I believe the OP already has Plusnet FTTP from port two of his ONT, and BT Retail FTTP and FVA from the same router.

He is going to cease the retail offering, retain the Plusnet FTTP, and was asking if he could just have the FVA on it�s own.

I suspect Plusnet do not offer an FVA service to accompany their FTTP offerings.

Yeah plusnet do not offer fva,
i want to keep fva line rental only with BT to retain my landline number, and keep plusnet operating on port 2 of the ont, with port 1 being taken out of service as bt retail broadband will be ceased..

so i can keep fva line rental only without infinity attached? so calls only no broadband over fttp?

They certainly offer it as a stand alone product.

Zarjaz

Technically they just configure the splitter and ONT to direct different wavelengths to each port . So a 4 port can handle up to 4 separate wavelengths (if they are not used for other customers).

In theory you could get all 32 wavelength done 1 fibre but that would negate the previous splitter and defeat the object of GPON.

AIUI GPON uses two frequencies one for downstream and one for upstream. For downsteam, the ONT takes the bits that it needs and passes them to the correct ethernet ports. For upstream the ONT has to send a packet of data at the correct time so that it does not collide with data from other ONTs. The exact timing depends on the distance a particular ONT is from the head end. See

In reply to a post by kitcat:

Zarjaz

Technically they just configure the splitter and ONT to direct different wavelengths to each port . So a 4 port can handle up to 4 separate wavelengths (if they are not used for other customers).

In theory you could get all 32 wavelength done 1 fibre but that would negate the previous splitter and defeat the object of GPON.

My understanding of PON was the splitter splits the data to all 32 split fibres, so if "ABCDEF" was sent into the splitter all 32 split fibres will have "ABCDEF" on them.
I think the wavelengths are different for sending and receiving and that's it.

I think it uses a form of TDM (Time-division multiplexing) when sending and receiving data.

And the ONT even though its possible to receive all data it can only decode data that is meant for it.

And if they wanted to supply two FTTP connections to a single 4 Port ONT they just configure the ONT settings (over fibre) and send the data and the ONT will decode the data that is intended for it.

But like I said this is my understanding of it, so some of it might be incorrect.

Paul

Thank you kitcat - (and damn these matinee idol good looks)

In reply to a post by PaulKirby:

I think it uses a form of TDM (Time-division multiplexing) when sending and receiving data.

And the ONT even though its possible to receive all data it can only decode data that is meant for it.

That's all correct.

I believer the TDM in the upstream direction is pretty clever: the OLT allocates the upstream timeslots, but takes into account the different times delays over the different fibre paths to each ONT.

so does that mean you could have 4 1000/220 lines installed on one of these 4 port boxes and they would all run over the same fibre?

In reply to a post by Robin1989:

so does that mean you could have 4 1000/220 lines installed on one of these 4 port boxes and they would all run over the same fibre?

Yes, that is orderable.
You'll hit congestion for sure, but each 1000/220 will be guaranteed 330/110 at the Openreach level.