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

FORM 10-K

FOR ANNUAL AND TRANSITION REPORTS PURSUANT TO
SECTIONS 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                               to                              .

Commission File No. 000-20698

BROOKTROUT, INC.
(Exact Name of Registrant as Specified in Its Charter)

250 FIRST AVENUE, NEEDHAM, MASSACHUSETTS 02494
(Address of Principal Executive Offices) (Zip Code)

Registrant's telephone number, including area code: (781) 449-4100

Securities registered pursuant to Section 12(b) of the Act: None

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

        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

        On June 30, 2003 (the last business day of the registrant's most recently completed second fiscal quarter), the aggregate market value of the voting and non-voting common equity held by nonaffiliates of the registrant was approximately $84.5 million, based on the last reported sale price of $7.88 of the registrant's common stock on the Nasdaq National Market.

        As of January 31, 2004, 12,756,536 shares of common stock, $.01 par value per share, were outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

        Portions of our definitive Proxy Statement relating to the Annual Meeting of Stockholders to be held on May 5, 2004 will be incorporated into Part III, Items 10, 11, 12, 13 and 14, of this Form 10-K. A copy of the Proxy Statement will be available at no cost from our Investor Relations department at (781) 449-4100.

BROOKTROUT, INC.
ANNUAL REPORT ON FORM 10-K
YEAR ENDED DECEMBER 31, 2003

TABLE OF CONTENTS

        "Brooktrout," "Brooktrout Technology," "Netaccess," "RealBLOCs," "RealCT," "TruFax" and "TRxStream" are our registered trademarks, and "New Network," "NS301," "NS700," "Partner Access Network Program," "TR2020," "TR1034," "TR1000," "TR114," and "Vantage" are our trademarks. This report also includes trademarks, service marks and trade names of other companies.

PART I

Item 1. Business

Overview

        We develop software and hardware platforms that original equipment manufacturers, or OEMs, developers and corporate information technology managers build into their communications systems. Customers incorporate our products into applications, systems and services that allow voice, fax and data to be distributed over both Internet protocol, or IP, packet-based networks, which we refer to as the New Network, and the traditional circuit-switched telephone network. We supply products for media processing, network interface, call control and signal processing, including protocols that allow Internet and traditional telephony systems to communicate. Our strategy is to partner with our customers and collaborate closely with them to accelerate their delivery of new applications and services, help increase their existing business, and expand into new markets.

        In the 1980s, we delivered technology capable of digitally recording, storing and playing back voice messages using a computer connected to the telephone. In the 1990s, we introduced multi-channel fax boards, we combined fax and voice processing on a single board, and we provided fax application development tools under UNIX and Microsoft Windows NT. We received U.S. patents on fax-on-demand document retrieval and the use of direct inward dialing telephone service with fax message systems. Since 2000, we have introduced new, open systems products in support of market growth areas such as automatic speech recognition, unified communications and packetized voice, and we received a U.S. patent for voice detection in audio signals to aid in speech recognition applications.

        The evolution of the world's communications systems has created important market opportunities for us. One opportunity involves core technologies and platforms that are primarily used in Today's Network—business premise products such as local area network fax and voice mail. The second opportunity is what we refer to as the New Network—the convergence of the traditional telephone network and the Internet. New Network opportunities enable voice, fax and data information to be distributed using IP-based packet networks, such as the Internet, for portions of the transmission or to be distributed using the traditional circuit-switched telephone network. Effective electronic communication over the New Network is dependent upon network infrastructure technology that weaves together the many disparate systems and applications that already exist with the new and emerging technologies. We develop the core technology that hooks the telephone network to the data network in two key markets: voice and speech, and fax. Network interfaces, call control and signal processing are critical to the proper functioning of any communications system. These capabilities span our entire product line and are the intelligence by which telephone calls are established, managed and terminated.

        We were incorporated in Massachusetts in 1984 and we changed our name from Brooktrout Technology, Inc. to Brooktrout, Inc. in 1999. Prior to February 8, 2001, we were organized and reported the results of our operations in three operating segments, Brooktrout Technology, Brooktrout Software, and Interspeed. On February 8, 2001, our Board of Directors adopted formal plans to discontinue our Brooktrout Software and Interspeed segments. We have accounted for these businesses as discontinued operations. See Note 2 to the consolidated financial statements included elsewhere in this report. Except where indicated, the information presented in this report pertains to our continuing operations.

        We maintain a website with the address www.brooktrout.com/investor. We are not including the information contained on our website as a part of, or incorporating it by reference into, this report. We make available free of charge through our website our annual reports on Form 10-K, quarterly reports on Form 10-Q and current reports on Form 8-K, and amendments to those reports, as soon as reasonably practicable after we electronically file them with the SEC.

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Principal Markets and Products

Markets

        Our products provide enabling technology in two key markets—voice and speech, and fax.

Voice and Speech

        Speech technology is rapidly emerging as the user interface of choice for advanced communications applications. Interactive speech applications allow users to instantly access information and conduct transactions from any landline or wireless phone, or other handheld device. Speech technology is lowering costs, improving customer satisfaction, and driving the development of applications that deliver innovative value-added services to a growing number of mobile customers. Today's end users demand speech systems that are accurate, fast and easy to use. Choosing the right speech platform can make a difference in the performance and scalability of speech applications.

        Our voice processing products support a wide range of capabilities, from simple 2-channel, or port, voice messaging boards, to large scale, high-density media servers. Our advanced echo cancellation and voice-activity detection technology improve the performance, cost, and scalability of speech recognition systems. Our voice product offerings include products that operate in the traditional telephone network, products that operate in the packet-based network, and products that operate in both such networks.

        As a provider of open systems enabling technology, our products are only one component of an overall solution. We rely on the strength of our partners to ensure that together we provide quality voice and speech solutions. We continue to work closely with the leading providers of speech technology and development tools to ensure interoperability and optimal performance so that applications developed using our products can be developed with ease and deployed with confidence.

        Voice eXtensible Markup Language, or VoiceXML, and Speech Application Language Tags, or SALT, are emerging software standards intended to address the unique user-interface requirements of interactive, speech-enabled applications. These two programming languages are the speech equivalent of HyperText Markup Language, or HTML, which is the authoring software language used on the Internet's World Wide Web. As extensions of standard Web technology, they leverage the existing Web infrastructure, applications, skilled developers and tools, greatly simplifying the development and deployment of speech-enabled applications. Brooktrout is actively involved in supporting current and emerging industry standards. Our speech boards support our partners' VoiceXML and SALT browsers, transparently handling media and telephony signaling tasks in these environments.

Fax

        Messaging systems are growing in scope and sophistication as companies exploit the collaborative nature of messaging to aid employee communication and productivity. Brooktrout keeps pace with the continuing advancement of communications needs by investing in fax technology to help build the next generation of messaging and communication systems.

        We are the worldwide market leader of intelligent fax boards. The market for fax technology is growing due to continued e-mail usage and the desire to connect faxes with e-mail. We offer open, scalable platforms that easily integrate with e-mail, enterprise resource planning, customer relationship management, and document management and imaging applications to independent software vendors and fax application system developers.

        We provide technology for systems of all sizes, from small one-port systems to multiple T1 and E1 spans. Our boards provide a wide range of processing capabilities for network and production fax applications such as purchase orders, invoices, loan applications and approvals, and financial reports.

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They are built into products to enable desktop fax users to send and receive documents securely and confidentially, as well as to access faxes over the Internet.

Products

Voice and Speech Platforms

        TR1000 Media Resource Platform is a standards-based, board-level voice and fax processing platform designed to support speech, interactive voice response, or IVR, messaging, and conferencing and fax applications. Ranging from two to 60 channels per board, the performance and flexibility of this feature-rich media platform allows systems to scale in density and functionality to meet the current and evolving needs of advanced enterprise and service provider applications. The TR1000 platform integrates digital signal processors, or DSPs, embedded microprocessors, analog, basic rate interface, or BRI, T1/E1 interfaces, primary rate interfaces, or PRI, and software within a common hardware and software architecture, and is specifically designed to support multiple, scalable services and a seamless migration path within the entire product family. Applications supported by the TR1000 platform include pre-paid/debit calling card systems, announcement systems, conferencing, media servers, speech solutions, and unified messaging and communications.

        TR2020 PCI Platform is an open systems platform for voice over packet applications. This board performs a number of key functions including voice compression, as well as fax and data relay. The TR2020 platform includes on-board packetization, T1/E1 telephony interfaces, echo cancellation, approvable Network Equipment Building Standards, or NEBS, compliance and a growing list of U.S. and international telephony approvals. Applications supported by the TR2020 include voice over IP gateways, wireless-to-IP gateways, voice over cable, Internet call waiting, click to talk, audio/web conferencing, IP-private branch exchange and IP-enabled call centers.

        RealBLOCs DR-A Advanced Call Recording Platform is an open systems platform that is scaleable and feature-optimized to deliver accuracy and clarity for call recording applications. The RealBLOCs DR-A platform can be used to build call recording platforms from eight ports to over 264 ports per system. The RealBLOCs DR-A platform is comprised of a peripheral component interconnect, or PCI, baseboard with analog passive tap interfaces and a plug-in digital signal processor module with call recording firmware. Applications supported include call logging and quality monitoring.

        Vantage PCI Voice Processing Platform is a flexible and robust platform, providing developers and system integrators with a single-board solution for low- to mid-density analog communications applications. The Vantage PCI platform incorporates voice processing algorithms that implement essential features such as audio compression, playback control, touchtone detection and generation, and call progress monitoring. Applications supported by the Vantage PCI platform include voice messaging, unified messaging, automated attendant, digital recording, interactive voice response, and telemarketing.

        RDSP Voice Processing Platform is a robust platform for computer telephony applications. The RDSP platform, which ranges from two to 24 ports per board features voice processing algorithms that implement essential features such as audio compression, playback control, touchtone detection and generation, and call progress monitoring, which are needed in high-quality telephony applications. Applications supported include messaging, digital recording, interactive voice response, and outbound telemarketing.

Fax Platforms

        TR1034 V.34 Fax Platform is our latest generation intelligent fax board, offering enterprise customers a line of 33.6Kbps fax boards with high-performance fax capabilities. The TR1034 platform is a single slot fax card that supports the V.34 standard, delivering fast 33.6Kbps fax transmission speeds,

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with two to 30 fax channels per board, and features analog, BRI or T1/E1 interfaces. For customers, this delivers significant transmission cost savings, increased service capacity, and full interoperability with the growing installed base of V.34 fax machines. Applications supported include network, broadcast and production fax, fax on demand, business process automation, and customer relationship management.

        TR114 PCI V.17 Fax Platform is designed specifically for network fax server applications. The TR114 PCI platform has a library of communication techniques that identify and adapt to the various implementations of real-world fax machines and line conditions that provides high compatibility, high connectivity rates and high overall transmission speeds. The TR114 PCI platform ranges in density from one to four channels on a single board, and up to 24 channels per chassis. The TR114 PCI boards are also certified to support the Microsoft shared fax capabilities of Microsoft Windows Server 2003. Applications supported include LAN/network fax, broadcast fax, production fax, and unified messaging.

        TruFax Platform offers small- to medium-sized businesses and departmental workgroups dependable fax capabilities at an economical price for low volume fax traffic. Unlike Class 1 and Class 2 fax modems, TruFax's advanced fax algorithms and dedicated fax processing components deliver the performance that enterprise fax applications require. The TruFax intelligent fax boards are also certified to support the Microsoft shared fax capabilities of Microsoft Windows Server 2003. Applications supported include network and low-volume broadcast and production fax.

Network Interface/Signaling/Call Control Platforms

        NS301 Platform is an open systems platform for carrier grade network interface and packet processing applications. The NS301 is available in compactPCI, or cPCI, with either dual, quad or octal T1/E1 network interfaces with optional Ethernet and up to 256 HDLC controllers on board. The NS301 provides support for call control, packet processing and signal processing as well as on-board packet manipulation through our unique packet relay feature. This carrier grade hardware platform speeds system development and reduces time to market by providing a flexible and low-level application programming interface, or API, and growing list of U.S. and international telephony approvals. Applications supported include call processing systems, wireless infrastructure elements, wireless data network elements, signaling gateways and monitoring and surveillance systems.

        NS700 Platform provides one of the industry's most robust SS7 feature sets. The PCI board offers four E1 or T1 interfaces, whereas the cPCI board offers eight T1 or E1 interface ports. Each has a high-performance on-board processor to off-load the host from lower layer requirements. It allows developers to leverage the capabilities of the SS7 network and develop carrier-grade applications for SS7 circuit-switched call control, SS7/IP convergence, GSM MAP SMS, CDMA IS-41, and INAP Intelligent Network devices. Applications supported include calling card platforms, welcome roamer, short message service centers, and personal numbering.

        RealBLOCs ATSI Platform is a series of analog trunk and station interface cards. These boards are offered in varying density combinations with up to 24 ports on a single board to allow for cost-effective installations of communication systems. An onboard H.100 interface offers the flexibility to interoperate with other boards to create comprehensive and scalable solutions. Applications supported include call routing, call logging, call monitoring, private communications exchange, quality management, and unified communications solutions.

Development Software/Application Programming Interfaces

        Bfv is a fax and voice application programming interface that provides developers with a complete C language library of telephony, fax, and voice function calls, as well as fax utilities, sample applications, and debugging tools.

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        TDAPI is a powerful C language API with an extensive range of protocol modules or "building blocks". TDAPI provides developers with low-level access to the hardware configuration, switching and call control services offered by our NS700 PCI and cPCI network interface boards.

        RealCT Direct offers developers direct, low-level control of telephony and voice processing functions to create full-featured computer telephony applications that minimize code space, execute faster and implement only the needed subset of the driver's capabilities.

New Products; Research and Development

        The market for communications products is generally characterized by rapid technological change, changes in customer requirements, frequent new product introductions and enhancements, and emerging industry standards. We focus significant resources on improving our products in response to changes in operating systems, application software, computer and telephony hardware, networking software, programming tools, and computer language technology. We also direct significant resources to the development of new products and next generation versions of our current products. As technologies continue to evolve, there has also been a growing shift in the communications market to focus on the software component of our product offerings. While we have delivered both hardware and software as part of our product line since our company began, we are beginning to emphasize the value of our software for our customers and partners. Our research and development expenses totaled $18.5 million, or 25% of total revenue, in 2003, $20.7 million, or 28% of total revenue, in 2002, and $21.5 million, or 27% of total revenue, in 2001. We believe significant investments in product development are required to remain competitive. As a consequence, we intend to continue to invest a significant dollar amount on product development.

Warranties

        Our hardware products are covered by a limited warranty against defects in materials and workmanship. In 2000, we extended the warranty on our generally available network interface and signal processing hardware products to five years from the date of purchase from us. Products purchased on or after January 1, 2000 are covered under this new warranty. Many of our competitors have shorter warranties. We have also provided, from time to time, shorter warranties for certain products and to certain customers, as well as extended warranties to certain customers under contractual agreements or for additional consideration.

Backlog

        At December 31, 2003, our backlog of firm orders was $4.1 million, compared with $3.1 million at December 31, 2002. All of the backlog is expected to be shipped before the end of 2004. We regard all orders as firm orders. Because of the possibility of customer changes in delivery schedules or of cancellation of orders, our backlog as of any particular date may not be indicative of actual sales for any particular future period. The period of time between placement of an order and delivery of the product varies from one day for certain TRxStream Series products to nine months for certain OEM systems products.

Manufacturing and Quality

        Our manufacturing operations consist primarily of final assembly and testing of components, subsystems and systems. We test our products at various stages in the manufacturing process. Prior to shipment, each product undergoes a final load and/or functional test either by our subcontractors or by us at our own facilities.

        We believe that we have a readily available supply of raw materials for all of our significant products from a number of sources. We do not anticipate any difficulties in obtaining the raw materials

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that will be required for our manufacturing activities in 2004. We use independent manufacturers to perform printed circuit board assembly and testing. We believe that we generally have good relationships with our subcontractors and have generally experienced timely delivery of products and satisfactory quality with respect to products manufactured by our subcontractors. Our Needham, Massachusetts, Los Gatos, California and Salem, New Hampshire facilities have achieved ISO 9001:2000 certification.

Distribution, Sales, Marketing and Support

        We sell our products to system vendors, service providers, OEMs, and value-added resellers, or VARs, both domestically and internationally through a direct sales force and a two-tiered distribution system. The two-tiered distribution arrangement is with Tech Data Corporation, a networking supplier, and Ingram Micro, a wholesale distributor of computer technology products and services.

        We have established international sales offices in Belgium, Japan and the United Kingdom. International sales accounted for approximately 22% of our total revenue in both 2003 and 2002, and 20% of our total revenue in 2001.

        Most countries require technical approvals from their communications regulatory agencies for products that operate in conjunction with the local telephone system. Obtaining these approvals is generally a prerequisite for sales in a given jurisdiction. Obtaining the requisite approvals may require from two months to a year or more depending on the product and the jurisdiction. Our products have received approvals from agencies in more than 25 countries.

        We ordinarily sell our products on the basis of purchase orders received from customers. From time to time, we have entered into contracts with certain of our customers, which agreements set forth the terms and conditions for sales. These agreements generally do not establish any long-term fixed purchase or supply commitments for either party.

Service Providers and OEMs

        Service providers of enhanced communications services develop, or purchase from developers, large, complex systems incorporating our products to deliver electronic communications applications. These systems typically have long development cycles and result in periodic deployments of large systems. OEMs design, manufacture, and market electronic communications systems that incorporate our products. OEMs generally have long product design and development processes that precede the release of products. Making sales to both of these types of customers can be a complex and time-consuming process that is often focused on technical requirements.

VARs and Enterprise Customers

        VARs typically purchase our products for resale to an end-user enterprise customer together with application software developed by the VAR or purchased from an independent software vendor. We have established a network of authorized resellers. We employ direct sales people to recruit, train and assist VARs. We also use a two-tiered distribution system for some of our fax, voice and network interface products, utilizing national distributors who then sell to VARs. In the two-tiered distribution system, we do not recognize revenue until the products are sold by the distributor.

Dependency on Major Customers

        Sales to Captaris, Inc. represented 19% of our total revenue in 2003, 15% of our total revenue in 2002, and 12% of our total revenue in 2001. No other customers represented more than 10% of our total revenue in 2003 and 2002.

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Partner Access Network Program

        Our Partner Access Network Program was established to provide technical, marketing and business benefits to help our customers and partners quickly develop new applications and services, expand into new markets and, ultimately, grow their businesses. The program includes financial assistance for the porting of approved applications, access to lab facilities worldwide, sales leads, technical training and support, and co-op funded marketing support.

Technical Support

        We back our products with engineering-level support. Many of our technical support staff members hold bachelor's degrees in electrical engineering or computer science. Staff members place the highest priority on providing timely, accurate information, as well as advice on how to take advantage of our sophisticated product line. Our technical support personnel have been a source of product improvements and new features and functions resulting from their close working relationships with customers. Our technical support activities represent an integral element of our marketing strategy.

Patents, Licenses and Trademarks

        We depend on our ability to develop and maintain the proprietary aspects of our technology. To protect our proprietary technology, we rely primarily on a combination of contractual provisions, confidentiality procedures, trade secrets, and patent, copyright and trademark laws.

        From time to time, we seek patent protection for inventions and developments made by our personnel that are incorporated into our products or that otherwise fall within our fields of interest. For example, in 2001, we were awarded a U.S. patent for voice detection in audio signals, which aids in speech recognition applications. While patents are an important means by which we seek to protect our intellectual property, no particular patent, or related group of patents, is so important that its loss would significantly affect our operations.

        We have acquired licenses under certain third-party patents covering aspects of voice processing and voice transcoding technology, and licenses from third parties for some of the software used in certain of our voice and fax products. We pay royalties under these licenses with respect to our sales of certain products. The licenses generally extend for the life of the patent in question (in the case of patents) or in perpetuity (in the case of software), and are subject to termination only in the event of a breach. Royalties constitute a percentage of sales of particular products or product elements, or a fixed amount per unit of hardware or software distributed, and do not generally account for a material part of our cost of product sold.

        We seek to protect our software, firmware, documentation and other written materials under copyright laws. Because on-board and downloadable firmware represents an important element of the value of our hardware products, we believe that we obtain significant protection for our proprietary interest in our hardware products, as well as our software products, from copyright laws. Certain design features, including application-specific integrated circuits, software and firmware, receive some protection under trade secret laws. We generally require that each of our employees executes a proprietary information agreement designed to protect our trade secrets, inventions created in the course of employment with us and other Brooktrout proprietary information. There can be no assurance, however, that patent, copyright and trade secret protection will be sufficient to prevent competitors from developing software and other technology similar to the software and other technology upon which we rely for a significant portion of our revenue. In addition, we have periodically received, and may receive in the future, communications from third parties asserting patent rights with respect to certain of our products and features.

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Competition

        The market for telecommunications equipment is highly competitive. In addition to current competitors, there is always the potential for new entrants into our markets by other companies, including our customers and suppliers. We believe that the principal competitive factors affecting the market for our products include product functionality and features, product quality, performance and price, ease of product integration, and quality of customer support services. In addition, many of our customers, including the large OEMs on whom we focus a significant portion of our sales and marketing efforts, have the technical and financial ability to design and produce components replicating or improving on the functionality of most of our products. These customers often consider in-house development of technologies and products as an alternative to doing business with us. The relative importance of each of these factors depends upon the specific customer environment. Although we believe that our products currently compete favorably with respect to such factors, there can be no assurance that we can maintain our competitive position against current and potential competitors.

        Many of our current and potential competitors have longer operating histories, significantly greater financial, technical, product development and marketing resources, greater name recognition and larger customer bases than we do. Though our addressable market in the overall telecommunications market is characterized by several large competitors, the rest of the market is fairly fragmented and many of our current and potential competitors are smaller companies. These smaller companies generally have significantly less financial, technical, product development and marketing resources, lesser name recognition and smaller customer bases, but these smaller companies may also have an ability to respond more quickly to changes in the market or technology. Our present or future competitors may be able to develop products comparable or superior to those developed by us, adapt more quickly to new technologies, evolving industry trends or customer requirements, or devote greater resources to the development, promotion and licensing of their products than we can. Accordingly, there can be no assurance that competition will not intensify or that we will be able to compete effectively in our market.

        We have faced, and we expect that we will continue to face, increasing pricing pressures from our current competitors and new market entrants. Our competitors may engage in pricing practices that cause us to reduce the selling prices of our products. To offset declining selling prices, we believe that we must successfully develop and introduce, on a timely basis, new products or products that incorporate new features that can be sold at gross profits comparable to those of existing products. To the extent that such new products are not developed in a timely manner, do not achieve customer acceptance, or do not generate comparable gross profits, our profitability may decline.

Employees

        As of December 31, 2003, we had 317 full-time employees, of whom 122 were engaged in engineering and product development, 108 in sales, marketing and technical support, 49 in administration, and 38 in manufacturing. None of our employees are represented by a labor union and we believe our relationships with our employees are good.

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Executive Officers

        Our executive officers as of March 1, 2004 were as follows:

        Eric R. Giler is a founder and has been President and a director since our inception in 1984. Prior to founding Brooktrout, Mr. Giler worked primarily in the area of technical marketing and sales as a product manager with Teradyne, Inc. and as an applications engineering manager for Intec Corp. Mr. Giler is the former Chairman of the Massachusetts Telecommunications Council and a current board member. He received a Bachelor of Science degree from Carnegie-Mellon University and a Master of Business Administration degree from the Harvard Business School. Mr. Giler serves on the board of Netegrity, Inc., a provider of identity and access management solutions.

        David W. Duehren is a founder and has been Vice President of Research and Development and a director since our inception in 1984. Mr. Duehren is the former chairman of the Telecommunications Industry Association Committee TR29.1, the subcommittee responsible for Group 3 fax enhancements, and also contributes to worldwide International Telecommunications Union—Telephony (ITU-T) and Internet Engineering Task Force (IETF) standards. Mr. Duehren is also a member of the Institute of Electrical Electronic Engineers (IEEE). Mr. Duehren received a Bachelor of Science degree and Master of Science degree in Electrical Engineering from the Massachusetts Institute of Technology.

        Robert C. Leahy has been Vice President of Finance and Operations and Treasurer of Brooktrout since March 1988. Prior to joining us, Mr. Leahy held the position of corporate controller and treasurer for Cambridge Robotics. Mr. Leahy is an active member in the Financial Executive Institute. Mr. Leahy received a Bachelor of Science degree in accounting and a Master of Business Administration degree from Bentley College.

        Heather J. Magliozzi has been Vice President of Corporate Marketing since January 2004. Ms. Magliozzi was Vice President of Marketing from November 2002 to January 2004,Vice President of Corporate Communications from August 1998 to November 2002, Director of Marketing from April 1996 to July 1998, and Marketing Communications Manager from August 1994 to April 1996. Ms. Magliozzi was a Marketing Manager for NEC Technologies from January 1985 to July 1994. Ms. Magliozzi received a Bachelor of Arts degree in English and Communications from Boston College.

        Ronald J. Bleakney has been Senior Vice President of Worldwide Sales since November 2002. Mr. Bleakney directed the North American sales and marketing operations for Surf Communication Solutions, Inc., a provider of software-based access solutions, from August 1999 through June 2002.

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From April 1990 through June 1999, Mr. Bleakney held the positions of Vice President of Sales and Marketing, and Senior Vice President of Sales at NMS Communications Corporation, a provider of communications products and services. Mr. Bleakney received both a B.S.B.A. and a Master of Business Administration degree from Boston College.

        R. Andrew O'Brien has been Vice President of Market and Business Development since January 2004 and prior to this time was Vice President of Business Development since November 2002. From January 2001 to November 2002, Mr. O'Brien was Vice President and General Manager of our New Public Networks Group. Mr. O'Brien was Vice President of Business Development from July 1998 to January 2001, Vice President of Marketing and Business Development from July 1993 to June 1998, and Director of Marketing and Business Development from January 1993 to June 1993. Mr. O'Brien was a consultant with McKinsey & Company, Inc. from September 1986 to January 1993. Mr. O'Brien received a Bachelor of Arts degree from Yale University and a Master of Business Administration degree from the Harvard Business School.

        John W. Ison has been Vice President of Product Management since November 2002. From January 2001 to November 2002, Mr. Ison was Vice President and General Manager of our Enterprise Markets Group. Mr. Ison was Vice President and General Manager of our Voice Technology Division from April 1999 to January 2001. Prior to joining us, Mr. Ison was Vice President of Marketing at Live Picture, Inc., a provider of solutions for delivering images over the Internet, and President and CEO at Newfire, Inc., a provider of web-based software solutions. Mr. Ison received a Bachelor of Science and a Master of Science in Management from the Massachusetts Institute of Technology and a Master of Science in Engineering from Dartmouth College.

        Steven J. Bielagus has been Vice President of Engineering since March 2003. From March 2001 through February 2003, Mr. Bielagus was Vice President of Engineering at Sockeye Networks, Inc., a provider of Internet route optimization products and services. From July 1999 through January 2002, Mr. Bielagus was Senior Vice President Engineering and Operations at IronBridge Networks, Inc. a provider of Internet protocol routers. From August 1998 to June 1999, Mr. Bielagus was Vice President of Engineering at the Pen Computing Group of A.T. Cross Company, which develops pen-based products that facilitate electronic communications. Mr. Bielagus received a Bachelor of Science Degree in Electrical Engineering from the Massachusetts Institute of Technology.

        Jonathan J. Sirota has been a Vice President since January 1994. Mr. Sirota was General Manager of the Data Technology Division of Brooktrout from September 1998 to January 2001. Mr. Sirota was Vice President of Engineering from January 1994 to August 1998. Mr. Sirota was Senior Vice President of Engineering and Operations for ERGO Computing, Inc. from March 1989 to January 1994. Mr. Sirota received a Bachelor of Science degree in Electrical Engineering from Rensselaer Polytechnic Institute and a Master of Science degree in Electrical Engineering from Massachusetts Institute of Technology.

        No executive officer is related by blood, marriage or adoption to any other executive officer or director.

Item 2. Properties

        We lease facilities in Needham, Massachusetts, in Salem, New Hampshire, and in Los Gatos, California. In Needham, Massachusetts, we lease three facilities: a 31,000 square foot manufacturing facility; a 38,000 square foot facility that accommodates engineering, sales and marketing; and a 22,000 square foot office that houses corporate headquarters. Two of the Needham, Massachusetts facilities are leased until 2006, and one until 2005. In Los Gatos, California, we lease an office of approximately 33,000 square feet for engineering, sales, marketing and administration. This lease expires in 2006. In Salem, New Hampshire, we lease a 26,000 square foot facility for engineering, manufacturing, sales,

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marketing and administrative operations. This lease expires in 2006. In addition, we have guaranteed the lease payments associated with certain leases for office facilities occupied by former subsidiaries.

        We also maintain operating leases and office space for sales and support functions in Florida, Georgia, Illinois, North Carolina, Texas, Canada, Belgium, Japan and the United Kingdom.

        We believe that our present facilities are adequate for our current needs and that suitable additional space will be available as needed.

Item 3. Legal Proceedings

        None.

Item 4. Submission of Matters to a Vote of Security Holders

        Not applicable.

PART II

Item 5. Market For Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

        Our common stock is quoted on the Nasdaq National Market under the symbol "BRKT." The following table shows the high and low sales prices per share of the common stock, as reported on the Nasdaq National Market, for the periods indicated:

        We have never paid cash dividends on our common stock. We do not anticipate paying cash dividends in the foreseeable future. On March 1, 2004, there were 445 holders of record of our common stock and the last reported sale price of the common stock on the Nasdaq National Market was $20.15 per share.

        Information regarding our equity compensation plans is included in Notes 1 and 11 of our consolidated financial statements.

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Item 6. Selected Financial Data

        The selected financial data presented below is derived from our consolidated financial statements. These financial statements exclude the results of certain businesses that were disposed of and have been accounted for as discontinued operations. See Note 2 to the consolidated financial statements. The following selected consolidated financial data should be read in conjunction with "Management's Discussion and Analysis of Financial Condition and Results of Operations" and the consolidated financial statements and notes thereto included elsewhere in this report.

(1)

In 2000, we acquired rights to certain in-process voice over broadband STS-1 technology for $2.6 million.

(2)

In 2003, net gain on investment activity represents a gain of $0.5 million from the sale of 0.1 million shares of Network Engines, Inc. common stock. In 2001, net loss on investment activity represents a $3.9 million permanent reduction in the carrying value of our equity interest in Sonexis, Inc. and a loss of approximately $1.0 million on the sale of a second cost basis investment. In 1999, net gain on investment activity represents: a gain of $19.9 million, net of offering related costs, on our sale of 1.9 million shares of Interspeed common stock in Interspeed's initial public offering; a gain of $2.5 million from the sale of marketable debt securities; and a loss of $0.7 million, representing the book value of a separate investment that was written off in 1999.

(3)

In 2001 and 2000, equity in loss of affiliates includes our share of the losses of Pelago Networks, Inc. and Telchemy, Incorporated.

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Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations

        The following discussion should be read in conjunction with the consolidated financial statements and related notes in Item 8 of this report. The discussion contains forward-looking statements that involve known and unknown risks and uncertainties, including those set forth below under "Factors That May Affect Future Results."

Overview

        We develop software and hardware platforms that original equipment manufacturers, or OEMs, developers and corporate information technology managers build into their communications systems. Customers incorporate our products into applications, systems and services that allow voice, fax and data to be distributed over both Internet protocol, or IP, packet-based networks, which we refer to as the New Network, and the traditional circuit-switched telephone network. We supply products for media processing, network interface, call control and signal processing, including protocols that allow Internet and traditional telephony systems to communicate.

        We measure our operating success using both financial and market metrics. The financial metrics include revenue, gross profit, operating expenses, and income from continuing operations, as well as working capital and cash provided by operating activities. Other key metrics include the total number of enterprise and service provider customers, customers whose purchases exceed $100,000, and the portion of our revenue that is generated by the sales of products for applications in the New Network. Our long-term business model stresses our commitment to establishing and maintaining close customer relationships and to continuing to develop innovative products.

        The most significant trend that has impacted our business has been the unfavorable economic conditions affecting the communications sector. This had resulted in a decrease in our revenue from 2000 to 2001 and from 2001 to 2002. Furthermore, we experienced revenue decreases for the first two quarters of 2003 when compared to the corresponding quarters of 2002. Sales of products, particularly for applications in the New Network, to OEMs for use by large service providers have declined most significantly over these periods. In response to the revenue decreases, we implemented expense control programs to reduce operating expenses, while at the same time, we have continued to invest in developing products that we believe our customers will need when the economy further improves. We are seeing signs that the economic conditions in our industry may be improving since revenue for the third and fourth quarter of 2003 exceeded the revenue in the corresponding periods of 2002, and we expect the revenue for each quarter of 2004 to exceed the revenue for each quarter of 2003.

        Despite these economic conditions, we have been able to increase our cash and marketable debt securities balances from $38 million at December 31, 2001 to $56 million at December 31, 2003. This was accomplished primarily through income tax refunds, operating expense reductions, inventory reductions, and the sale of a business segment. If economic conditions do not continue to improve or if they weaken again, we may experience adverse effects on our business, operating results, and cash and marketable debt securities balances.

Application of Critical Accounting Policies

        Management's discussion and analysis of financial condition and results of operations is based upon our consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States of America. We make estimates and assumptions in the preparation of the consolidated financial statements that affect the reported amounts of assets and liabilities, revenue and expenses, and the related disclosures of contingent assets and liabilities. These estimates form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. We base our estimates and judgments on historical

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experience and on various other assumptions that we believe are reasonable under the circumstances. However, actual results may differ from these estimates under different assumptions or conditions.

        The following critical accounting policies require the use of significant judgment and estimates in the preparation of the consolidated financial statements. This listing is not a comprehensive list of all of our significant accounting policies. For further information regarding the application of these and other accounting policies, see Note 1 to the consolidated financial statements in Item 8 of this report.

Revenue Recognition

        Revenue from product sales is recognized upon shipment to the customer (which constitutes delivery), provided that persuasive evidence of an arrangement exists, the fee is fixed or determinable, and collection is reasonably assured. In determining when to recognize revenue we often are required to exercise judgment. To the extent that one or more of these criteria are not met, which has occurred from time to time, revenue is deferred until such time as all four conditions are satisfied. We record a provision for estimated sales returns and allowances on product sales in the same period as the related revenue is recorded. These estimates are based on historical sales returns, analysis of credit memo data and other known factors. Actual results could differ from these estimates and could therefore impact our results of operations and cash flows.

Allowances for Doubtful Accounts

        Accounts receivable are reduced by an allowance for amounts that may become uncollectible in the future. The estimated allowance for doubtful accounts is based primarily on a specific analysis of accounts in the receivable portfolio and a general reserve based on the aging of receivables. While management believes the allowance to be adequate, if the financial condition of our customers were to change or deteriorate, resulting in an impairment of their ability to make payments, additional allowances may be required and could materially impact our financial position and results of operations.

Inventory Allowances

        We evaluate our inventories for estimated excess quantities and obsolescence. This evaluation includes analyses of sales levels by product and projections of anticipated future demand. In addition, we assess the impact of changing technology on our inventory. We provide reserves for inventories that are considered excess or obsolete. If future demand or market conditions are different than our projections, additional inventory reserves may be required and would be reflected in cost of sales in the period in which the revision is made. If future demand or market conditions are more favorable and products for which reserves have been provided become more marketable and are sold, our gross profit could improve. These actions could impact both our results of operations and our cash flows.

Intangible Assets

        We review our intangible assets for impairment periodically and whenever events or changes in circumstances indicate that the carrying value may not be recoverable. The evaluation of the recoverability of our intangible assets includes assumptions regarding estimated future undiscounted cash flows associated with these assets and other factors. If these estimates or assumptions change in the future, we may be required to record impairment charges for these assets. Such an impairment charge would impact the results of operations, but would not directly impact our cash flows. All of our remaining net intangible assets are being amortized, with original useful lives of approximately five to ten years.

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Deferred Tax Assets

        We assess the carrying value of our deferred tax assets to determine if it is more likely than not that we will be able to generate sufficient future taxable income of the appropriate type in each tax jurisdiction in which we operate in order to realize these assets. This assessment requires us to make estimates and assumptions about our future profitability. Prior to 2002, our assessment indicated that it was more likely than not that we would be able to realize our deferred asset and therefore we did not record any valuation allowances. In 2002, we reduced the deferred tax asset to its estimated realizable value by recording a valuation allowance. In determining the carrying value of the deferred tax assets as of December 31, 2003, we are assuming profitability in the future and that it is more likely than not that we will be able to realize these net deferred assets. This assumption is based in part upon our history of profitability and our profitability for the year ended December 31, 2003. If current economic conditions weaken or future results of operations are less than expected, future assessments may result in a determination that all or a portion of the remaining deferred tax assets are not realizable. As a result, we may need to establish additional valuation allowances for all or a portion of the deferred tax assets, which may have a material adverse effect on our results of operations.

Accrued Warranty Costs

        We accrue for warranty costs based on historical trends in product return rates and the expected material and labor costs to provide warranty services. If we were to experience an increase in warranty claims compared with our historical experience, or if costs of servicing warranty claims were greater than the expectation on which the accrual had been based, our gross profits could be adversely affected. See Note 8 to the consolidated financial statements in Item 8 of this report for activity in our reserves for estimated warranty costs.

Discontinued Operations

        Prior to February 8, 2001, we were organized and reported the results of our operations in three operating segments, Brooktrout Technology, Brooktrout Software, and Interspeed. On February 8, 2001, our board of directors adopted formal plans to discontinue our Brooktrout Software and Interspeed segments. We have accounted for these businesses as discontinued operations. These businesses were substantially disposed of prior to December 31, 2001, and adjustments recorded in 2002 primarily reflect additional proceeds and changes in estimates to the amounts recorded related to gains or losses on disposal. For the years ended December 31, 2002 and 2001, we recorded total gains from discontinued operations of $0.2 million and $7.0 million, respectively, while in 2003, there were no gains or losses from discontinued operations. See Note 2 to the consolidated financial statements in Item 8 of this report.

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Results of Operations

        The following discussion focuses on our results from continuing operations. The table below sets forth certain consolidated statements of operations data as a percentage of total revenue for the periods presented.