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多选题
Which two are functions of an IP voice gateway?（）
A
provide far-end call control
B
provide far-end camera control
C
translate analog voice to packetized voice
D
transition call path between different networks
E
provide locations-based call admission control
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单选题Which statement describes the distributed call control model in VoIP networks？（）A
The gateway voice-capable device is configured to support call control directly performing call setup， call maintenance， and call teardownB
The gateway voice-capable device has a local call routing table configured through a routing protocol.C
The gateway voice-capable device relies on a call agent to support call control.D
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单选题One of your customers wishes to use the NAS to perform DHCP functions and does not currently have a Layer 3 gateway in its production network. Which gateway mode is appropriate for this customer？（）A
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