Not even remotely. Ever heard of Efax?
You email the phone number and the Efax company sends the fax.
eFax was bought by j2.com, so indeed i’m aware of it. Efax, Jconnect, j2.. all the same ownership.
Fax is being ditched by those who think it is no longer used, regardless of whether they have dedicated equipment or a gateway. It’s the same decision. Either they ditch their fax service (i.e. their fax line is virtual), or they ditch their fax hardware. Or they decide to keep the fax number because they see they have customers who still use fax.
More likely they would call it, get the fax tone and mark it as a wrong number until you contact them.
They can suit themselves.. that doesn’t matter to me either way if they decide to alternatively pay postage to reach me. Of course they’re going to be waiting a long time for me to reach them if they don’t signal to me that they want to reach me. If I decide to call them from my non-DID SIP line, the caller ID is set to spoof my fax number, which shows them the number is still correct.