Local5Tech
Programmer
I have now run into this same problem twice now and am looking for an answer to give to user. At two separate locations with the same area code (724) the users cannot send a fax to a specific number with a (412) area code. They are over POTS lines connected directly to their station. They can place voice calls to the intended number with no problems(can hear fax answer), however faxes will not go through and the machines will print out "Data transmission failure" after attempts fail. Faxes to other numbers have no issues, even some numbers with (412) area code. These are specific numbers that won't work. I listened-in to the faxes with my test set and I can hear the far end (412) fax answer, but the tones get jumbled and then disconnect. (In comparison to a fax to a good connection which I can hear the two machines handshake and relay the data) I really have no idea of what type of service that the far end has (Provider, PBX, FAX Server, etc) but both of my locations are Verizon C.O.'s. Has anyone else run into this situation that could shed some light on the subject?