Package Contents
The Yealink CMKit-121 is a comprehensive package designed as the core setup for the Yealink audio ceiling solution. It includes the CM20 ceiling microphone, a pair of CS10 ceiling speakers, and an RCH40 E2 switch.
Ideal for standard-sized medium to large conference rooms (5m x 8m), one CMKit-121 provides complete coverage. For extra-large conference rooms (6m x 10m), two packages can be combined to extend coverage. Each package functions as an independent audio unit, guaranteeing secure and stable audio experience.

Powerful Capture, Incredible Playback.
The CM20 boasts 16 omnidirectional microphone units, ensuring crystal-clear audio across 8 independent pickup zones.
It covers up to a 4m radius with high-quality full-duplex audio capture within 3m, perfect for medium to large spaces. Its internal EQ tuning highlights human vocals for exceptional clarity. Additionally, the CS10 is optimized with a sound profile tailored for video conferencing, focusing on mid-range frequencies to enhance voice clarity.
Together, these features deliver superior audio performance for various applications.
*3.2 meters pick-up radius with STIPA value 0.78
4.5 meters pick-up radius with STIPA value 0.72
Environment: RT60 = 408ms@1khz; Noise Level = 40dBA;
2.8 meter deployment height.

Intelligent Algorithm, Adaptive Optimization.
By incorporating AI Dynamic Noise Reduction and AI Reverberation Suppression, CM20 guarantees prestige audio quality during every meeting. It effortlessly adjusts to the ambient conditions of the room, effectively minimizing noise and echo. With its integrated DSP, each CM20 seamlessly integrates into Yealink MVC systems, eliminating the need for an additional DSP device and delivering exceptional meeting experiences.


Deployment Solution Example
Ensure every participant hears clearly with Yealink CMKit-121's superior audio performance and extensive coverage. Perfectly tailored for large and extra-large conference rooms, it sets the stage for seamless communication and impactful discussions.
From Initial Design to
Final Implementation
Yealink's deployment tool offers limitless combinations. Easily create your personalized heat map and find what’s the best audio ceiling solutions to suit the specific needs of your room.

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Medium-large meeting room (4 × 6 m, 7-12 people)
Meeting Scenario:
Connection:Extra-large meeting room (4 × 8 m, 12-20 people)
Meeting Scenario:
Connection:
You can use the following types of switches:
Recommended switch | Description |
---|---|
Yealink RCH40 E2 | RCH40 E2 is a compact and user-friendly meeting room switch introduced by Yealink. It features disabled EEE (Energy Efficient Ethernet) functionality and supports Dante and AES67 protocols for audio transmission. |
Netgear Pro AV switch | The Yealink audio network requires a switch without EEE (Energy Efficient Ethernet) capability but with QoS (Quality of Service) support. Yealink’s recommended and preferred choice of switch for this purpose is the Netgear Pro AV switch. |
Model | Supported microphone | Supported speaker |
---|---|---|
AVHub | CM20 | CS10, MSpeaker II |
VCM35/VCM38 | CS10, MSpeaker II | |
VCM36, CPW65 | CS10, MSpeaker II | |
UVC84/UVC86 | CM20 | CS10, MSpeaker II |
VCM35, VCM36, VCM38, CPW65 | MSpeaker II | |
AP08 | CM20, CM50 | CS10-D |
The above table is only applicable to CM20 and CS10. The CS10-Dante version is not compatible with the above hosts.
Host | Firmware Version | Max. Number of SkySound devices (via a switch expansion) |
---|---|---|
AVHub | 153.433.0.5 and later | 4+4 |
UVC86 | 151.433.0.5 and later | 4+4 |
UVC84 | 262.433.0.5 and later | 4+4 |