Desk phone Rings when on a call

We have recently installed an S100, the problem is that when I am on a call, whether it is on my desk phone, mobile app or desktop app, the phone still rings on other incoming calls as if I am available, the system does not seem to know that I am on a call already and send out a busy signal.

I have looked at all the settings but I cannot see anything that will make a difference.

Has anybody else had this problem? And do you know how to fix it.



Please sign in to leave a comment.