EoPoS

Ethernet over PDH over SONET/SDH (EoPoS) is one of many techniques that provided Ethernet connectivity over non-Ethernet networks. EoPoS is a standardized methodology for transporting native Ethernet frames over the existing telecommunications optical infrastructure by leveraging both the established PDH and SONET/SDH transport technologies.

General Description

EoPoS is a standardized methodology for transporting native Ethernet frames over a SONET/SDH network, by first mapping into one or more PDH tributaries such as T1, E1, or DS3. The tributaries can then be dropped from a legacy ADM, delivered to the customer premise, and the PDH links resolved back to an Ethernet connection by a piece of equipment supporting EoPDH.

The technologies used in EoPoS include GFP frame encapsulation, Ethernet Mapping, Virtual Concatenation, Link Capacity Adjustment Scheme, and Management Messaging ( [http://www.rad.com/RADCnt/MediaServer/21878_EthOAM_WP.pdf OAM] ). Common practices in EoPoS equipment also include the tagging of traffic for separation into virtual networks, prioritization of user traffic.

History

Related Standards

Standards from the ITU-T:
* ITU-T G.7041 Generic Framing Procedure
* ITU-T G.7042 Link Capacity Adjustment Scheme
* ITU-T G.7043 Virtual concatenation of plesiochronous digital hierarchy (PDH) signals
* ITU-T G.8040 GFP frame mapping into Plesiochronous Digital Hierarchy (PDH)
* ITU-T Y.1730 Requirements for OAM functions
* ITU-T Y.1731 OAM functions and mechanisms

The Use of EoPoS

.

ee also

* Ethernet over PDH
* Ethernet over SONET and Ethernet over SDH
* Packet_over_SONET/SDH
* [http://www.maxim-ic.com/CarrierEthernet Carrier Ethernet Integrated Circuits from Dallas Semiconductor]

External links

* [http://www.elecdesign.com/Articles/Index.cfm?ArticleID=15219 Electronic Design Article]
* [http://www.maxim-ic.com/appnotes.cfm/appnote_number/4102/ EoPoS White Paper]
* [http://www.maxim-ic.com/appnotes.cfm/appnote_number/3849/ EoPDH White Paper]
* [http://www.rad.com/RADCnt/MediaServer/18551_Ethernet.pdf EoPDH Equipment]