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Reverse power feeding (RPF) is a technology being standardized by ETSI and the Broadband Forum in 2020. 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 the DPU to a central office (CO) where the optical line terminator (OLT) is located. This topology is 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 req

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  • Reverse power feeding (RPF) is a technology being standardized by ETSI and the Broadband Forum in 2020. 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 the DPU to a central office (CO) where the optical line terminator (OLT) is located. This topology is 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 req (en)
  • Reverse power feeding (RPF) è una tecnologia in corso di standardizzazione presso lo ETSI e il TR-301.Prevede l'invio di potenza elettrica dai dispositvi installati presso l'utente finale verso il distribution point (DP), permettendo così di alimentare la distribution point unit (DPU) remotamente. La DPU normalmente include un (DSLAM) che può supportare fino a 24 utenti e un (ONT) che collega la DPU al (CO) dove è alloggiato il terminatore di linea ottica (optical line terminator, OLT). Questa topologia è anche conosciuta come fiber to the distribution point (FTTdp). (it)
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  • Reverse power feeding (RPF) is a technology being standardized by ETSI and the Broadband Forum in 2020. 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 the DPU to a central office (CO) where the optical line terminator (OLT) is located. This topology is 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 possible from the line. This important difference comes from the fact that PoE was defined with enterprise networks in mind (where the maker of the powered device (PD) needs to interoperate with any power sourcing equipment (PSE)), while RPF is defined for networks that are closed by nature, deployed by a service provider. (en)
  • Reverse power feeding (RPF) è una tecnologia in corso di standardizzazione presso lo ETSI e il TR-301.Prevede l'invio di potenza elettrica dai dispositvi installati presso l'utente finale verso il distribution point (DP), permettendo così di alimentare la distribution point unit (DPU) remotamente. La DPU normalmente include un (DSLAM) che può supportare fino a 24 utenti e un (ONT) che collega la DPU al (CO) dove è alloggiato il terminatore di linea ottica (optical line terminator, OLT). Questa topologia è anche conosciuta come fiber to the distribution point (FTTdp). RPF è una tecnologia di importanza critica nell'aggiornamento delle reti basate su VDSL2 verso il nuovo standard G.fast che ha una portata massima (per alte velocità di trasmissione) di 250 metri.Considerando che solo una piccola parte degli utenti si trova nel raggio di 250m da un DPU, il numero totale di DPU richiesti per realizzare l'infrastruttura G.fast è molto superiore rispetto alla tecnologia VDSL2 e, ancora di più, rispetto a tecnologie xDSL più vecchie.RPF rideuce i costi di installazione eliminando la necessità di collegare la DPU alla rete elettrica, insieme alla necessità di controllare i consumi con uno smart meter. Diversamente dalla tecnologia PoE — che stabilisce perdite di potenza su un cavo ben definite — RPF permette implementazioni che consentono di ricavare quanta più potenza possibile dalla linea. Questa importante differenza deriva dal fatto che PoE è stata definita basandosi sulla LAN (dove il produttore del PD deve potersi interfacciare con qualsiasi PSE), mentre RPF è stata concepita per reti che sono chiuse per definizione perché realizzate da una azienda fornitrice di servizi di telecomunicazioni. (it)
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