多选题Which three functions can an Integrated Services Router perform in a VoIP network？（）Avoice stream mixing for conference callingBvoice gatewayCcall admission controlDanalog or digital phone interfacesEXML application servicesFlarge scale dial plan application
多选题
Which three functions can an Integrated Services Router perform in a VoIP network？（）
A
voice stream mixing for conference calling
B
voice gateway
C
call admission control
D
analog or digital phone interfaces
E
XML application services
F
large scale dial plan application
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