I can't find how to swap the incoming and intercom ringing. My customer insists on "Long" ring for incoming and European ring for intercom. Have been all over the manual. Please help.

This can't be done. The ringing tones can be changed using function 695, but the cadence is fixed. Sorry.....

A much earlier Starplus system had a co ringing cadence option, but it dissapeared a long time ago.