Integrated Security Systems, Inc. Announces DoorTek Access Control Upgrade at Petro-Canada

Business Wire, Jan 11, 2005

IRVING, Texas -- Integrated Security Systems, Inc. (ISSI), (OTCBB:IZZI) today announced that it's wholly owned subsidiary, DoorTek Corporation, has recently completed a major system upgrade at the Petro-Canada Centre located in Calgary, Alberta, Canada.

DoorTek Corporation, a world leader in access control and correctional security electronics products, along with Jarret ESP Services, Ltd. completed a complex security system upgrade at the Petro-Canada Centre. This system upgrade includes more than 380 HID i-Class card readers, more than 60 new 200-series DoorTek controllers, and the new DoorTek DT-2001 Access Control Management software. This upgrade replaces an existing DoorTek system that was originally installed in 1984. Petro-Canada Centre, a Class AA office project jointly owned by Brookfield Properties Corporation and ARCI, Ltd., is the tallest high-rise office complex in western Canada.

"This highly complex system upgrade was completed with minimal down-time to the end user. The smooth transition is a tribute to our maintenance of a completely compatible design across the range of our products and the technical expertise of our distributor: Jarret ESP Services. Having a twenty-year-old system on line is something that few access control system providers can boast of and this fact alone is a tribute to our over-all product quality," stated Robert Gardner, President of DoorTek Corporation.

"The Petro-Canada Centre project is indicative of the value DoorTek brings to the ISSI family of companies and we are looking forward to more good things to come from this fine organization going forward," said C. A. Rundell, Jr., Chairman and CEO of ISSI.

About ISSI

Headquartered in Irving, Texas, ISSI is a technology company that provides products and services for homeland security needs. ISSI also designs, develops and markets safety equipment and security software to the commercial, industrial and governmental marketplaces. ISSI's Intelli-Site(R) provides users with a software solution that integrates existing subsystems from multiple vendors without incurring the additional costs associated with upgrades or replacement. Intelli-Site(R) features a user-defined graphics interface that controls various security devices within one or multiple facilities. DoorTek Corporation is a leading provider of card access control and correctional security products. ISSI is a leading provider of anti-terrorist barriers, traffic control and safety systems within the road and bridge and perimeter security gate industries. ISSI designs, manufactures and distributes warning gates, lane changers, airport and navigational lighting and perimeter security gates and operators ISSI conducts its design, development, manufacturing and distribution activities through three wholly owned subsidiaries: Intelli-Site, Inc., DoorTek Corporation and B&B ARMR Corporation. For more information, please visit www.integratedsecurity.com, www.bb-armr.com, www.intelli-site.com, or www.doortek.com.

This information contains certain forward-looking statements. It is important to note that ISSI's actual results could differ materially from those projected by such forward-looking statements. Important factors that could cause actual results to differ materially from those projected in the forward-looking statements include, but are not limited to, the following: operations may not improve as projected, new products may not be accepted by the marketplace as anticipated, or new products may take longer to develop than anticipated.