题目内容

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

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