Introduction
If you’ve ever had to raise your voice in a large meeting room or strain to hear a colleague during a call, you know how important microphone clarity is. The Yealink CP925 is a powerful conference phone, but when the room gets bigger, or more people are involved, its built-in mics might not be enough. That’s where expansion microphones come in—giving your CP925 extra reach, like giving your phone longer ears.
In this guide, we’ll walk you through everything you need to know about Setting Up Expansion Microphones on the Yealink CP925—in a way that’s easy to follow, even if you’re not a tech expert.
Table of Contents
- Introduction
- What Are Expansion Microphones?
- Why Add Them to the Yealink CP925?
- Key Features to Know
- What You’ll Need Before You Begin
- Step-by-Step Setup Instructions
a. Connecting the Microphones
b. Firmware & Compatibility Check
c. Device Pairing Process - Troubleshooting Common Issues
- Ideal Microphone Placement
- Audio Optimization Tips
- Microphone Model Options
- Where to Buy the CP925 and Accessories
- Conclusion
- FAQs
What Are Expansion Microphones?
Expansion microphones are add-on devices designed to extend the audio pickup range of your conference phone. For the Yealink CP925, they allow everyone’s voice to be captured clearly—even those sitting far from the main unit.
Why Add Them to the Yealink CP925?
The CP925 has strong built-in mics, but if your meeting space is medium to large, or you regularly host more than five people, these add-ons help eliminate audio dead zones. It’s a simple way to elevate the experience for both in-person and remote participants.
Key Features to Know
When using Yealink CP925 expansion microphones, you get:
- 360-degree voice pickup
- Noise-canceling features
- Local mute buttons for each microphone
- Automatic pairing with the base phone
- Sleek, minimal design to match the main unit
What You’ll Need Before You Begin
To get started with the Yealink CP925 microphone installation, make sure you have:
- The CP925 conference phone
- Compatible expansion microphones (e.g., CPW25)
- The latest firmware installed on your CP925
- A quiet space for testing
If you’re not sure where to find these, take a look at the available IP phone models listed here.
Step-by-Step Setup Instructions
a. Connecting the Microphones
Unbox your expansion mics and plug them into the designated ports on the CP925. If using wireless models, they should automatically enter pairing mode when powered on.
b. Firmware & Compatibility Check
Navigate to your phone’s menu:
Menu → Settings → Device Information → Firmware Version
Compare this with the latest version on Yealink’s official website. Outdated firmware can cause connection issues.
c. Device Pairing Process
- Go to Menu → Settings → Audio Device
- Choose Pair Expansion Mics
- Hold the mic’s pairing button until the LED flashes
- Select the device from the list and wait for confirmation
Once paired, the mic will light up to confirm a stable connection.

Troubleshooting Common Issues
- Mic not recognized? Reboot the CP925 and try pairing again.
- Poor audio? Ensure microphones aren’t obstructed.
Interference or static? Check for wireless devices nearby and reposition if necessary.

Ideal Microphone Placement
Proper placement makes a big difference. Try to:
- Keep mics 4–6 feet apart
- Avoid placing them near AC units or projectors
- Ensure they’re not behind physical obstructions like laptops or water bottles

Audio Optimization Tips
Once you complete your Yealink CP925 microphone configuration, keep these tips in mind:
- Mute unused microphones during smaller meetings
- Place microphones at table level for consistent voice pickup
- Perform a quick sound check before every important call
For more advice on improving your office audio setup, explore this overview on voice solutions for modern teams.
Microphone Model Options
The CPW25 is the recommended mic for this model. It’s designed for full compatibility and offers:
- Wireless functionality
- Mute indicators
- Extended battery life
Always verify model compatibility before purchase.
Where to Buy the CP925 and Accessories
You can explore available options, including the Yealink CP925 and accessories like the CPW25 mic, from the lineup of IP phone models on Promallshop. You’ll find current pricing and product availability there.
Conclusion
Great audio doesn’t need to be complicated. By setting up expansion microphones on the Yealink CP925, you’ll dramatically improve the sound quality of your calls—ensuring everyone’s voice is heard, no matter where they sit.
Whether it’s a boardroom or an open office, a simple setup like this can make all the difference. Clearer communication. Better meetings. Happy participants.
FAQs
No, the CP925 supports up to two external microphones at a time.
Yes, as long as your firmware is up to date and the microphone model is compatible.
Wireless models like the CPW25 have built-in rechargeable batteries.
No, once paired, the microphones automatically reconnect when turned on.
Yes, each mic has a local mute button for privacy and noise control.