Tone when called phone is busy but has call waiting on

Hi. I have an installation with snom phones and I wonder if I can do the following:

My users has call waiting on. So when someone is busy and I call him I hear the normal tone as he was not busy. Is there something I can do to hear a different tone in this case so I can understand that he speaks and call him after some minutes?

Thanks.

Maybe this help wiki.asterisk.org/wiki/display/ … ices+(CCSS

Unfortunately not.

The way of doing this used to be to set a call limit on the destination device. There is now a new mechanism, something to do with groups. I haven’t looked into this in enough detail to say anything more, but maybe it will give you a clue as to where to look.

I wait for your news.