Not sure that's an accurate subject line, but... I've started looking at Asterisk as a possibility for a small PBX here. I'm thinking of an ISDN (BRI) card for connection to the telco, with some analogue converters (Sipura) for existing phones too. I'm pretty sure that the functionality I want is all there (and then some!) but am not clear on one point. At present, I'm using a 6 line Lucent CyberGear Gold, which provides an ISDN TA 'built in', which I can use for backup dialup if the DSL goes down for instance. Is there any way of making the Asterisk box do something similar? i.e. either: a) provide dialout with PPP on one of the ISDN B-channels, to an ISP, to provide IP connectivity to the network as a whole? b) use a second ISDN card in some way to allow connection of an existing TA? I hope this is clear....! Thanks... Bob