Definitions for "Synchronous Digital Hierarchy"
Related Terms:
Sdh, Sonet, Synchronous optical network, Oc-1, Pdh, Optical carrier, Stm-1, Sts-1, Oc-3, Stm, Oc3, Oc-24, Oc-192, Oc-12, Oc-48, Fiber channel, Oc-n, Oc12, Asynchronous transfer mode, Fibre, Fibre channel, Time division multiplexing, Inverse multiplexing, Atm - asynchronous transfer mode, Inverse multiplexer, Time-division multiplexing, Synchronous communications, Fiber-optic, Full duplex, Bisdn, Bandwidth-on-demand, Tdm, Ds3 , Synchronous transmission, Dwdm, Dense wavelength division multiplexing, Ds-3, Broadband isdn, Data communications, Duplex , Atm, Bursty, Parallel transmission, Broadband, Preamble, Full-duplex, Fots, Asynchronous mode, Ds1, Fiber optic
The international standard for transmitting digital information over optical networks. Term used by ITU to refer to SONET.
the ITU–T–defined world standard of transmission whose base transmission level is 52 Mbps (STM–0) and is equivalent to SONET's STS–1 or OC–1 transmission rate; SDH standards w
The international form of SONET. Often used synonymously with SONET, but not exactly the same. SDH is built on fundamental building blocks of 155.520 Mbps.
SDH is an international standard for synchronous data transmission over fiber optic cables. The North American equivalent of SDH is SONET. SDH defines a standard rate of transmission at 155.52 Mb/s, which is equivalent to a rate of OC-3.
SDH defines a number of "containers," each corresponding to an existing plesiochronous rate (1.5, 2, 6, 34, 45 and 140 Mbps). Each "container" has some control information known as "Path Overhead" (POH) added to it. The POH allows the network operator to achieve end-to-end path monitoring. Together the container and the path overhead form a "Virtual Container" (VC) in Europe or "Virtual Tributary" (VT) in North America.
a method of digital transmission where the data is packed in containers which are synchronised in time enabling relatively simple multiplexing and de-multiplexing at the transmitting and receiving ends.
A high speed transmission technology which uses optical fibres for establishing circuits (a.k.a. connections) with dedicated bandwidth between end nodes. The speed of SDH connection can range from 155 Mbit/s up to 40 Gbit/s.
The international version of SONET.
See SDH.
A standard technology for synchronous data transmission on optical media. It is the international equivalent of Synchronous Optical Network.
This is a method of digital transmission. It exists where the data is packed in containers. These are then synchronised in time, thus enabling relatively simple multiplexing and also demultiplexing at the receiving and transmitting ends.