| Issue | Solution | |-------|----------| | Device not detected | Try a different USB port or cable. Avoid USB 3.0 ports if issues persist. | | No sound / mic | Right-click speaker icon → → Playback tab → set C100s as Default Device . | | Echo during calls | Reduce speaker volume or enable acoustic echo cancellation in your softphone settings. | | Driver error in Device Manager | Uninstall device, scan for hardware changes, or run Windows Update. |
: The device may occasionally display "USB Device Not Recognized" errors. This is often a hardware failure or a conflict with modern USB 3.0 ports. Recommended Setup for Windows 10 Polycom Communicator C100s Windows 10 Driver