How do I fax long distance on a HP Office jet Pro L7780 All in One fax,printer, scanner?

If you are on DSL or Cable, you have to go through a fax service. Faxing requires a telephone modem in order to function.How do I fax long distance on a HP Office jet Pro L7780 All in One fax,printer, scanner?
The same way you fax next door, except the number you dial is a long distance number.How do I fax long distance on a HP Office jet Pro L7780 All in One fax,printer, scanner?
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