A new single board TOA is added to the current network 8800 (version R7C02SCP300), and the network management query for the TOA single board software cannot automatically match the R7 version of the main control. What are the possible reasons? (Multiple choice)
A . The original main control of the 8800 device is a custom package. There is no software for the TOA board, so it cannot automatically match the version.
B . 8800 device automatic matching software function is turned off
C . 8800 device does not have the function of automatic matching software, and the software package loading operation needs to be performed again.
D . The software version of TOA is higher than the current version, so it cannot be automatically matched.
Answer: AB