[Asterisk-Users] ISDN BRI and signalling

[Bob van der Moezel]

I want to signal BUSY condition to a bristuffed HFC-S ISDN line.

However:
  "exten => s,1,Busy" has no effect,
  "exten => s,1,Playtones(Busy)" is not audable over unanswered line (I
live in the Netherlands...)

So I currently do:
+ exten => s,1,Answer
+ exten => s,2,Playtones(Busy)
+ exten => s,3,Busy
Which obviously is not an ideal solution.

Is there a way to get real signalling out a bristuffed HFC-S ?