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TELULAR AND AT&T CO-DEVELOP ADVANCED CELLULAR PRIVACY APPLICATION

 -- New Technology Delivers End-to-End' Cellular Security --
 DALLAS, March 4 /PRNewswire/ -- AT&T Secure Communications Systems has finalized an agreement with Telular Group L.P. for the development of an advanced new scrambling system that provides "end-to-end" privacy of conversations on cellular airwaves. The companies also agreed to cooperatively market cellular products currently manufactured by both AT&T (NYSE: T) and Telular.
 The new technology, announced here at the Cellular Telecommunications Industry Association (CTIA) annual conference, enables end users to place calls from a privacy-equipped cellular address linked directly to the office PBX or key system, where it is descrambled without ever traveling over land lines.
 Privacy is provided at the cellular phone by a module that fits conveniently between the body of a hand-held phone and its slide-on battery; a similar module connects easily between the handset and transceiver of transportable and mobile phones. The secured cellular number is integrated into the office PBX or key telephone system by Telular's patented PhoneCell fixed cellular interface, which converts any standard telephone equipment to available cellular service.
 The new cellular privacy application builds on AT&T's existing cellular telephone and switching office unit, which provides privacy for the over-the-air portion of cellular calls. The scrambled signal from the phone is descrambled at the switch and transmitted to its destination as a regular phone signal.
 "The Telular PhoneCell adds a powerful new capability to the AT&T Cellular Privacy System," said Ed Hickey, AT&T vice president, Secure Communication Systems. "Our system can now deliver cellular privacy in either form a user needs it -- end to end or over the air."
 Jim Phillips, president of Telular Systems, added that the alliance of the two companies is representative of an aggressive new movement toward fixed cellular technology among industry leaders.
 "The telecommunications industry is sprinting toward this new growth arena, which effectively moves the power of burgeoning cellular infrastructure from the street and into the office," Phillips said. "AT&T's aggressive distribution of this enhanced cellular privacy system and our entire PhoneCell product line is helping to set new, worldwide standards for this exciting fixed cellular technology."
 Under the agreement, Wilmette, Ill.-based Telular plans to incorporate AT&T's cellular privacy technology into future production of its cellular pay phones, and will market AT&T cellular privacy products through its extensive international distribution network. Similarly, AT&T Secure Communications Systems, Greensboro, N.C., will market Telular's PhoneCell line as part of its cellular privacy system.
 Telular also will develop a special model of its new PCS One product line for the AT&T model 9000 portable cellular phone. Telular's PCS One, also introduced at the CTIA conference, enables end users to place and receive calls from multiple locations through a single telephone line. When the hand-held phone is placed in the special PCS One charging unit, all standard telephone equipment linked to its standard RJ11 port is instantly activated for use on that cellular line. Through the use of multiple PCS One units, a single hand-held phone can activate the same cellular address in unlimited numbers of locations.
 AT&T Secure Communication Systems provides products for secure voice, data, fax, cellular and video communication. It also provides secure systems engineering and integration services. Its customers include the governments of the United States and other nations, as well as major corporations around the world. AT&T Secure Communications Systems is headquartered in Greensboro, N.C.
 Founded in 1986, Telular has developed and patented telecommunications interface technology that greatly expands upon the traditional applications of cellular voice and data communications. Telular technology instantly converts any phone system, fax or computer to available cellular service. Telular products provide primary wireless service when traditional telephone service is more expensive, or is too costly to install or maintain, unavailable on a timely basis, or of poor quality. And Telular offers one of the fastest growing, most flexible technologies for data monitoring and telemetry. Telular products also provide efficient back-up communications when regular service is interrupted. Telular is the worldwide standard for fixed cellular and data communications -- the one true bridge between wire and wireless.
 The line of fixed cellular products developed and marketed by Telular include the compact PhoneCell(TM) 1, PhoneCell(TM) 4, PhoneCell(TM) 24, and modular PhoneCell CPX(TM); and the new Telular PCS One(TM), an advanced new telecommunications system that enables end users to place and receive calls from multiple locations through a single telephone number. Other Telular products include the TelGuard(TM) wireless security and fire alarm system, the T-Fax(TM) mobile facsimile and Telular's line of wireless cellular pay phones for off-shore and marine use, mass transit and literally anywhere land lines can't go.
 For more information contact Telular Systems at 1-800-TELULAR.
 -0- 3/4/93
 /CONTACT: Scott Phillips of Phillips Communications, 312-943-8858, for Telular Group L.P./
 (T)


CO: Telular Group L.P.; AT&T Secure Communications Systems ST: Texas, North Carolina IN: TLS SU: PDT

LD -- NY105 -- 3164 03/04/93 16:40 EST
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Date:Mar 4, 1993
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