National Technical Systems Advances VoIP and SIP Test Capability for Telecom Infrastructure Equipment with Addition of New Nortel Class 5 “Soft” Switch

Calabasas, CA – July 22, 2005 – National Technical Systems, Inc. (NTS) (NASDAQ: NTSC), a leading provider of quality and conformance testing and managed services, announced today that it is the first national independent laboratory to acquire a Nortel CS2000 Class 5 Switch. The next generation Class 5 switch enhances NTS’ capability to provide carrier-class network interoperability, functionality and performance testing for the latest emerging technologies including Voice over Internet Protocol (VoIP) and Session Initiation Protocol (SIP).  

The Nortel “Soft” switch is the latest addition to NTS’ extensive Telecom Network Architecture and Interoperability Laboratory (NAIL) featuring Lucent 5ESS, Nortel DMS 100 and Siemens EWSD switches and over sixty enclosed platform test cells each with 24 Cat 6 cables. The NTS NAIL provides telecom equipment manufacturers and service providers a unique environment to test interoperability of next generation packet-based VoIP devices with the legacy circuit switched equipment. Interoperability of TR-57, TR-08 and GR-303 interfaces can be tested, verified and certified.  

CEO and President Bill McGinnis notes, “Seamless interoperability between these new technologies and the carrier’s installed base of legacy systems is absolutely critical. NTS is one of the only independent labs that can test and validate these new solutions before deploying them on live networks.”  

“We continue to be at the forefront of telecom test technology”, comments NTS Santa Rosa's VP of Operations, Curt Wheeling. “We were the first independent lab to offer G.983 Passive Optical Network (PON) testing and certification and our recent incorporation into NTS adds extensive NEBS testing capability including EMI, seismic and fire.”

Growth and new technologies in the telecommunications market has made the test and certification for the carriers and equipment manufacturers a viable segment of the NTS customer base. The NTS NAIL offers extensive telecom capabilities including testing and certification of G.983 PONs; ADSL and ADSL2+ modems; interoperability of an ONT (optical network terminals) and the capability to test hybrid fiber/copper networks.

NTS worldwide also has facilities to conduct Electromagnetic Compatibility (EMC), Product Safety and Electrical testing to ITE, telecommunications, USB cable and other industry specifications. The NTS advanced Optics Lab is approved to conduct testing on Passive Fiber Optic Components and Optical Cable for the U.S. Military and major telecommunication carriers.

About NTS

National Technical Systems, Inc. is a business-to-business services company providing organizations in the aerospace, defense, information technology (IT) and high technology markets integrated testing, certification, quality registration, systems evaluation and engineering solutions.  For additional information about National Technical Systems, visit its web site at         

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"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.