ISYS Integral Systems, Inc. (MM)

Integral Systems, Inc., (Nasdaq:ISYS) announced today that Steve Williams, Signal Instrumentation Business Area Manager for RT Logic, a wholly-owned subsidiary of Integral Systems, will present a paper at the 2011 European Test and Telemetry Conference (ETTC 2011). Williams will discuss how Radio Frequency (RF) channel simulation technology can be used to cost-effectively test and verify communication system hardware, firmware and software to reduce risk and cost in test range and operational environments. ETTC 2011 will be held at the Pierre Baudis Conférence Center in Toulouse, France, June 14 through 16, 2011.

Event: 2011 European Test and Telemetry Conference (ETTC 2011)

Title: Testing with RF Channel Simulators for Increased Quality and Decreased Risk, Cost and Schedule

Presentation Date/Time: June 15, 2011 at 14.00

Location: Pierre Baudis Conférence Center, Toulouse, France (Salle Guillaumet)

For more information on this event, please visit http://www.ettc2011.org. For additional information on the RT Logic Telemetrix® 400 Channel Simulator (T400CS), go to http://www.rtlogic.com/datasheets/RTL-DST-T400CS.pdf.

ABOUT STEVE WILLIAMS

Steve Williams is an RT Logic Business Area Manger responsible for R&D and business development activities for RT Logic's RF Channel Simulator, Range Test System, UAV/ Target/Missile Test Systems, Spectral Warrior Interference Detection System and high-rate digitizers. He is a frequent presenter and author on these and related subjects. His 30-year digital and RF instrumentation career has included R&D, management and business positions at RT Logic, Hewlett-Packard, Agilent Technologies and precisionWave Corporation, which he co-founded. Steve holds a BSEE from the University of Illinois.

ABOUT INTEGRAL SYSTEMS Integral Systems, Inc. is a global provider of products, systems and services for satellite command and control, telemetry and digital signal processing, data communications, enterprise network management and communications information assurance. We specialize in developing, managing and operating secure communications networks, both satellite and terrestrial, as well as systems and services to detect, characterize and geolocate sources of RF interference. Our customers include U.S. and foreign commercial, government, military and intelligence organizations. For almost 30 years, customers have relied on Integral Systems to design and deliver innovative commercial-based products, solutions and services that are cost-effective and reduce delivery schedules and risk. The Integral Systems family of solution providers (Integral Systems, Inc., Integral Systems Europe, Lumistar, Inc., Newpoint Technologies, Inc., RT Logic and SAT Corporation) as well as our services organization, Integral Systems Service Solutions (IS3), leads the market in offering complete ground segment solutions. Our dedication to "The Integral Difference" has solidified long-term relationships with the U.S. DoD, NASA, NOAA and nearly every commercial satellite operator in the world. For more information, visit www.integ.com.

CONTACT: Andrew Miller
         Vice President, External Communications
         Integral Systems, Inc.
         Phone: 443.539.5124
         amiller@integ.com