There are five LED statuses for E10S/R: NORMAL,
OFFLINE, CALLING, TALKING and RECEIVING.
Go to Intercom->Led setting, to configure corresponding
LED response.
4.2. Live Stream(E21V Only)
Go to Intercom->Live Stream, check the real-time video from E21
series. In addition, user also can check the real-time picture via URL:
http://IP_address:8080/picture.jpg.