Trillium Digital Systems Inc. announces new ATM Signalling UNI 4.0 software source code

Business Wire, May 17, 1996

LOS ANGELES--(BUSINESS WIRE)--May 17, 1996--Trillium Digital Systems Inc. Friday announced that it has completed development and testing of ATM Signalling software which is fully compliant to the ATM Forum UNI 4.0 specification.

The ATM Forum UNI 4.0 specification provides a new set of signalling capabilities between ATM end users and ATM switches.

The new signalling software supports ATM Forum UNI 4.0, UNI 3.1, UNI 3.0 and ITU-T Q.2931 variants of the protocol. It also supports the IISP and PNNI signalling protocols. All of these capabilities are configurable per port at run time. These features provide a great deal of flexibility for ATM products that may need to support different variants of the signalling specifications.

New features added for the UNI 4.0 release are: leaf initiated join, group addresses, switched virtual paths, available bit rate signalling, quality of service parameters and supplementary services (e.g., connected line presentation). In addition to increased functionality, the new release will provide significantly enhanced performance relative to previous releases.

Jeff Lawrence, Trillium's president and chief executive officer, said: ``Trillium is an active participant in the ATM Forum. We have been following the ATM Signalling working group very closely and have made a significant effort to ensure that our existing and potential customers will be able to provide this important functionality in their products soon after the specification is approved.''

The ATM Signalling UNI 4.0 software will start shipping in the beginning of June 1996. The ATM Signalling UNI 4.0 software will also interwork with Trillium's Q.SAAL, UME, LAN Emulation Client, LAN Emulation Services and PNNI Routing software.

Existing Trillium licensees under warranty or maintenance will receive these UNI 4.0 capabilities automatically. New customers may license the software for a one-time fee. The fee includes source software, documentation, a training course and technical support.

Trillium Digital Systems, a privately held company founded in 1988, designs, markets and licenses standards-based communications software. Trillium offers software for the Signalling System 7 (SS7), Asynchronous Transfer Mode (ATM), Integrated Services Digital Networks (ISDN), Frame Relay and X.25 communications protocols.

Trillium is a leading supplier of communications software technology to computer and communications-equipment manufacturers and has licensed its source software to more than 200 companies throughout the world for use in a wide range of switching, network- access, service-platform, operating-system and test-equipment products.

Trillium communications software is written in the C programming language and is designed so that it may be licensed in source form by manufacturers for integration into a wide range of computer and communications products.

Manufacturers license Trillium's software technology to speed the time to market, reduce the risk and lower the cost of developing and providing standards-based communications protocols within their products. -0-

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CONTACT: Trillium Digital Systems Inc., Los Angeles

Jeff Lawrence, 310/479-0500

310/575-0172 (fax)

j_lawrence@trillium.com (e-mail)