In the Early state, the caller can end dialog0 by sending ( ).

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The MCU wall-riding mode has its advantages, but there are also certain constraints, such as ( ).

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What factors does the quality of digital audio depend on?

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The types of terminal faults can be summarized as: local AV faults, remote AV faults, and call and conference control problems.

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When 2 MCUs are cascaded, a meeting is scheduled, and the upper and lower MCU join the meeting as a virtual venue. ( )

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