Grayson Wireless and TCS Offer Carriers Integrated E9-1-1 Solution.

Business Editors, High-Tech Writers

ANNAPOLIS, Md.--(BUSINESS WIRE)--Aug. 29, 2001

TeleCommunication Systems, Inc. (TCS)(Nasdaq:TSYS), a key architect of wireless location and messaging software, has successfully completed compatibility testing with Grayson Wireless' Geometrix(R) Wireless Location System.

The testing assures wireless carriers that the two systems can operate together to provide a complete solution to the Federal Communications Commission's E9-1-1 Phase II caller location requirements. Geometrix provides the technology to locate wireless 9-1-1 callers and the TCS Xypoint(R) Location Platform routes the location information and provides the Public Safety Answering Points (PSAPs) with the caller's location coordinates.

The tests were divided into two phases, verification and compatibility. This allows TCS, functioning as a Mobile Positioning Center (MPC), to request and obtain the caller location information determined by the Geometrix system functioning as a Positioning Determining Entity (PDE), as defined in the TIA J-STD-036 industry standard. The companies successfully completed all tests demonstrating seamless processing and delivery of Phase II E9-1-1 location information.

"We are pleased that the Grayson platform is fully compatible with the TCS Xypoint Location Platform ensuring a smooth transition to Phase II for our mutual carrier customers," said Gregg Blodgett, senior vice president of Network Services at TCS.

TCS provides Phase I wireless location services to 18 wireless carriers, including Verizon Wireless, U.S. Cellular and Cricket Communications. With more than 7 million wireless subscribers nationwide, the company's Xypoint Location Platform is the only software and network services platform to combine presence, location and privacy centers in one unit.

ABOUT TELECOMMUNICATION SYSTEMS, INC.

TCS is evolving wireless technology. As the key architect of wireless messaging and location technology, TCS is delivering essential software, services and solutions to carriers that enable people to better manage their mobile lifestyle. TCS occupies a privileged position within the core of the wireless carrier network enabling it to develop technology that ensures the security, reliability and privacy of people's wireless messages.

Today, TCS is a preferred technology provider to carriers worldwide including Vodafone, Verizon Wireless, Telefonica, VoiceStream and Qwest. Through its Solutions group, TCS deploys advanced technologies and products that promote the continued evolution of wireless services. Visit the web site at www.telecomsys.com.

ABOUT GRAYSON WIRELESS

Grayson Wireless ( www.geometrix911.com ), a division of Allen Telecom Inc., (NYSE:ALN) designs, builds, and markets the Geometrix system, a state-of-the-art, scalable, cost-effective, network overlay solution intended to allow carriers to meet the FCC's stringent requirements for wireless E911 caller location. Geometrix currently works with CDMA, TDMA, AMPS, and iDEN handsets (GSM compatibility is in the testing phase of development); thus offering compatibility with the vast majority of wireless phones in use in the United States. In addition to meeting FCC E 911 requirements, Geometrix can also provide caller-locating support for a wide variety of location-based value-added services.

Allen Telecom Inc. (http://www.allentele.com) is a leading supplier of wireless equipment to the global telecommunications infrastructure market. Grayson Wireless supplies measurement and signal processing systems for testing the performance of a wireless network, network-based wireless caller geolocation systems for E911 and value added services. FOREM supplies sophisticated filters, duplexers, combiners, amplifiers and microwave radios to an array of OEM customers. MIKOM focuses on providing repeaters, in-building systems and other products that enhance both the coverage and the capacity of a wireless system. Tekmar Sistemi provides integrated low power fiber optic and cable distributed antenna systems for indoor coverage systems. Decibel Products and Antenna Specialists manufacture land based and mobile antennas in frequency bands that cover all of the traditional wireless networks. Comsearch offers engineering and consulting services for wireless operators.

This announcement contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities and Exchange Act of 1934, as amended. These statements are based upon TCS's current expectations and assumptions that are subject to a number of risks and uncertainties that would cause actual results to differ materially from those anticipated.

The actual results realized by the Company could differ materially from the statements made herein, depending in particular upon the risks and uncertainties described in the Company's filings with the Securities and Exchange Commission (SEC). These include the risks and uncertainties relating to the Company's future financial results and the ability of the Company to (i) reach profitability as early as anticipated, (ii) continue to rely on third parties to market and sell the Company's products and for other relevant support, (iii) adapt and integrate new technologies into its products, (iv) expand its business offerings in the new wireless data industry, (v) capitalize on opportunities in the marketplace, (vi) develop software without any errors or defects, and (vii) implement its sales and marketing strategies.

Existing and prospective investors are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof. The Company undertakes no obligation to update or revise the information in this press release, whether as a result of new information, future events or circumstances, or otherwise.