Letting prisons jam contraband phones is a bad idea, phone companies tell FCC

A Federal Communications Commission proposal to let state and local prisons jam contraband cell phones has support from Republican attorneys general and prison phone companies but faces opposition from wireless carriers that say it would disrupt lawful communications. Groups dedicated to Wi-Fi and GPS also raised concerns in comments to the FCC. “Jamming will block all communications, not just communications from contraband devices,” wireless lobby group CTIA said in December 29 comments in response to Chairman Brendan Carr’s proposal. The CTIA said that “jamming blocks all communications, including lawful communications such as 911 calling,” and argued that the FCC “has no authority to allow jamming.” CTIA members AT&T and Verizon expressed their displeasure in separate comments to the FCC. “The proposed legal framework is based on a flawed factual premise,” AT&T wrote. While the Communications Act prohibits interference with authorized radio communications, Carr’s plan tries to sidestep this prohibition by proposing to de-authorize certain communications, AT&T wrote. “This legal framework, however, is premised on a fundamental factual error: the assumption that jammers will only block ‘unauthorized’ communications without impacting lawful uses. There is no way to jam some communications on a spectrum band but not others,” AT&T wrote. Previous FCC leaders recognized the problem that radio jammers can’t differentiate between contraband and legitimate devices, AT&T said. “As explained above, there are no technical workarounds to that limitation with respect to jammers,” AT&T wrote. “Jammers block all wireless communications” In 2013, the FCC explained that jamming systems transmit on the same frequencies as their targets in order to disrupt the links between devices and network base stations and that this process “render[s] any wireless device operating on those frequencies unusable. When used to disrupt wireless devices, radio signal jammers cannot differentiate between contraband devices and legitimate devices, including devices making 911 calls. Radio signal jammers block all wireless communications on affected spectrum bands.”