Assuming it's not coincidental that a particular phone number is always busy, is there ANY way my PBX could deny calls to a particular phone number when calls to other numbers in the same NPA/NXX CAN be completed? example: calls to 212-555-1212 always complete but calls to 212-555-3434 always, ALWAYS get a busy signal. Calls from cell phones can complete the call. Nothing but 976 is blocked in the SDRR table. thanks.