I have a DXP system, not a phone guy here so need some advice.

we had a surge and it appeared to knock out a t1 card. Replaced the t1 card and I have no error lights on either of the t1 cards now. Verified the fiber and tranceivers between the t1 cards are good. at one end if I dial an extension to another building it says network busy, if I dial from the other end it says line error.

what else can I try. I manage this through the vmmi software but everything looks okay there as far as I know