The Signal Inhibitor is a Foehn support structure that prevents enemy commanders or proselytes from using any support powers in the immediate area around the Inhibitor, rendering Foehn bases safe from such threats. It does not, however, block the use of reconnaissancesupportpowers.
The Foehn Revolt has no problems with breaking into other commander's control protocols thanks to its advanced supercomputers, a strongly developed artificial intelligence system and a few talentedpeople behind it all. Basing some of their research and new weapon designs on intel acquired directly from their enemies command posts, they've been able to come up with a device that disrupts the signals which are given to their enemies' support power and superweapon control systems and block the transmission of co-ordinate information from the commanders themselves.
The Signal Inhibitor will not allow for any support power or superweapon to be launched within its area of effect as long as it is powered. The only exceptions to this rule are the scout powers.