The techs at the Megalink centre at the big telco around here, Hell Canada, always seem to have trouble turning up a PRI circuit. ( I believe they are poorly trained in trouble shooting ) When they have their troubles they always say the problems are with the phone equipment and I should replace the DTI card. (once they figure out what they have misprogrammed they seem to forget that they blamed the phones system). I have never had or heard of a DTI actually failing. Has anyone ever had one crap out? Just curious.