We recently did a switchover to a new pbx with a new vendor. Both systems are Meridian. However upon the new switch, our calls were somehow routed to AT&T and that is not our long distance vendor. SBC was involved in re-routing the primes to the new location on campus. I'm wondering if I can check somewhere in the configuration of the meridian to see if there is a special pic code entered which is routing our calls to the wrong long distance carrier as they are telling me they did not do that 
Thanks a million for anyone who has the answer.
Thanks a million for anyone who has the answer.