Synchronous Optical NETwork


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Synchronous Optical NETwork

(networking)
(SONET) A broadband networking standard based on point-to-point optical fibre networks. SONET will provide a high-bandwidth "pipe" to support ATM-based services.

The SONET standard will establish a digital hierarchical network with a consistent worldwide transport scheme. SONET has been designed to take advantage of fibre, in contrast to the plain old telephone system which was designed for copper wires.

SONET carries circuit-switched data in frames at speeds in multiples of 51.84 megabits per second (Mbps) up to 48 * 51.84 Mbps = 2.488 gigabits per second. Since SONET uses multiple channels to transmit data, each SONET frame can be considered to be a two-dimensional table of bytes that is 9 rows high and 90 columns deep. For every OC-n level, SONET can transmit n number of frames at a given time. Groups of frames are called superframes.

SONET is the American version of SDH.

[Wulf Losee; Corporate Computing 8.92; STACKS; LAN Magazine 10.93].
References in periodicals archive ?
Omnia Communications, Inc., Marlborough, Mass., a new provider of next-generation access solutions for the telecom industry, has introduced the AXR 500, the first next-generation Add/Drop Multiplexer (ADM) for carriers' Synchronous Optical Network (SONET)-based metropolitan area networks.
The Florida Hospital network provided by Sprint will use a synchronous optical network (SONET) that is capable of carrying and processing large amounts of data using asynchronous transfer mode (ATM) technology.
In Missouri and Illinois we ve created a robust, 6,000-mile network that relieves fiber exhaust, upgrades on SONET (Synchronous Optical Network) infrastructure and brings sometimes unprecedented services to the 59 counties funded by the grant.
Details of two enhancements to the Synchronous Optical Network (SONET) service portfolio have been revealed by US communications holding company AT&T Inc (NYSE:T), enabling wholesale and retail business customers to converge voice, data and video capabilities over Internet Protocol (IP)-enabled networks.
Compatible with Synchronous Optical Network (SONET) and other communication equipment that operates at 9.95 Gbps, as well as 10 Gigabit Ethernet data communications equipment that operates at 10.3 Gbps.
Media converters support multiple network types and data rates, including 10, 100, 10/100, 10/100/1000 Ethernet, OC-3, OC-12, OC-48, T-I, T-3, asynchronous transfer mode, synchronous optical network and serial technologies.
These Time Division Multiplexing (TDM) network architectures were built mainly around a 3-tier Synchronous Optical Network (SONET) ring topology.
Such instruments often include the ability to create masks or limit lines for accepted standards, such as limit lines for synchronous optical network (SONET) or synchronous digital hierarchy (SDH) systems.
AT&T said it will provide Synchronous Optical Network (SONET) ring service for Republic Services, giving it a self-healing network architecture which protects critical applications from being disrupted or degraded in quality due to loss of signal or transmission impairment.
This article summarizes much of the material that has already been published, but explains it in an understandable way to the reader who may be considering the synchronous optical network (SONET) for the first time.
In addition AT&T's ACCU-Ring Network Access Service, which consists of a private Synchronous Optical Network (SONET) ring which consolidates network traffic, will be deployed by UniFirst at its headquarters in Wilmington, Mass.
Further redundancy is built in at the entry point from the Verizon synchronous optical network (SONET) rings.

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