[Asterisk-Users] Making an ISDN call via Asterisk?

[Bob Eager]

I did post this a couple of days ago, but no-one has replied yet....so I
thought I'd make the subject line a bit more accurate, add a bit, and try
again!

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. Once it's up and running
I'll probably have a go at external VoIP 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 local 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