I have been hearing these are the best option if you want to try to fax. I have a customer I used the Cisco SPA 122 (or SPA 112) ATA with the right settings to be used as a fax line successfully. Here is the article I found: https://www.t38fax.com/support/knowl...phone-adapter/ . The customer is happy with it. Just make sure on your fax, you use VoIP setting or lower speed. These ATA's have the best voice quality I've used so far also. Yes they are a little more expensive, but makes for happier customers. A good replacement since I have been using Grandstream HT502's exclusively. VOIPo should consider adding these ATA's to the hardware provisioning section definitely.

Just my .02 cents