The ICM Main Window's Mute button can be used to temporarily turn off the ringing sound played when you receive an incoming call while on the Internet. Incoming Call Pop-ups will still be displayed with this feature enabled.
When enabled, this feature remains in effect until you disable it or until the next time you start ICM.
To enable or disable the Mute feature:
From the ICM Main Window click on the Mute checkbox.
When this feature is enabled, the Mute checkbox is green.
Note: You can permanently disable the ringing sound using the General Menu in the ICM Setup window. For details, refer to Sound On.