I have a Lexmark laser fax machine on a POTS line that also has DSL. In addition, I have 4 POTS voice lines that rotor. I don't have problems with the fax machine at all but I have a handful of customers that I can't send or receive faxes from. It seems the common denominator is that these customers all have cable internet and phone.
I would like to change over to cable for a 25% cost savings and a lot more speed but am concerned that we might have even more fax problems.
Is there a simple cure at my end for the customers' faxing problem?