There is a provision in the regulations somewhere that allows underground/tunnel transmitters on licensed bands without a license, provided certain power limits are honoured outside of the tunnel. Perhaps they are operating under these provisions?
K On 10/08/2014 02:11 PM, William Herrin wrote: > On Wed, Oct 8, 2014 at 4:37 PM, joel jaeggli <joe...@bogus.com> wrote: >> On 10/8/14 1:29 PM, Larry Sheldon wrote: >>> On 10/8/2014 08:47, William Herrin wrote: >>>> BART would not have had an FCC license. They'd have had contracts with >>>> the various phone companies to co-locate equipment and provide wired >>>> backhaul out of the tunnels. The only thing they'd be guilty of is >>>> breach of contract, and that only if the cell phone companies decided >>>> their behavior was inconsistent with the SLA.. >>> >>> OK that makes more sense than the private answer I got from Roy. I >>> wondered why the FCC didn't take action if there was a license violation. >> >> http://www.nytimes.com/2012/03/03/technology/fcc-reviews-need-for-rules-to-interrupt-wireless-service.html?_r=0 > > From the article: "Among the issues on which the F.C.C. is seeking > comment is whether it even has authority over the issue." > > Also: "The BART system owns the wireless transmitters and receivers > that allow for cellphone reception within its network." > > I'm not entirely clear how that works. > > Regards, > Bill Herrin > > >