It appears that the '1' is being stripped off when dialing long distance within our home area code. Ever since we upgraded some of our trunks to ISDN we are having this problem. We dial 1-763-NNN-NNNN, but get recording that says 'you must dial a 1 when calling this number'. I don't understand what is wrong. Did List Trace Station, and this happens when the outgoing call seizes either a member of trunk 4 (isdn), or a member of trunk 1 (dss). Can anyone help? Thank you.