Which of the following are points of electronic power telecommunication?
A . public network GPRS with low rate and long delay unable to
provision telecontrol, tele indication and telemetering, slow fault locating
B . high cost for monitoring service carried by operator 4G network
C . low security and reliability of electric power services carried on public network
D . incapable of collecting electric consumption information, costly manual meter reading
Answer: A, C, D