Thanks for the information, and I had followed that procedure on previous versions, hence asking if I had missed something. The version of the ISO is SME8A18V31128
Although linux seems to be aware of the card, Asterisk / Sark does not. As suggested I ran the dahdi_genconf and it seemed happy enough, saying that it had created :-
Generating /etc/dahdi/system.conf
Generating /etc/asterisk/dahdi-channels.conf
No error message or anything else to suggest there was a problem. Still no trunks with that naming?
Regards P