So under Customise Call and Queue Ringtones there is only 1 option called Default Ring tone which basically means it is the same ringtone for internal and Queue ringtone. I cant have internal and external queue calls with different ring tones.
I have a customer who has asked if I can change the Ringtone for internal and External calls. Most of the Externals calls hit Queue groups. As they have 3CX Pro 16 licence I can see they cannot have individual ringtones for each queue unless they have 3CX Enterprise. At the bottom of Users->IP...