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