SONET

WHAT IS SONET? SONET stands for synchronized Optical NETwork. SONET/SDH is a synchronous fiber opthalmic based hold order that includes inband network management and overlays the in brief existing asynchronous broad band network. SONET and SDH specify common standards for interfaces and protocols which allows the equipment from different vendors to achieve complete functional interoperability in convey data over fiber optic cables. WHY IS SONET of import? SONET provides integrated, large bandwidth, high speed transport for electrical guides much(prenominal) as ATM, BISDN, SMDS and Frame Relay. This transport do also reduces bread and cover functions while providing greater flexibility, control and centralized management of the network. The SONET/SDH format can carry multiple bespeaks simulteanously using a simplify optically based transmission architecture at undersize cost than copper wires. transportation system Properties: SONET Frames: The basic SONET Frame convoluted body part is kn have got 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 - thorough frame size 810 octets. The start three columns are transport overhead, while columns 4-90 are the SPE - Synchronous Payload Envelope with actual transport speed of 50.112Mb/s. SONET Layers in that location are 3 levels that control the transport functions in the SONET frame.

The startle level is the part layer that moves data across the media (OSI - 1). The back up layer is the Li ne layer which maps the payload into the ele! ctrical STS signal to orchestrate 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 get off 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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