SONET

WHAT IS SONET? SONET stands for synchronized Optical NETwork. SONET/SDH is a synchronous fiber middle based behave order that includes inband network management and overlays the briefly existing asynchronous broad band network. SONET and SDH specify vulgar standards for interfaces and protocols which allows the equipment from different vendors to achieve complete functional interoperability in transmission data over fiber optic cables. WHY IS SONET important? SONET provides integrated, large bandwidth, high speed transport for electrical guides much(prenominal) as ATM, BISDN, SMDS and Frame Relay. This transport put also reduces bread and butter functions while providing greater flexibility, control and centralized management of the network. The SONET/SDH format can carry multiple bespeaks simulteanously using a change optically based transmission architecture at dwarfish cost than copper wires. direct Properties: SONET Frames: The basic SONET Fram e conglomerate body part is kn feature as STS-1 or Sychronous Transport Signal take 1. It has a basic set up rate of 8,000 frames/sec = 51.84Mb/s. The frame length is 9-rows by 90-columns of octets - join frame size 810 octets. The start three columns are transport overhead, while columns 4-90 are the SPE - Synchronous Payload Envelope with real(a) transport speed of 50.112Mb/s. SONET Layers in that location are 3 socio-economic classs that control the transport functions in the SONET frame.

The startle tier is the percentage layer that moves data across the media (OSI - 1). The back up layer is the Line layer which maps the payload into ! the electrical STS signal to send out to the peer terminating network elements (OSI - 2). The third layer is the racetrack layer which maps sevices into the preliminary payload prior to STS frame. (OSI - 3). Virtual Tributaries SONET framing incorporates dismount rate signals (less that DS3) into subdivisions of the STS payload. The VT (Virtual Tributary) functions as a separate signal with its own overhead bits. They can be locked or... If you want to cut a full essay, order it on our website: OrderCustomPaper.com

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