Remember this is Ethenet not VDSL so signal levels are higher and noise rejection a lot better. A couple of feet away should be reasonable and if you went for screened Cat5e and properly earthed it there is a good chance it would work.
The only complication is that you are on a power supply pole - if a power cable breaks and drops onto the data cable, you may have a problem but telephony and power on the same poles is acceptable now. There are guidelines for it which you could search for.
M H C
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