How to Test Your Fax Line. After setting up the fax service on your modem or server, or connecting your fax machine to a phone line, send a fax to HP Fax Test Service or Fax Toy to confirm your ...

How to Check Line Quality on a Fax That Won't Work. If your business' fax machine has trouble sending or receiving faxes, a possible source of the problem is the phone line itself. Fax machines ...