First of all, thanks for all to gave time to write an opinion.
When I wrote, I gave partial informations: a good part of the link was CAT6 (maybe 40 %), but with lightning protection on both side.
But what I wanted was direct experience, not hint.
We didn't have time to put fiber optic, we cannot put repeater (this was an outdoor setup). The only other way -with what we had- was a wireless link, on which the HDMI extenders didn't work.
Well, now I can say that a temporary ethernet link shorter than 200 meters, between CRS3xx and RB2011, and if 100 Mbps are enough, is possible, but at own risk (as ingdaka's experience is really different).
And that it is a good idea to have in stock two S+RJ10.
the marvell phys in the crs3xx series support up to 175m as i recon
I read you only today, two days after. Good, ok. Did you hear or read it? I read specs, but I can't find it.
Maximum is really about 100 metres then collision detection mechanisms "break" the link.
Well, this is not a problem: on a full duplex link, CD is deactivated
For what I saw, it is rather a compromise between transmit power and sensitivity.