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Words near each other
・ Ethernet
・ Ethernet Active Line Access
・ Ethernet Alliance
・ Ethernet Automatic Protection Switching
・ Ethernet Configuration Testing Protocol
・ Ethernet crossover cable
・ Ethernet Exchange
・ Ethernet extender
・ Ethernet flow control
・ Ethernet frame
・ Ethernet Global Data Protocol
・ Ethernet hub
・ Ethernet in the first mile
・ Ethernet over coax
・ Ethernet over copper
Ethernet over PDH
・ Ethernet over PDH over SONET/SDH
・ Ethernet over SDH
・ Ethernet over twisted pair
・ Ethernet over USB
・ Ethernet physical layer
・ Ethernet Powerlink
・ Ethernet Private Line
・ Ethernet Ring Protection Switching
・ Ethernet Train Backbone
・ Ethernet Virtual Private LAN
・ Ethernet Virtual Private Tree
・ EtherNet/IP
・ Ethernut
・ Etherow Country Park


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Ethernet over PDH : ウィキペディア英語版
Ethernet over PDH
Ethernet over PDH or EoPDH is one of many techniques that provided Ethernet connectivity over non-Ethernet networks. Specifically, EoPDH is a standardized methodology for transporting native Ethernet frames over the existing telecommunications copper infrastructure by leveraging the established PDH transport technology. EoPDH is one of several Ethernet transport technologies that enables Telecommunication Service Providers to offer "Carrier Ethernet" services. Also commonly used as a means of connecting businesses to a Metro Ethernet network.
EoPDH is based on a collection of technologies and standards that allow telecommunications Carriers to make use of their extensive networks of legacy PDH and SONET/SDH (Synchronous Digital Hierarchy) equipment to provide new Ethernet services. In addition, the collection of EoPDH standards provide for interoperability and the gradual migration of Carriers to Ethernet networks.
== General Description ==
EoPDH is a standardized methodology for transporting native Ethernet frames over PDH links such as T1, E1, or DS3. The technologies used in EoPDH include GFP frame encapsulation, Ethernet Mapping, Virtual Concatenation, Link Capacity Adjustment Scheme, and Management Messaging ((OAM )). Common practices in EoPDH equipment also include the tagging of traffic for separation into virtual networks, prioritization of user traffic, and a broad range of higher-layer applications such as DHCP servers and HTML user interfaces.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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