Openreach FTTP ONT: Difference between revisions

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[[Category:Routers]]

[[File:Openreach_ZyXEL_ONT.jpg|thumb|2.5G Openreach (ZyXEL) ONT from 2026 - LOS light is red, showing a fault on the fibre path]]

[[File:Fttp-ont-pon.jpg|thumb|(Newer) Openreach single port ONT - Lights show all good]]

[[File:Older_ONT.png|thumb|(Older) Openreach ONT - Lights show all good]]

[[File:Ont-ports.png|thumb|(Newer) Openreach single port ONT ports]]

[[File:ONT-side.jpg|thumb|(Older) Openreach ONT, powered off!]]

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* Where provided, the battery has a short warranty, and should be maintained by the end user, however, the battery is to keep the unit powered so that the TEL ports can be used during a power outage - we don't use the TEL ports, so you will want to make other arrangements for using a phone during a power outage - eg a mobile phone. See: [[999_and_faults]]

* At least newly installed BT ONTs support Baby Jumbo frames (see [[MTU]])

* Openreach have a [https://www.openreach.co.uk/cpportal/content/dam/cpportal/public/images-and-documents/home/help-and-support/sins/documents/Optical_Network_Terminals_ONTs_v1_1.pdf specification document].

== Openreach ONT LED Status ==

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== External links ==

* [https://www.openreach.com/content/dam/openreach/openreach-dam-files/images/news-and-opinion/articles/2018/02/ONT%20Factsheet.pdf 1+1 ONT and Enclosure Factsheet]

=Outdoor Junction box=

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This is a passive device, doesn't require power, and is just used to connect the two fibres together. The photo shows both a Brown CityFibre unit and a Grey Openreach unit.

= Download Committed Rate =

BT's FTTP service is a domestic-grade service and the technology uses a shared path - multiple premises will use the same fibres within the network and so there is contention. Usually this does not lead to congestion - if it does then we'll take that on as a fault. BT Wholesale to specify the ''Minimum ‘Best Efforts’ Downstream Throughput'' for services as is shown below, this said, BT also state that in reality services typically operate closer to the purchased speed for the majority of the day.

{| class="wikitable"

|-

! Service

! Minimum ‘Best Efforts’ Downstream Throughput (Mb/s)

|-

! 115/20

| 60

|-

! 160/30

| 95

|-

! 330/50

| 165

|-

! 550/75

| 195

|-

! 1000/115

| 195

|}