On Wednesday, 12 August 2020 10:14:05 UTC+1, The Natural Philosopher wrote:
On 12/08/2020 07:55, Andy Burns wrote:
The Natural Philosopher wrote:

no.
Not according to what wiki says. Its all wavelength division.

So the openreach chappie keeps 32 "flavours" of ONT on his van to cope
with different lambdas does he?

In the same way that a single radio tuner can receive the whole VHF
band, no.

Scan all frequencies till the one that is transmitting your MAC, or
whatever, is found..

In case anyone is interested, this is all defined in ITU-T G.984.3
which can be downloaded free of charge from various sites.

Section 5.5 of that document has the title:

"G-PON time division multiplexing architecture"

The way in which uplink data frames are allocated transmission times,
including compensation for varying propagation delay in the fibre with
distance to avoid collisions is all defined.
The BT residential service only uses wavelength division to separate
the uplink from the downlink on a single fibre.

John