A.Traffic congestion and air pollution are serious

B.Cross-regional collaboration is difficult

C.High O&M costs

D.The means of communication are discrete

A.Microphone

B.Smart tracking camera

C.Display

D.Codecs

E.Speakers

A.30%

B.25%

C.20%

D.70%

A.200

B.800

C.600

D.400

A.During normal operation, the IP PBX of the center spits out the cached tickets to the third-party billing system, and the branch gateway does not cache the CDR

B.During local regeneration, the spoke gateway starts caching the CDR and spits out the call to the third-party billing system after the network between the spokes and the hub is restored

C.During normal operation, both the ip address PBX and the spoke gateway of the hub spit out the cached orders to the third-party billing system

D.When regenerating locally, the spoke gateway does not cache the CDR