This is a list of articles which pertain to telecommunications on 24.
“A subchannel chip was a piece of telecommunications technology designed to receive a specific...Subchannel chip
“OPCOM was a secret CIA backchannel communications link, believed to have been inactive for...OPCOM
“A VPN pathway was a way of stopping cell phone calls from being monitored. It could take someone...VPN pathway
“SIM cards—technology found in cellular phones—served to provide critical leads during the CTU...SIM card
“ECHELON was an NSA government system to monitor messages transmitted via phone or the internet...ECHELON