试题详情
- 单项选择题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 teardown
B、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、The gateway voice-capable device relies on a gatekeeper to support call setup， call maintenance， and call teardown.
- A
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