Calabasas, CA – September 1, 2006 – National Technical Systems, Inc. (NASDAQ: (NTSC) (NTS) announced today that it has been selected by Calix to manage Customer Premise Equipment (CPE) testing within its Calix Compatible Program in order to ensure seamless interoperability with the Calix line of access solutions.

At its Santa Rosa, CA Network Architecture & Interoperability Laboratory (NAIL), NTS will independently test and validate interoperability of a wide range of CPE devices with the Calix platforms. "We are very pleased that Calix has selected us to outsource their CPE testing requirements," said Curt Wheeling, NTS General Manager of the NAIL.  "NTS has invested significantly in the NAIL facility in recent years, expanding our abilities to simulate carrier networks and test to ensure that any new devices will interoperate with their existing network infrastructure," added Wheeling.

"Certification testing is critical to the deployment of the Calix C7 platform in our customers' networks.  Service providers want a choice in procuring CPE for their networks and also demand that the equipment interoperate flawlessly with our platform as new customers are added," said Rick Johnston, Calix Vice President of Business Development.  "NTS' unique testing capabilities in the NAIL give us the assurance that our service provider customers can choose from a list of pre-certified CPE manufacturers and know that the equipment will work with our platform."  

“In today’s market, telecommunications equipment suppliers like Calix focus on improving their core innovation competencies and look to organizations like NTS to help with support activities. When they use NTS, they have access to all the latest test equipment and only have to pay for what they use. At NTS we help our clients achieve significant cost and investment savings in support of their testing needs,” stated Osman Sakr, NTS Chief Technical Officer.

About Calix

Calix is the largest telecom equipment supplier focused solely on access solutions for broadband service delivery. Service providers deploy Calix access systems to enable a rich set of information, communication, and entertainment services and to expand their revenue base beyond connectivity. Calix access innovation helps service providers transform their networks from circuit to packet, narrowband to broadband, and to drive fiber deeper into the network. Calix has deployed its solutions in hundreds of service provider networks throughout North America, and has shipped more than two million ports. For more information, visit the Calix website at www.calix.com.

About NTS

National Technical Systems, Inc. is a leading provider of engineering services to the defense, aerospace, telecommunications, automotive and high technology markets. Through a world-wide network of resources, NTS provides full product life-cycle support, offering world class design engineering, compliance, testing, certification, quality registration and program management. For additional information about NTS, visit our website at www.ntscorp.com or call 800-270-2516.

The statements in this press release that relate to future plans, events or performance, are forward-looking statements that involve risks and uncertainties, including risks associated with uncertainties pertaining to customer orders, demand for services and products, development of markets for the companies’ services and products and other risks identified in the companies’ SEC filings.  Actual results, events and performance may differ materially.  Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof.  The companies undertake no obligation to release publicly the result of any revisions to these forward-looking statements that may be made to reflect events or circumstances after the date hereof or to reflect the occurrence of unanticipated events.

"Safe Harbor" Statement under the Private Securities Litigation Reform Act of 1995: Statements in this press release regarding National Technical Systems' business which are not historical facts are "forward-looking statements" that involve risks and uncertainties. For a discussion of such risks and uncertainties, which could cause actual results to differ from those contained in the forward-looking statements, see "Risk Factors" in the Company's Annual Report or Form 10-K for the most recently ended fiscal year.