The FTTC NCD's in the customer premise reverse power the DPU in the
street(curb). Up to 4 premise connected to the DPU can share the reverse
powering of the DPU to allow lower power draw from each user's NTD and also
providing a form of redundancy for the users connected to it. So I'd hazard a
guess it's that at a minimum 4 lots of copper, 4 NCD's that are reverse
powering the DPU so more risk to everyone connected/more chance at lightning
impacting additional houses or users.
Jarryd Sullivan
On 21/1/21, 9:55 am, "AusNOG on behalf of Karl Auer"
<ausnog-boun...@lists.ausnog.net on behalf of ka...@biplane.com.au> wrote:
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 (ka...@biplane.com.au)
http://www.biplane.com.au/kauer
GPG fingerprint: 2561 E9EC D868 E73C 8AF1 49CF EE50 4B1D CCA1 5170
Old fingerprint: 8D08 9CAA 649A AFEF E862 062A 2E97 42D4 A2A0 616D
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