GPON Optical Levels

Colton Conor colton.conor at
Mon Oct 12 15:57:58 UTC 2015

Here is the link to the attachment as it looks like the list does not allow
uploading attachment:

On Mon, Oct 12, 2015 at 10:47 AM, Colton Conor <colton.conor at>

> We are deploying our first GPON network, and are trying to get a sense of
> what is a good optical level per ONT. The equipment install guide says the
> following:
> Measure the levels of the 1550 dBm and 1490 dBm receive optical inputs
> using
> an optical power meter. The input range should be between -27.0 dBm to -8
> dBm.
> Attached are the measurements I can see and graph from the ONT side.
> Trying to get a sense of what range we would graph as good
> (green) measured within the clear, what we could consider yellow as working
> but out of optimal range, and what we could consider poor (red) range.
> What about the Laser Bias Current, Optics Module Voltage, and Optics
> Module temperature?

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