Printer Friendly

AT&T PROVIDES BACKGROUND INFORMATION ON GTE'S SONET

 LOS ANGELES, June 15 /PRNewswire/ -- Don't look now ... but the telephone in the home or office is turning into an advanced information network.
 The nation's largest local telephone company is working with AT&T to lay the foundation for the information network of tomorrow -- installing highly sophisticated fiber optic systems, called SONET rings, around major cities in the country.
 The first such system, a 50.3-mile ring, is up and running in Southern California (see attached technical information).
 "This is what President Clinton and others are talking about when they discuss a national telecommunications infrastructure," said Steve Smith, AT&T sales vice president. "It will help keep America competitive and opens the door to vast new services."
 Developed by AT&T Bell Laboratories, GTE's SONET fiber optic rings will be able to deliver interactive videoconferencing, the most advanced data services and, eventually, video on demand.
 In addition, GTE's network becomes virtually "self-healing," with the ability to automatically reroute transmission in as little as 60 milliseconds.
 "GTE will have the largest self-healing network in the country," Smith said. "While other telephone companies are building SONET systems into their networks, GTE is clearly leading the way."
 GTE's agreement with AT&T represents the largest SONET contract to date for AT&T. The multimillion dollar contract includes the FT-2000 OC-48 system and the DDM-2000 OC-3 and OC-12 SONET Lightwave Systems, as well as its DACS family of products.
 The FT-2000, AT&T's flagship lightwave system, is the world's fastest lightwave transmission system.
 The SONET transmission equipment will be manufactured at AT&T's Merrimack Valley facility in Andover, Mass., recipient of the 1992 National Quality Award. The fiber optic cable is manufactured at AT&T's Atlanta Works, the world's largest fiber optic manufacturing facility.
 AT&T Network Systems is the worldwide manufacturer and marketer of network telecommunications products, including switching, transmission, cable, wireless and computer-based operations systems.
 SONET Background
 SONET -- an acronym for Synchronous Optical Network -- is a new worldwide standard for transmission of a wide variety of light signals over optical fiber. SONET allows different fiber systems to interconnect efficiently and to do so with an unprecedented level of accuracy and customer control.
 A SONET ring works by synchronizing clocks at switching centers throughout the ring. Individual signals are synchronized to these clocks before being sent on the network. Without SONET, there is no synchronization between individual signals.
 Without SONET, unsynchronized signals are bundled -- much like railroad cars are bundled to form trains. Bundling makes it easier to transport large numbers of signals simultaneously. At each stop, the "train" is broken into its individual components. Signals bound for that location are pulled from the bundle ("train") and delivered to the appropriate destination. Remaining signals are rebundled and sent back on the network to the next stop.
 With SONET, signals are still bundled. However, because they are synchronized to a common time recognized by all switching centers, the network can retrieve individual signals from a "moving train" rather than stopping the train, breaking it into individual pieces and rebundling the remainder.
 All parts of a SONET network have synchronous communication with all the other parts, thus improving network efficiency.
 For customers, a major benefit is faster transmission of data. For example, a single voice call typically is transmitted at 64,000 bits per second (bps). A typical high-speed data line transmits at 1.544 million bps.
 GTE's SONET rings will be capable of transmitting information between 155.52 million bps (OC-3 rate) and approximately 2.5 billion bps (OC-48 rate), the fastest digital transmission in the world.
 SONET also improves network reliability. GTE's "self-healing" SONET rings will maintain uninterrupted service if a cable is cut or equipment fails at any point along the ring. The SONET ring consists of a loop of multiple fiber optic cables. Signals are generated by customers at various points along the ring. SONET sends identical signals in opposite directions on the loop. One direction is a primary channel, while the other serves as a protect channel, or backup. If a disruption occurs at any point on the primary channel, the network automatically re-routes transmissions to the protect channel, allowing customers to enjoy uninterrupted service.
 This automatic recovery can occur in as little as 60 milliseconds.
 -0- 6/15/93
 /CONTACT: Roger Frizzell, 214-325-4710, or Kevin Beagley, 201-606-2587, both of AT&T Network Systems/


CO: AT&T; GTE California ST: California IN: TLS SU: PDT

LS-JB -- LA003 -- 1939 06/15/93 08:05 EDT
COPYRIGHT 1993 PR Newswire Association LLC
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 1993 Gale, Cengage Learning. All rights reserved.

Article Details
Printer friendly Cite/link Email Feedback
Publication:PR Newswire
Date:Jun 15, 1993
Words:744
Previous Article:CASEY'S HAS BEST YEAR EVER; QUARTERLY DIVIDEND INCREASED BY 25 PERCENT; ANNIVERSARY PROMOTION NOW UNDERWAY
Next Article:WESTERN WATER COMPANY REPORTS YEAR-END RESULTS; ANNOUNCES ODD-LOT BUYBACK PROGRAM
Topics:


Related Articles
WORLD'S FASTEST COMMUNICATION NETWORK PLANNED FOR NORTH CAROLINA
GTE TO BUILD FIBER-OPTIC HIGHWAYS IN 12 STATES; WILL PROVIDE ACCESS TO WORLD'S FASTEST DIGITAL TRANSMISSION SYSTEMS
GTE CALIFORNIA BEGINS CONSTRUCTION OF 'INFORMATION SUPERHIGHWAY,' GIVING ACCESS TO WORLD'S FASTEST DIGITAL TRANSMISSION SYSTEMS
GTE TO BUILD WORLD'S FASTEST DIGITAL TRANSMISSION SYSTEM AND LARGEST SELF-HEALING FIBER-BASED TELECOMMUNICATIONS NETWORK IN THE COUNTRY
GTE DEMONSTRATES INFORMATION SUPERHIGHWAY AT HIGH PERFORMANCE COMPUTING AND NETWORKING CONFERENCE.
GTE BELIEVES PUC'S COMPETITION PROPOSAL IS POSITIVE FOR COMPANY, CUSTOMERS, AND CALIFORNIA
GTE OPENS BUSINESS RAMP TO THE INFORMATION HIGHWAY
GTE NAMES TELLABS A PREFERRED VENDOR OF DIGITAL CROSS-CONNECT SYSTEMS

Terms of use | Copyright © 2016 Farlex, Inc. | Feedback | For webmasters