The SF Bay Area Rapid Transits System) turned off cellphones in 2011. http://www.sfgate.com/news/article/BART-admits-halting-cell-service-to-stop-... and the FCC emphasis that future actions "recognizes that any interruption of cell phone service poses serious risks to public safety" http://www.sfgate.com/bayarea/article/BART-cell-phone-shutdown-rules-adopted... On 10/7/2014 6:36 PM, Valdis.Kletnieks@vt.edu wrote:
On Tue, 07 Oct 2014 20:10:44 -0500, Jimmy Hess said:
The only way to legally block cell phone RF would likely be on behalf of the licensee ---- In other words, possibly, persuade the cell phone companies to allow this, then create an approved "special" local cell tower all their phones in the same building will by default connect to in preference to any other, which will also not receive any calls or messages or allow any to be sent. I wonder how many customers the cell phone company will attract by doing that.