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Frame format of fiber optic communication data

All frames are transmitted in standard IEEE 802. 2 header set to the assigned global SAP value for SNAP (decimal 170). This tutorial provides an overview of SDH/SONET, covering basics, HDLC framing, terminologies, rates, and the SONET STS-1 SDH Frame. SONET (Synchronous Optical Network) and SDH (Synchronous Digital Hierarchy) serve the same purpose: communication over optical fiber links. At low transmission rates, data can also be. SONET is the North American standard (termed OC-N) defined in Telcordia GR-253-CORE and ANSI T1. Higher-level signals are integer multiples of STS-1, creating the family of STS-N. Synchronous optical network (SONET) is a standard for optical telecommunications transport formulated by the Exchange Carriers Standards Association (ECSA) for the American National Standards Institute (ANSI), which sets industry standards in the U. for telecommunications and other industries.