How to set up the Yealink CM20 Ceiling Microphone, from unboxing to a working test. It adds microphones to the MeetingBar A40, SmartVision 40 and MVC S40.
Before you start: check the box
- CM20 microphone
- White and black mesh covers
- Assembly fixing bracket
- Dust cover
- Bracing bridge (1 pair)
- Mounting screws and bolts
- Quick start guide
What you need
- Ports on the CM20 Ceiling Microphone: Network: AES67; 1 x RJ-45.
- A host system: the MeetingBar A40, SmartVision 40 and MVC S40, plus a PoE switch port.
- Power: PoE (IEEE 802.3af, Class 3), 9 W rated.
Step by step
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Plan the ceiling position. Mount it over the table, centered on the seats it covers (each one covers 30 m² full-duplex (3.2 m radius); up to 60 m² (4.5 m radius)), away from HVAC diffusers and lights. See CM20 Ceiling Microphone mounting and placement.
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Connect the network cable. Connect one Ethernet cable from a PoE switch port or injector (802.3af); that one cable powers it and connects it to the network.
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Add it to the room system. With the host powered on, the CM20 Ceiling Microphone is detected automatically. Check the host's settings or admin portal lists it, then set it as part of the room audio.
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Update the firmware. Do not unplug devices during an upgrade. See Updating the firmware below.
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Run a test call. Join a test meeting, talk from the farthest seat, and ask the far end whether you're clear, at a good level and without echo.
Updating the firmware
Do not unplug devices during an upgrade.
Tools:
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Yealink Management Cloud Service (YMCS): cloud device management and firmware
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Yealink Device Management Platform: on-premises device management
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Microsoft Teams Admin Center: firmware and management for Teams-edition devices
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Don't unplug the network cable while an update runs.
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Update one room first, test a call, then roll out to the rest.
Manual and documentation
Yealink's product page for the CM20 Ceiling Microphone: documentation and downloads. Check it for exact port diagrams and admin settings for your firmware version; more guides are on the Yealink support site.
If something doesn't work
Start with CM20 Ceiling Microphone troubleshooting. Want it done for you? We plan rooms and ship them ready to install. Get a quote.
More CM20 Ceiling Microphone guides
- CM20 Ceiling Microphone buyer's guide: specs and price
- CM20 Ceiling Microphone: troubleshooting
- CM20 Ceiling Microphone: mounting and placement
- CM20 Ceiling Microphone: Teams, Zoom and Google Meet
- CM20 Ceiling Microphone: what room size it covers
- CM20 Ceiling Microphone: price and total room cost
- CM20 Ceiling Microphone: full specs
- CM20 Ceiling Microphone: alternatives compared
- All Yealink microphones compared
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