Visual link
From Tardis Wiki, the free Doctor Who reference
Cybermen produced by Cybus Industries in Pete's World had eye-pods which could establish a visual link, transmitting the vision of their eye-pods to other devices. During the Battle of Canary Wharf, Cyber-Units Ten-Six-Five and Ten-Six-Six opened a visual link connected to a laptop computer within Torchwood Tower, allowing Cyber-Leader One to witness the disastrous confrontation with Dalek Thay and make visual contact with Dalek Sec, meeting the Cult of Skaro's communications barrier. (TV: Doomsday)
