The Optical Line Termination or Optical Network Termination (ONT) Device is the box which will be installed by Openreach inside the premise.
There are different types and the ONT provided is dependent on the electronics deployed in the serving exchange. The ONT will be fixed to a wall within 1m of a fixed power socket. More information can be found on this PDF from Openreach. https://www.openreach.co.uk/cpportal/content/dam/cpportal/public/images-and-documents/home/help-and-support/sins/documents/SIN_506.pdf
Type 3 - 1+0 ONT
This is currently the default type for new installations.
- 1 data port
- H x W x D - 89mm x 82mm x 27mm
Type 4 - 4+0 'Multiport' ONT
This is a new style multiport ONT which is currently the default type for some specific site classifications (as determined by Openreach). Note that 4+0 ONTs are not available in all locations.
- 4 data ports
- Specifications: tbc
Multiport ONT / Ordering a 2nd FTTP Service
- Where there is a spare data port on an existing ONT, this can be remotely activated to provide a second service.
- If there are no spare ports on an existing single port ONT and the Existing ONT flag on the BT checker = N, a new single port ONT can be ordered if the New ONT flag = Y. Where the New ONT flag = N, it may still be possible to order a second ONT.
- If there are no spare ports on an existing single port ONT and the Existing ONT flag on the BT checker = Y, Openreach''s default behaviour is to swap the single port ONT to a new multiport ONT which will hold both services. If CPs are not happy with a swap, they will be able to request a 2nd separate single port ONT to be installed instead if the New ONT flag on BT checker = Y. Note this option is targeted for release in May 2022.
Implications of an ONT swap:
- The existing service on the single port ONT will be moved over to the new multiport ONT along with the provision of the new service. Hence two data ports will be utilised on the multiport ONT. The existing service will be provisioned on Port 1 and the new service on Port 2.
- The default position for these installs is that the engineer will fit the new multiport ONT exactly where the existing single port ONT is. The one aspect where there is flexibility is that the engineer can arrange DEK (additional Cat 6 cabling) from the new ONT to onward connect to a different CP router location if needed to complete the second connection.
- There will be a break in service (30-60 minutes) whilst the existing service is moved across. The engineer will advise the existing end customer on site when the existing service is being disconnected.
- Once provision has been completed the inventory will be updated with the new ONT details (same ONT Reference, new Serial Number) and these should be visible on BT checker from the next day.
