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The Yealink CMKit-121 combines the CM20 ceiling microphone, two CS10 ceiling speakers and the RCH40 PoE+ switch into a single solution for medium to large conference rooms. The CM20 ceiling microphone uses a 16-element omnidirectional array and integrated DSP to capture clear 360° audio and works plug-and-play with Yealink MVC systems. The CS10 low-profile coaxial speakers deliver balanced audio for conferencing and support PoE installation with options for various ceiling types. The RCH40 E2 Gigabit PoE+ switch provides four Gigabit downlink ports and one Gigabit uplink, supporting 802.3af/at and up to 30 W per port with a total PoE budget of up to 90 W. The kit is supplied with installation accessories and includes a 2-year AMS service. Connection is via RJ-45 and the devices are intended for ceiling placement.

Advantages

The kit integrates ceiling microphone, speakers and PoE+ switching in a single package to simplify procurement and installation. The CM20's 16-omnidirectional microphone array and onboard DSP reduce the need for external audio processing while ensuring full-room coverage. CS10 speakers feature a discreet low-profile design that blends into modern meeting rooms while supporting PoE for simplified cabling. The RCH40 E2 switch supplies sufficient PoE power for the included devices and other room equipment, enabling a compact, networked AV setup.

Suitable for (tasks / use cases)

• Medium to large conference rooms and huddle spaces
• Video conferencing systems with Yealink MVC appliances
• Meeting rooms requiring ceiling-mounted audio components
• Installations where PoE-powered audio simplifies cabling

Key specifications

• Included components: 1× Yealink CM20 ceiling microphone, 2× Yealink CS10 ceiling speakers, 1× Yealink RCH40 E2 switch
• Microphone: 16 omnidirectional elements, 360° pickup
• Microphone frequency range: 100–20,000 Hz
• Microphone sensitivity: 94 dB
• Speaker: CS10 low-profile 2-way coaxial design, PoE-enabled
• Switch: RCH40 E2 — 4× Gigabit downlink PoE ports, 1× Gigabit uplink, 802.3af/at, up to 30 W per port, total PoE budget up to 90 W
• Connectivity: RJ-45 (Ethernet), PoE power source
• Placement: Ceiling-mounted
• Color options: Black, Grey
• Service: 2-year AMS included

How to use

Install the CM20 microphone and CS10 speakers into the ceiling at positions suitable for even room coverage, referring to the supplied installation accessories and room layout guidelines. Connect each device to the network using RJ-45 cables and provide power via a PoE switch such as the included RCH40 E2. Integrate the CM20 with Yealink MVC systems for plug-and-play audio processing; configure the RCH40 switch as required for VLANs or network quality-of-service if needed. Verify microphone pickup and speaker output, then adjust levels in the conferencing system or controller to obtain balanced audio for participants in the room.

Recommendations

For reliable voice pickup and even sound distribution, place the CM20 centrally or at evenly spaced positions depending on room shape, and mount CS10 speakers to avoid direct obstructions. Ensure the RCH40 E2 has adequate PoE budget for all connected devices and follow Yealink installation guides for optimal microphone array configuration and system firmware updates.