WhatarethreeCiscoUnifiedCallManagerfeatures？（）
A. programminginterfacetoexternalapplications
B. FXSandFXOportnegotiation
C. AutoQosVoIPtrustboundaries
D. signalinganddevicecontrol
E. LLQforvoiceandvideotraffic
F. directoryandXMLservices
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1987年，秦始皇陵及兵马俑坑被联合国教科文组织列入《世界文化遗产名录》。（)
WhichthreefunctionsareassociatedwithaCiscoUnifiedCallManager？（）
A. connectstraditionaltelephonydevicestovoiceoverIPinfrastructure
B. convertsanalogsignalstodigitalformat
C. performsvoicecompression
D. performscallprocessing
E. performsdialplanadministration
F. performssignalinganddevicecontrol
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