reverse power feeding - wikipedia, the free encyclopedia
TRANSCRIPT
-
8/18/2019 Reverse Power Feeding - Wikipedia, The Free Encyclopedia
1/1
Reverse power feedingFrom Wikipedia, the free encyclopedia
Reverse power feeding (RPF) is a new technology being standardized by ETSI[1] and the Broadband
Forum WT-318.[2] It allows sending power from the customer premises to a distribution point (DP), in
order to power the distribution point unit (DPU). The DPU includes typically a DSL access multiplexer
(DSLAM) that can support up to 24 users and an optical network terminator (ONT), which connects theDPU to a central office (CO) where the optical line terminator (OLT) is located. This topology as also
known as fiber to the distribution point (FTTdp). RPF is a critical technology for the upgrade of VDSL2
subscribers to the new G.fast standard, which has a maximum range (at high speeds) of 250m. Given
that only a small number of subscribers is located at a radius of 250m from a DPU, the number of DPUs
required to deploy G.fast infrastructure greatly increases, compared to VDSL2 and older xDSL
technologies. RPF reduces installation cost by removing the need to connect the DPU locally to the
power grid, as well as the need to monitor its power consumption with a smart meter.
Unlike PoE, which defines worst case power losses on a cable that is well defined, RPF defines a
maximum safety power envelope, and allows implementations to squeeze as much power as possiblefrom the line. This important difference comes from the fact that PoE was defined with enterprise
networks in mind (where the maker of the PD needs to interoperate with any PSE), while RPF is defined
for networks that are closed by nature, deployed by a service provider.
References
1. "ETSI TR 102 629 - Reverse Power Feed for Remote Nodes V2.1.2" (PDF). Access, Terminals, Transmission
and Multiplexing (ATTM). ETSI. March 2011. Retrieved 2014-11-05.
2. "Broadband Forum Technical Work in Progress". Broadband Forum. Retrieved 2014-11-05.
Retrieved from "https://en.wikipedia.org/w/index.php?title=Reverse_power_feeding&oldid=663792298"
Categories: Digital subscriber line
This page was last modified on 24 May 2015, at 12:11.Text is available under the Creative Commons Attribution-ShareAlike License; additional termsmay a pply. By using this site, you agree to the Terms of Use and Privacy Policy. Wikipedia® is aregistered trademark of the Wikimedia Foundation, Inc., a non-profit organization.
https://www.wikimediafoundation.org/https://wikimediafoundation.org/wiki/Terms_of_Usehttps://wikimediafoundation.org/wiki/Privacy_policyhttps://en.wikipedia.org/wiki/Wikipedia:Text_of_Creative_Commons_Attribution-ShareAlike_3.0_Unported_Licensehttps://en.wikipedia.org/wiki/Help:Categoryhttps://en.wikipedia.org/wiki/Category:Digital_subscriber_linehttps://www.broadband-forum.org/technical/technicalwip.phphttps://en.wikipedia.org/wiki/Local_area_networkhttps://en.wikipedia.org/wiki/PoEhttps://en.wikipedia.org/wiki/G.fasthttps://en.wikipedia.org/wiki/VDSL2https://en.wikipedia.org/wiki/Telephone_exchangehttps://www.wikimediafoundation.org/https://wikimediafoundation.org/wiki/Privacy_policyhttps://wikimediafoundation.org/wiki/Terms_of_Usehttps://en.wikipedia.org/wiki/Wikipedia:Text_of_Creative_Commons_Attribution-ShareAlike_3.0_Unported_Licensehttps://en.wikipedia.org/wiki/Category:Digital_subscriber_linehttps://en.wikipedia.org/wiki/Help:Categoryhttps://en.wikipedia.org/w/index.php?title=Reverse_power_feeding&oldid=663792298https://www.broadband-forum.org/technical/technicalwip.phphttp://www.etsi.org/deliver/etsi_tr/102600_102699/102629/02.01.02_60/tr_102629v020102p.pdfhttps://en.wikipedia.org/wiki/Local_area_networkhttps://en.wikipedia.org/wiki/PoEhttps://en.wikipedia.org/wiki/G.fasthttps://en.wikipedia.org/wiki/VDSL2https://en.wikipedia.org/wiki/Telephone_exchangehttps://en.wikipedia.org/wiki/DSL_access_multiplexerhttps://en.wikipedia.org/wiki/Broadband_Forumhttps://en.wikipedia.org/wiki/ETSI