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Larscom introduces E1 ATM inverse multiplexer for the Orion 4000; New Module imuxes ATM traffic over international circuits.



SANTA CLARA, Calif.--(BUSINESS WIRE)--May 21, 1997--Larscom Incorporated (NASDAQ NASDAQ
 in full National Association of Securities Dealers Automated Quotations

U.S. market for over-the-counter securities. Established in 1971 by the National Association of Securities Dealers (NASD), NASDAQ is an automated quotation system that reports on
:LARS LARS Launch and Recovery System
LARS Large Animal Research Station
LARS Los Angeles Riot Squad
LARS Los Angeles Radiological Society
LARS Light Artillery Rocket System
LARS Left Add, Right Subtract (artillery fire sighting) 
) today expanded its ATM WAN access solutions by introducing the second of its planned suite of ATM inverse multiplexers.

The new IMUX/E1-A45 ATM inverse multiplexer module for Larscom's Orion 4000 broadband access platform addresses multinational carriers' and enterprises' needs to cost-effectively transport ATM traffic worldwide.

"International bandwidth, especially with transatlantic or transpacific connections, is extremely expensive to provide," said Erin Dunne, Manager of Research Services, Vertical Systems.

"The Orion 4000's inverse multiplexing technology provides flexibility by allowing multiple lower-bandwidth lines to be combined for higher-speed connections. With the IMUX/E1-A45, multiple E1lines can be combined to provide ATM service. I believe this will especially appeal to the multinational network service providers who are busily ramping up data rates throughout their networks."

The IMUX/E1-A45 ATM inverse multiplexer brings the benefits of imuxing to the international WAN. It connects to any standard ATM DS3 UNI on a switch, router, or other ATM device, and transports the ATM cellstream over up to eight E1 lines, providing an effective alternative to unavailable or cost-prohibitive E3 circuits.

The IMUX/E1-A45 is ideal for interconnecting ATM islands and extending ATM trunks trans-ocean or trans-continent. It supports all traffic classes and Qualities of Service, including CBR (1) (Computer-Based Reference) Reference materials accessible by computer in order to help people do their jobs quicker. For example, this database on disk!

(2) (Constant Bit Rate) A uniform transmission rate.
, VBR (1) See MP3 VBR.

(2) (Variable Bit Rate) Refers to a communications or computer channel that changes its transmission speed based on any number of criteria.
, UBR (Unspecified Bit Rate) An asynchronous transfer mode (ATM) level of service that does not guarantee available bandwidth. It is very efficient, but not used for critical data. , ABR (1) (AutoBaud Rate detect) The analysis of the first characters of a message to determine its transmission speed and number of start and stop bits.

(2) (Available Bit R
, and AAL (ATM Adaption Layer) The part of the ATM protocol that breaks up application packets into 48-byte payloads which become ATM cells when the 5-byte headers are attached. The AAL resides between the higher layer transport protocols and the ATM layer. 1-AAL5.

The second of Larscom's ATM inverse multiplexers, the IMUX/E1-A45 complements the Orion 4000's IMUX-A45 module, which inverse multiplexes an ATM cellstream across up to eight T1 lines. Both modules can simultaneously co-reside with the rich variety of TDM-based modules in an Orion 4000 system including T1, NxT1, NxE1, clear channel T3 and channelized Refers to an architecture that transmits data in channels. It often refers to the 64 Kbps channels in T1 lines, which were originally developed to handle digitized voice streams (TDM). See TDM.  T3, thereby maximizing a customer's flexibility with regard to WAN configuration options.

The IMUX/E1-A45 module has a list price of $17,850. The Orion 4000 broadband access multiplexer starts at $6,550. To obtain additional product information, please visit the company's web site at www.larscom.com. To arrange an interview, contact Michelle Solis at 408/988-6600 ext. 274. For investor relations issues, contact Morgen-Walke Associates at 415/296-7383.

Larscom Incorporated (NASDAQ:LARS) is a leading provider of high speed wide area network (WAN) access equipment. Its customers include carriers, Internet service providers, corporate users, and government agencies worldwide.

Its products cover a wide range of transmission rates and services including full and fractional T1, E1, NxT1, NxE1, and T3, as well as frame relay and ATM inverse multiplexing. To help ensure optimum network performance, Larscom products feature advanced monitoring, diagnostic, and management functions, including SNMP (Simple Network Management Protocol) A widely used network monitoring and control protocol. Data are passed from SNMP agents, which are hardware and/or software processes reporting activity in each network device (hub, router, bridge, etc. .

The company's headquarters are located at 4600 Patrick Henry Drive, Santa Clara, California Santa Clara, California (IPA: /ˌsæntəˈklærə/) , founded in 1777 and incorporated in 1852, is a city in Santa Clara County, in the U.S. state of California.  95054.

Any forward looking statements in this news release are based on current expectations and beliefs and are subject to risks and uncertainties that could cause the actual results to differ materially.

Factors that could cause actual results to differ materially include the product's market acceptance, potentially competitive products, as well as additional risk factors as discussed in the "Risk Factors" section of Larscom's prospectus, dated December 18, 1996, and Larscom's quarterly reports filed with the U.S. Securities Exchange Commission (SEC).

CONTACT: Larscom Incorporated

Ursula Burger, 408/988-6600

burger@larscom.com

http://www.larscom.com

or

Sterling Communications, Inc.

Paul Forecki, 206/265-3358

pforecki@sterlingpr.com
COPYRIGHT 1997 Business Wire
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 1997, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

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Publication:Business Wire
Date:May 21, 1997
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