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Synchronous Digital Hierarchies

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  • Standardized digital transmission rates for the synchronous digital hierarchy (SDH), the synchronous optical network (SONET), and the optical carrier (OC) hierarchy — ▪ Table Standardized digital transmission rates for the synchronous digital hierarchy (SDH), the synchronous optical network (SONET), and the optical carrier (OC) hierarchy* SDH system SONET system OC level transmission rate in megabits per… …   Universalium

  • Digital Transmission Hierarchies — In telecommunications, the two following distinct digital hierarchical structures exist: Plesiochronous Digital Hierarchy (PDH) Synchronous Digital Hierarchy (SDH) This article related to telecommunications is a stub. You can help Wikipedia by… …   Wikipedia

  • Public switched telephone network — The public switched telephone network (PSTN) is the network of the world s public circuit switched telephone networks. It consists of telephone lines, fiber optic cables, microwave transmission links, cellular networks, communications satellites …   Wikipedia

  • T-carrier — In telecommunications, T carrier, sometimes abbreviated as T CXR , is the generic designator for any of several digitally multiplexed telecommunications carrier systems originally developed by Bell Labs and used in North America, Japan, and Korea …   Wikipedia

  • Optical Carrier —    Abbreviated OC. A set of Synchronous Optical Network (SONET) hierarchies that define how digital signals are multiplexed over fiber optic cable. SONET is the physical layer standard used by telephone carriers to connect longdistance services.… …   Dictionary of networking

  • Usenet — A diagram of Usenet servers and clients. The blue, green, and red dots on the servers represent the groups they carry. Arrows between servers indicate newsgroup group exchanges (feeds). Arrows between clients and servers indicate that a user is… …   Wikipedia

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