said by PDXPLT 
:said by aggie2 : ...a single option that has had almost every trial stopped due to interference issues.
To be fair, almost all those trials were based on technology from a single supplier, one with known interference issues.
I think you're right that all of the shutdowns have involved one vendor, however there's two other vendors that have had several interference complaints, one that has been in the spotlight recently and another one that the FCC has been sitting on for a long time.
