Hello there - I have an AVM C4 card, which has 4 controllers. I am able to dial from outside to SIP phones - but not to ISDN phones. (an from SIP to the outside world) I want to have Asterisk betwen the PSTN and the internal ISDN phones. So, controller 1 of the c4 card is connected to the NTBA - and I plugged a phone directly into controller 2. Please do not say "Duuhhhh" - but I thought that was how it worked. this seems to be wrong. Is the C4 card unable to power the internal bus? would I need to make a (cheap) internal bus if this is not the way to do it? ?lainn ***************************************************************************** "The cheese-mites asked how the cheese got there, And warmly debated the matter; The orthodox said that it came from the air, And the heretics said from the platter." Anon.