Microsoft Teams rooms offer a complete meeting experience, bringing HD video, audio, and content sharing to meetings of all sizes, from the huddle to large conference rooms.
Microsoft Teams meeting rooms video conference system include vital components that provide a great user experience.
    Touchscreen console
    Compute module
    Microsoft Teams Rooms application
    Peripheral devices (camera, microphone, speaker)
    External screens (maximum of two)
    HDMI input

Video conferencing terminal is the user-facing hardware, which contains much standard hardware for the public. For example, cameras responsible for image acquisition, video monitors for displaying images, microphones, audio, etc., are all covered in video conferencing terminal devices, which are integrated and integrated through the system to achieve the acquisition and output of video and audio information.

Different video conferencing systems and the end products involved vary according to different scenarios. Taking Microsoft Teams Rooms Devices as an example, we can draft and classify them into personal devices and shared devices

Personal Devices: Teams Mobile, Teams PC, Personal peripherals, Desk phone and mobile phone stations, etc
Shared Devices: Conference phones, Teams Rooms systems, Large-Screen Collaboration Devices, etc

A30 can support 3 types of microphones,
（1）VCM34——2
（2）VCM38——2
（3）CPW90——1 pair（2 pieces）
Note: The built-in microphone is disabled when using an external microphone; the A30 has a line-out port and can be used with an external speaker

No, you must manually select one of the functions.