maximize the use of third party software for operating systems and certain protocol stacks, which allows our software engineers to concentrate on hardware-specific drivers, user interface software and advanced features.



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New Technologies. We seek to enhance our product lines by incorporating emerging technologies, such as MPEG-4, Windows Media 9 compression, advanced multi-service stream processing,

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higher speed fiber interfaces and new network management software features. Additionally, our active involvement in industry based standards associations, such as the MPEG-4 standards body, enables us to incorporate recommended platform architectures and standards into our technology.

Intellectual Property

        Our success and ability to compete depends in part upon on our proprietary technology and our ability to protect that technology. We rely on a combination of patent, copyright and trade secret laws and non-disclosure agreements to protect our proprietary technology. We currently hold 49 United States patents and have 21 United States patent applications pending. Furthermore, as a result of our acquisition of VTC, Tektronix has agreed not to assert against us or any of our affiliates or customers any of its patents filed or invented prior to the closing date of that acquisition or any later derivatives of those patents that cover our products for generating, processing or delivering video, audio or data for the education, entertainment, conferencing or security markets. We leverage readily available technology and standard components by adding proprietary software enhancements to gain competitive advantage, increase performance and lower cost. In addition, we have substantial trade secrets in the area of processing and managing video streams.

Manufacturing

        We do not manufacture any of our own products. We rely on contract manufacturers and third party OEMs to manufacture, assemble, test and package our products. We require International Organization for Standardization (ISO) 9002 registration for our contract manufacturers as a condition of qualification. We monitor each contractor's manufacturing process performance through audits, testing and inspections. Each contractor's quality is also rigorously assessed through incoming testing and inspection of packaged products received from each contractor. In addition, we monitor the reliability of our products through in-house repair, reliability audit testing and field data analysis.

        We currently purchase a substantial portion of the raw materials and components used in our products through contract manufacturers. We forecast our product requirements to maintain sufficient product inventory to ensure that we can meet the required delivery times demanded by our customers. Our future success will depend in significant part on our ability to obtain manufactured products on time, at low costs and in sufficient quantities to meet demand.

Competition

        The market for video and broadband data systems is intensely competitive, and we expect that this market will continue to become more competitive in the future. Our immediate competitors for digital TV markets are primarily small private companies that are focused on a more narrow product line than ours and thereby may be able to devote substantially more targeted resources to developing and marketing new products than we can. In targeting, larger telco customers, we compete with larger public companies, including Harmonic, Motorola and Tandberg Television. These competitors have achieved success in providing headend components for cable multiple system operators and satellite TV providers. Although their products have been designed specifically to meet the needs of cable networks, we expect these competitors to market some of their products for use in TV over DSL applications. We attribute our success in this market to the quality, cost-effectiveness and unique capabilities of our video content processing systems.

        Our competition in the video trunking market primarily comes from small private companies and public companies such as Optibase and Tandberg that together offer a wide array of products with special features and functions. A few of these companies also compete with us in the content processing digital TV headend market. Our competitive success in this market has depended upon our

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having the right form factor and set of features required for a specific application, our long established channels of distribution and our ability to quickly modify an existing product to support the required features.

        Our private broadband network business tends to compete against public, private and foreign network equipment companies. To maintain our competitive position in the private broadband market, we have focused our product development efforts on cost reduction and feature enhancement. Our expertise in particular vertical markets such as the hospitality industry, and our relationships with system integrators in those markets allow us to compete more effectively against larger competitors.

        All of our competitors may undertake more extensive marketing campaigns, adopt more aggressive pricing policies and devote substantially more resources to developing new products than we can. There can be no assurance that we will be able to compete successfully against current or future competitors or that competitive pressures that we face will not harm our business.

Backlog

        Orders for certain of our video content processing and video trunking system products are cancelable by the customers at any time until delivery of the product to and acceptance of the product by the customer. Therefore, while we currently have backlog of our products, we do not believe that product backlog provides a meaningful indicator of future sales trends and is not material to an understanding of our overall business.

Employees

        As of December 31, 2003, we employed 102 people, including 16 in manufacturing operations and customer support, 33 in sales and marketing, 36 in research and development and 17 in general and administrative.

        During each of the past three years we have reduced our work force as a result of a significant slowing in industry spending and the resulting adverse impact on our results of operations. None of our employees are represented by a labor union. We consider our relations with our employees to be good and we have experienced no work stoppages to date. Competition for skilled personnel in our industry remains strong and our future depends, in part on our ability to attract and retain a skilled workforce and key personnel. We cannot assure you that we will be successful in retaining key personnel or that we will be able to attract and retain skilled workers in the future.

Geographic Information

        A summary of domestic and international financial data is set forth in Note 12 to the Consolidated Financial Statements in Item 8, which is incorporated herein by reference. A discussion of factors potentially affecting our domestic and foreign operations is set forth in "Management's Discussion and Analysis of Financial Condition and Results of Operations—Additional Risk Factors that Could Affect our Operating Results and the Market Price of our Stock," in Item 7, which is incorporated herein by reference.

Available Information

        Our Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and amendments to reports filed pursuant to Sections 13(a) and 15(d) of the Securities and Exchange Act of 1934, as amended, are available on our website at www.tutsystems.com, when such reports are available on the Securities and Exchange Commission website.

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ITEM 2.    PROPERTIES

        As a result of our November 2002 acquisition of VTC, our executive and principal administrative and engineering facility totaling approximately 22,450 square feet is located in Lake Oswego, Oregon. We also have a facility, totaling approximately 17,000 square feet, located in Pleasanton, California. The lease for the Lake Oswego facility expires in July 2005, and the lease for the Pleasanton facility expires in September 2004. In addition, we have a product staging and warehouse facility totaling approximately 7,500 square feet in Cary, Illinois. The lease for this facility expires in July 2004. We have one minor facility in the United Kingdom that is leased month-to-month. Selling, marketing, operational and research and development activities are conducted at all of our facilities. We believe that our facilities will be adequate to meet our requirements for the foreseeable future and that suitable additional or substitute space will be available as needed.

ITEM 3.    LEGAL PROCEEDINGS

        Beginning July 12, 2001, nine putative stockholder class action lawsuits were filed in the United States District Court for the Northern District of California against us and certain of our current and former officers and directors. The complaints were filed on behalf of a purported class of people who purchased our stock during the period between July 20, 2000 and January 31, 2001, seeking unspecified damages. The complaints allege that we and certain of our current and former officers and directors made false and misleading statements about our business during the putative class period. Specifically, the complaints allege violations of Section 10(b) and 20(a) of the Securities Exchange Act of 1934, as amended. The complaints have been consolidated under the name In re Tut Systems, Inc. Securities Litigation, Master File No. C-01-2659-CW. Lead plaintiffs and lead counsel for plaintiffs have been appointed. Plaintiffs filed a consolidated class action complaint on February 4, 2002. Defendants filed a Motion to Dismiss on March 29, 2002. On August 15, 2002, the court granted in part and denied in part the Motion to Dismiss. On September 23, 2002, plaintiffs filed an amended complaint. Defendants filed a Motion to Dismiss the amended complaint, and on August 6, 2003 the court granted in part that Motion. On September 24, 2003, defendants answered the remaining allegations of the amended complaint. On September 24, 2003, defendants reached a settlement of the suit. We have agreed to pay $10 million to settle the suit. This amount was paid by our insurance company in January 2004. The settlement includes a release of all defendants. Because the settlement is subject to court approval, there is no guarantee the settlement will become final.

        On March 19, 2003, Chesky Lefkowitz, one of our stockholders, filed a derivative complaint entitled Lefkowitz v. D'Auria, et al., No. RG03087467, in the Superior Court of the State of California, County of Alameda, against certain of our current and former officers and directors. The complaint alleges causes of action for breach of fiduciary duty, gross negligence, breach of contract, unjust enrichment and improper insider stock trading, based on the same factual allegations contained in the suit. The complaint seeks unspecified damages against the individual defendants on our behalf, equitable relief, and attorneys' fees. On May 21, 2003, we and the individual defendants filed separate demurrers to the complaint. We and the individual defendants thereafter reached a settlement of the derivative action. The settlement involves our adoption of certain corporate governance measures and payment of attorneys' fees and expenses to the derivative plaintiff's counsel, which will be paid by our insurance company. The settlement includes a release of us and the individual defendants. The settlement was approved by the court on January 12, 2004.

        On October 30, 2001, we and certain of our current and former officers and directors were named as defendants in Whalen v. Tut Systems, Inc. et al., Case No. 01-CV-9563, a purported securities class action lawsuit filed in the United States District Court for the Southern District of New York. An amended complaint was filed on December 5, 2001. A consolidated amended complaint was filed on April 19, 2002. The consolidated amended complaint asserts that the prospectuses from the Company's January 29, 1999 initial public offering and its March 23, 2000 secondary offering failed to disclose

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certain alleged actions by the underwriters for the offerings. The complaint alleges claims against us and certain of our current and former officers and directors under Section 11 of the Securities Act of 1933, as amended, and under Section 10(b) and Rule 10b-5 of the Securities Exchange Act of 1934, as amended, and alleges claims against certain of our current and former officers and directors under Sections 15 and 20(a) of the 1933 Act. The complaints also name as defendants the underwriters for our initial public offering and secondary offering. The complaints against the individual defendants-namely, Nelson Caldwell, Salvatore D'Auria and Matthew Taylor-have been dismissed without prejudice by an October 9, 2002, Order of the Court, which approved and ordered the dismissals pursuant to the parties' October 1, 2002, Stipulation of Dismissal. On February 19, 2003, the court issued an Opinion and Order denying our motion to dismiss. The Company's Board recently approved a tentative settlement proposal from the plaintiffs. The settlement is subject to a number of conditions, including court approval of the proposed settling parties and the Court. If the settlement does not occur, and the litigation against the Company continues, the Company believes it has meritorious defenses to the allegations in the complaint and intends to defend the case vigorously. The Company believes its insurance coverage is adequate to offset the proposed settlement. Nevertheless, an unfavorable resolution of this litigation could have a material adverse effect on the Company's business, results of operations, financial condition and cash flows.

        We are subject to other legal proceedings, claims and litigation arising in the ordinary course of business. Our management does not expect that the ultimate costs to resolve these matters will have a material adverse effect on our consolidated financial position, results of operations, or cash flows.

ITEM 4.    SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

        None.

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PART II

ITEM 5.    MARKET FOR THE REGISTRANT'S COMMON STOCK AND RELATED STOCKHOLDER MATTERS

        Our common stock has been quoted on the Nasdaq National Market under the symbol "TUTS" since our initial public offering in January 1999. The following table sets forth, for the periods indicated, the low and high closing sales prices per share of the common stock by quarter for 2002 and 2003, as reported on The Nasdaq National Market.

        On January 26, 2004, the last reported sale price of our common stock on the Nasdaq National Market was $7.00 per share. As of January 26, 2004, there were 20,276,454 shares of our common stock outstanding and approximately 294 holders of record of our common stock.

        We have not paid dividends in the past and we intend to retain earnings, if any, and will not pay dividends in the foreseeable future. Any future determination to pay dividends will be at the discretion of the board of directors and will be dependent upon our financial condition, results of operations, capital requirements, general business conditions and such other factors as our board of directors may deem relevant.

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ITEM 6.    SELECTED CONSOLIDATED FINANCIAL DATA

        The following table presents our selected consolidated financial data for, and as of the end of, each of the periods indicated. The selected consolidated financial data for, and as of the end of, the fiscal years ended December 31, 1999, 2000, 2001, 2002 and 2003 are derived from our audited consolidated financial statements. The selected consolidated financial data are not necessarily indicative of the results that may be expected for any future period. The selected consolidated financial data should be read in conjunction with "Management's Discussion and Analysis of Financial Condition and Results of Operations" and our consolidated financial statements and notes included elsewhere in this prospectus.

(1)

Includes reserves for excess and obsolete inventory of $7,125.

(2)

Includes reserves for excess and obsolete inventory of $34,237.

(3)

Includes provision for loss on purchase commitments and abandoned products of $27,223.

(4)

Includes provision for doubtful accounts of $22,546.

(5)

Includes effect of acquisition of VideoTele.com on November 7, 2002.

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ITEM 7.    MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

        The section entitled "Management's Discussion and Analysis of Financial Condition and Results of Operations" set forth below contains "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. When used herein, the words "anticipates," "believes," "continue," "could," "estimates," "expects," "intends," "may," "plans," "seeks," "should," "will" or the negative of these terms or similar expressions are generally intended to identify forward-looking statements. Because these forward-looking statements involve risks and uncertainties, there are important factors that could cause actual results to differ materially from those expressed or implied by these forward-looking statements. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof. These forward-looking statements reflect current views of our management with respect to future events and are subject to these and other risks, uncertainties and assumptions. As a result, actual results may differ materially from the forward-looking statements contained herein. All subsequent written and oral forward-looking statements attributable to us or persons acting on our behalf are expressly qualified in their entirety by this paragraph.

Overview

Our Business

        We design, develop and sell video content processing systems that optimize the provisioning of broadcast digital TV services across telephone company networks. We also design, develop and sell digital video trunking systems for applications across TV broadcast, government and education facilities and private broadband network systems that enable the delivery of broadband data services over existing copper networks within hotels and private campus facilities.

Our History

        Prior to November 2002, most of our sales were derived from our private broadband network systems. In 2000 and 2001 we acquired three companies (FreeGate Corporation, Xstreamis Limited and ActiveTelco, Inc.) and the assets from two other companies (OneWorld Systems, Inc. and ViaGate Technologies, Inc.) in order to expand our sales of private broadband network systems. However, the significant downturn in the world economy in general, and the telecommunications market in particular, beginning in late 2000 had a severe and sustained adverse effect on our business, financial condition and results of operations. Our sales of private broadband network systems decreased substantially beginning in 2001, which required us to take a number of restructuring efforts and incur significant impairment and other charges in order to realign our cost structure in light of the economic environment. For the period 2001 through 2002, we incurred an aggregate of $32.6 million in intangible asset impairment charges and $11.5 million in restructuring charges. In 2003, sales from our private broadband network systems stabilized, as we began to experience an improvement in sales of private broadband network systems to the hospitality industry.

        With our November 2002 acquisition of Tektronix's subsidiary VTC, we extended our product offerings to include video content processing and video trunking systems. The acquisition of VTC resulted in significant changes in our business, including: (1) changes in our organizational structure and employee staffing; (2) relocation of our administrative offices and a significant portion of our operations from Pleasanton, California to Lake Oswego, Oregon, the prior headquarters of VTC; (3) an expansion of our sales and marketing efforts to include VTC products; and (4) a reprioritization of our research and development efforts to focus on products that we acquired in our acquisition of VTC. With our acquisition of VTC, sales of video content processing systems and digital video trunking

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systems now represent a majority of our total revenues and will provide most of our growth opportunities in the foreseeable future.

        We earn revenue primarily by selling video content processing systems both directly and through resellers to telecommunications service providers. We also earn revenue by selling video trunking systems to TV broadcasters, government agencies and educational institutions, and by selling private broadband network systems directly and through distributors to the hospitality industry and to owners of private multi-tenant campus facilities.

        Prior to our acquisition of VTC, international sales represented 56.3% and 43.0% of our total sales in 2001 and 2002, respectively. Since our acquisition of VTC, international sales have represented a smaller percentage of our overall business relative to prior years, though international sales are still a material portion of our total sales. In 2003, international sales represented 18.4% of our total sales.

        The market for our products is intensely competitive, and we expect that this market will continue to become more competitive in the future. As we begin to target larger telco customers, we expect to compete with larger public companies, including Harmonic, Motorola and Tandberg Television. Our immediate competitors in the digital TV headend markets are primarily small private companies that are focused on a more narrow product line than ours and thereby may be able to devote substantially more targeted resources to developing and marketing new products than we can. In addition, these companies may become targets for acquisition by larger companies, in which case we would face competitors that would have substantially greater name recognition and technical, financial and marketing resources than we do.

Definitions for Discussion of Results of Operations

        Our discussion of our results of operations focuses on the following items from our income statement:

        Total revenues consists of product sales, and license and royalty fees. Product revenue consists of sales of our digital TV headend, video trunking and private broadband network systems. License and royalty fees consist of non-refundable license fees and royalties received by us for products sold by our licensees. Since our acquisition of VTC, a large part of our quarterly revenue has been associated with the sale of digital TV headends. Furthermore, each individual headend sale has represented a significant portion of our revenue for each quarter. If we were to sell even one less system than our forecasted number of headend sales per quarter, our quarterly revenue would be materially impacted. As we did not enter into any new license or royalty agreements during 2001, 2002 or 2003, we expect that our license and royalty revenue will decrease in the foreseeable future.

        Cost of goods sold (COGS) consists of costs related to raw materials, contract manufacturing, personnel, overhead, test and quality assurance for products, and the cost of licensed technology included in our products. Raw materials, contract manufacturing and licensed technology are the principal elements of COGS and vary directly with product sales.

        Sales and marketing expense consists primarily of selling and marketin