AIS agreement signed

SOFTWARE RADIO TECHNOLOGY PLC AIS Agreement Signed The Directors of Software Radio Technology plc ("SRT") are pleased to announce that SRT has signed L3 Communications Corporation (Aviation Recorders Division) ("L3") as a customer for its AIS technology. L3 is a US-based company that will use technology provided by SRT to create an AIS Aids to Navigation ("AtoN") product for sale through its international distributor network. The AtoN product will mainly be installed on buoys and is an important element of the growing national AIS systems. They provide permanent hazard warnings to shipping and vital environment information on tides, temperature and wind to authorities. SRT and L3 expect the product to be one of the first into the market meeting all required specifications. Prototypes are expected in September 2006 with production by the end of the year. SRT will be paid an initial fee with ongoing royalties on each product sold. Simon Tucker, SRT's Commercial Director said: "Following the successful launch of our Class B technology earlier this year, we took the decision to invest further in our AIS business through the development of the other elements of an AIS system. AtoN is an important element of all AIS systems. L3 has a reputation as a high quality supplier of these types of products with a well established international brand and distributor base. We are therefore very excited to be working with L3 in this area." Margaret Browning, L3 Communications (Aviation Recorders Division) Technical Director said: "L3 has worked hard to establish itself as one of the leading players in the growing US and international AIS market. The launch of an AtoN product in 2006 is consistent with our strategy of continuing to lead in this market. SRT's AIS expertise and technology are well known and therefore we are delighted to have them as our partners." Software Radio Technology plc 01761 409500 Simon Tucker simon.tucker@softwarerad.com Shamus Kelly shamus.kelly@softwarerad.com Westhouse Securities LLP 0161 838 9140 Tim Feather tim.feather@westhousesecurities.com Tavistock Communications 020 7920 3166 Christian Taylor-Wilkinson ctaylor-wilkinson@tavistock.co.uk About Software Radio Technology SRT is a developer and licensor of digital wireless technology reference designs that facilitate and fast-track the manufacture of sophisticated digital communications and tracking/surveillance products for use within the professional homeland security market. Currently SRT develops and supplies technology solutions for Marine AIS and PMR-TETRA. About L3 Communications Based in the Florida, USA, L3 Communications Corp is a NASDAQ listed company providing a variety of essential communication and electronics products for multiple applications and markets.