CTA’s Audio and Video Systems Committee (R4) recently published, CTA-814-C R-2023, Emergency Messaging for Cable. This is a reaffirmation of ANSI/CTA-814-C/J-STD-42-C. This standard defines protocols for codes sent to consumer devices instructing them to automatically change channels to the dedicated channel with the emergency alert and instructing them how long to remain on the emergency channel until returning to the channel the viewer had been watching.