I had a similar problem with another office that everyone at tektips was very helpful with , but the problem has been reversed. All our offices use MCI T1s and when this one particular office calls any of our other offices, our company's name shows on our caller ID (which is what we should be seeing). If this office calls a regular POTS line the far end sees the name of an employee who left years ago. This employee's name starts with the letter A, which leads me to believe that years ago, when the office first opened and they used Verizon POTS lines, this employee was the first name listed on the account. Now we have an MCI T1 but this old employee's name shows on outbound caller ID. MCI just told me it's my PBX, but I know that's not the case. How can I explain to MCI in basic English what they need to do to correct this? This has been going on for two months now. Thank you.