We used to fax via pots lines connected to an analog card on our ShoreTel system as well. We were experiencing a 50% failure rate using this faxing method. We switched to Onlinefaxes.com, which was purchased by eFax back in September. Onlinefaxes used to allow unlimited receive addresses, so all staff could have their faxes faxed directly to their email inbox. With eFax, you are only allowed 5 with the type of service we bought, basically $99 a year. I setup 4 department heads to be able to Fax from their own email address, and a generic one for everyone else that’s monitored by IT and our Chms admin. They forward, then delete the fax once they confirm the intended recipient has it in their inbox. We have had 2 fax failures, 1 the person faxing forgot to add the “1” in front of the number, and 2) the receiving end had an issue but the fax was delivered after they fixed their issue. It’s been very reliable.