SDH (Synchronous Digital Hierarchy) is a standard for telecommunications transport formulated by the International Telecommunication Union (ITU), previously called the International Telegraph and Telephone Consultative Committee (CCITT). SDH was first introduced into the telecommunications network in 1992 and has been deployed at rapid rates since then. It's deployed at all levels of the network infrastructure, including the access network and the long-distance trunk network. It's based on overlaying a synchronous multiplexed signal onto a light stream transmitted over fibre-optic cable. SDH is also defined for use on radio relay links, satellite links, and at electrical interfaces between equipment.
Did you find this white paper useful?
24 out of 50 users found this white paper useful
Related white papers
Accelerating Secure Business Applications Podcast
Download this Riverbed Connect podcast and listen as Bob Gilbert discusses with Mark Day, Riverbed's Chief Scientist, the details involving SSL encryption, SSL's impact on WAN optimization, and new wide-area...
Riverbed Raises the Ante Again in WDS with RiOS 5.0
Do your remote workers have a desire for higher performance computing? In this Feature Brief, learn how Steelhead appliances from Riverbed, with the enhanced RiOS 5.0 operating system, provide a...
Utilizing Basic Rate ISDN in a LAN Fax Application
ISDN (Integrated Services Digital Network), is a standard communications network around the world for digital data, voice and video communication. ISDN BRI provides two 64 Kbps bearer channels and a...
Why 802.11 Should Stay Indoors
An Explanation of Problems Surrounding the Use of 802.11b Compliant Radio Products for Outdoor Point-to-Multipoint Communications and Metropolitan Area Networks Currently, a number of vendors are promoting 802.11b compliance in their...
Comparative Approaches in Implementing Wide Area Satellite Networks
Tremendous growth has occurred in the assimilation of the Internet into everyday business operations over the past 18 months. Furthermore, greater demands have been placed on traditional LAN/WAN connectivity methods for higher...
Transparent LAN Service (TLS)
Transparent LAN service enables service subscribers to seamlessly integrate their wide area network (WAN) into their local area networks (LANs) through high-speed interconnection, quality of service, transparent performance characteristics, and...
Transparent LAN Service as an Alternative to Frame Relay
Transparent LAN service is gaining ground as a popular alternative to frame relay. Transparent LAN service is a high speed, LAN interconnection service that hides the complexity associated with WAN...
