This morning one of my centers are saying they cannot call certain centers over our Point To Point T-1. All trunks have been monitored and Li measurement log are all clean. I list traced one of the stations and I received a "Denial event 1012 Desination D1=0X68 D2=0x149". This was very early in the morning when our traffic is low. What could be the problem on our end before I get caught up in the Verizon Fiasco?