Disabling Telephony will break any software that expects dial‑up, fax, or phone line support. For most modern PCs (no landline/fax), it’s safe.
In Windows 11, "telephony" usually refers to the feature for Bluetooth devices. This feature often lowers audio quality when the microphone is active. You can disable it for a specific device or turn off the system-wide service to prevent it from re-enabling automatically. Method 1: Disable for a Specific Device how to turn off telephony windows 11
(if present)
Most users want to disable this feature because it causes Bluetooth headphones to sound "muffled" or like a low-quality phone call when an app (like Discord or a game) tries to use the microphone. Disabling Telephony will break any software that expects
Click on , scroll to the bottom, and select More devices and printer settings . This feature often lowers audio quality when the
Method 1: Disable Telephony for a Specific Device (Recommended)