I was starting to come to that conclusion.
Making unwanted callers listen to bad music is half the fun of having a hobby pbx system.

Carl, would the standard K400E line cards work with a SB4201 music source? The K401 has individual line isolation transformers and if I am reading the Sanbar 4200 manual right, the isolation was in the 4200 line card not the source. the k401 was essentially just a mixer to isolate the music signals from one another.

thusly: Beep line cross communications between all my bill collectors and relatives on hold. not a good idea to encourage them to compare notes with one another.