asterisk users - Jan 2005 - Dell Poweredge 6300 & 4 analogue lines

I'm just about to start implementing this project. I have a test
server working well with SIP phones and IAX for incoming and outgoing,
but when I golive will need 4 analogue lines coming in.

1. Anyone got this config working with a 4 port FXO  digium card
2. Any tips/hints/traps

Thanks

John
(My first posting be gentle)