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多项选择题What two are features of the Cisco Unified CallManager Express QCT?()

A、autodetection of Cisco router components 

B、automatic download of system parameters from central site 

C、standards-based autoconfiguration using SIP and SCCP 

D、support for barcode-scanned input of IP-phone MAC addresses and phone types 

E、automatic identification of phone types and MAC addresses upon booting the Cisco Unified CallManager Express router

  • A,D
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