Most modern security systems use QR codes to simplify the "handshake" between your physical camera and the Telegram app. Scanning to Connect : Hardware like the Go to product viewer dialog for this item.

Some modern IP cameras (TP-Link Tapo, EZVIZ, Reolink) now include "Telegram Notification" as an action in automation platforms. The QR code is used to connect the camera’s cloud to a Telegram bot via or Node-RED .