> On Oct 6, 2014, at 11:20 PM, Jay Hennigan <j...@west.net> wrote: > >> On 10/6/14, 8:41 AM, Owen DeLong wrote: >> >> Actually, in multiple situations, the FCC has stated that you are responsible >> when deploying a new unlicensed transmitter to insure that it is deployed in >> such a way that it will not cause harmful interference to existing >> operations. >> >> Using the same SSID of someone else who is already present would, IMHO, >> meet the test of “causing harmful interference”. > > Really? From a radio perspective if it isn't on the same RF channel?
In fact, yes. Since clients bind based on SSID and return to whatever channel the AP tells them to as a result, it's still an issue and still fits within the purview of RF regulation. Further, most of the channels somewhat overlap as it's a spread-spectrum technology, so the traditional concepts of "channel" don't actually completely apply (this is a good thing, actually). > I'm not so sure about that. It might cause interference to the revenue > stream, it could be considered a trademark infringement especially if it > leads to a fake "splash page" with the Marriott logo, and it could > certainly be used for malicious MITM purposes, but it doesn't cause > harmful interference to the existing user from the perspective of radio > frequency use. It does, actually, because the client may well rebind to the other AP thinking it's still part of the same ESS (since ESS are usually identified by sharing a common SSID). Owen