[AusNOG] Lightning and FTTC - is it really this bad?

Karl Auer kauer at biplane.com.au
Thu Jan 21 11:24:21 EST 2021

On Thu, 2021-01-21 at 11:04 +1100, Jrandombob wrote:
> Even in a high lightning area, as Damien said previously, if anything
> FTTC ought to be LESS susceptible (assuming of course the devices are
> well designed) to lightning owing to the shorter cable runs.

There are two ways in to the CPE - the FTTC connection and the power
supply to the CPE.

The FTTC connections are themselves powered at the curb, and so may be
a conduit for spikes into CPE.

The likelihood of the cable run from the curb to the CPE getting hit
directly is probably very low, but the likelihood of the power grid
getting hit and sending a spike down the line to either the curb
equipment and thence to the CPE or to the CPE directly is unchanged.
Actually it's probably higher, given the greater number of powered
devices in the network.

Regards, K.

Karl Auer (kauer at biplane.com.au)

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