There are 2 Browser options which can be enabled.

 

Activate dialing within Browser

This option allows to dial via right mouse click within the Browser. For details see Dial within the Browser.

 

Dial with right mouse button is available only in the Internet Explorer

Activate dialing via Hyperlink

This option allows to dial via Hyperlink. For details see Dial with a Hyperlink.

 

Dialing via Hotkey is also working within a Browser.

 

See also
 
Where do I find this screen?
Troubleshooting - Dial with a Hyperlink is not working
Configuration - Application used for dialing with Hyperlink