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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 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.

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