CARROLLTON, Texas--(BUSINESS WIRE)--May 31, 2007--Integrated Security Systems, Inc. (ISSI), (OTCBB Symbol: IZZI) today announced that it's wholly owned subsidiary, Intelli-Site, Inc., has completed the initial installation of the Intelli-Site security system integration software to a large Middle Eastern governmental entity. The initial installation, valued in excess of $200,000, will act as the central integration tool for the organization throughout the nation and will tie together a wide variety of access control, camera, video and other security hardware platforms through one graphical user interface.