Hi, I'm Nathan.Sorry to hear that you're having trouble with this but I'll do my best to help you.
Can you tell me a bit more about the problem please:1) Is this a dedicated fax line, or a shared voice/fax line?2) Is this a landline from the local phone/cable company, or a VOIP service (vonage/magicjack/etc)3) Do you have dsl service on the same line?
That is the most likely source of the problem, this type of digital phone line is not designed for fax use. Faxes are analog devices and have difficulty transmitting on a digital line because of the noise and compression, which is why you aren't able to even dial properly.
There are a few settings we can try to adjust though,
go into the fax settings menu on the epson, under send settings, and set that to slow,
then set the ECM function to OFF,
try a test fax and let me know the results.
Is the fax plugged into a modem, or just a regular wall jack?
Okay can you please plug a regular phone into that same jack and test if you can get a dial tone on it and call out on it successfully?
Can you go into the fax settings again under line type and try changing it to PBX and then test sending again
Thanks for checking,
Can you double check one more thing for me: Look on the back of the printer - are you certain you have the cord in the right spot - the phone cord needs to be in the #1 (line/wall) jack, not in the #2 tel/ext jack
Thank you for trying, can you also try turning the Dial Tone Detection to OFF and test again,
it may also be worth trying to add several pauses before the number, so it has time to dial the full set of digits