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.