Well I don't need all the protocol details right now, I just really need to now how it works phisically. IE: I have a standard PC server, linux on it. It's in a datacenter somewhere. Now, what is needed in order to connect to the X25 network ? I know I have to use a PAD, but do I need to connect to special lines ?? I'm quite in a fog right now . BTW thanks a lot for this reply eventhough it is not perl related.