Which two statements are correct when discussing the Cisco TelePresence codec software upgrade process? (Choose two)

A.
Cisco TelePresence codecs must have IP address information for the TFTP servers that the Cisco Unified Communications Manager uses

B.
Cisco TelePresence codecs use H 264 to download system images and configuration files

C.
To abort the upgrade, you can reboot the codec manually before the codec finishes downloading the software image

D.
The peripherals upgrade can take up to 60 minutes to complete. During the upgrade, the display screens are blank. Do not manually reboot the codec during the peripherals upgrade