I may have missed something important. A vendor said that different PON
systems could co-exist, and I took that at face value.
Do you always need a filter at the ONT for that to work?
On 10/20/2020 3:56 PM, [email protected] wrote:
Sent: Tuesday, October 20, 2020
From: "Adam Moffett" <[email protected]>
Subject: [AFMUG] GPON - alternate wavelengths
Do any vendors sell PON optics on non-standard wavelengths?
Not as far as I know. I recall an old press release [1], but I don't recall
anything coming of it.
The reason standard wavelengths are used is because, well, they are standard
and any other wavelengths would not have scale benefits.
[1]
https://www.lightwaveonline.com/optical-tech/article/16671134/source-photonics-unveils-cwdm-gpon-olt-and-ont
I could just overlay a second XGPON network on a different wavelength?
If you did you'd have problems on the client side. The ONU would either have
to be custom made to be wavelength selective or you'd have to install the
correct wavelength filters at each drop.
Doable in theory, but expensive.
What you can do is transport multiple PONs over a single fiber using CWDM
wavelengths. However, you need to do an OEO conversion at the remote side back
to standard wavelengths and have separate PON trees for each wavelength.
Jared
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