By the way I figured this out using the NSE g711ulaw pass-thru. 1.) Firmware has to be on latest available2.) i had to configure the ATA in CM with NSE G711ulaw pass-thru3.) under the global Voice Service Voip on local GW>>Voice service voip fax prot...

Dang, well I kinda figured that was the case. I purchased a few of the ATA190's in hope they would be better. Having issues with those now as well. Trying a new COP file in the morning to see if t will solve the problem...

Did you ever figure this out? I'm having the same issue with FW version 1.1.2-05. Can make calls from ATA but not fax.