I have one of these which I'm really struggling to setup with 2Talk. I've guessed the majority of the sessions from my experience with Cisco and Yealink products, but I can't nut out the "Call Progress Tones" which are coded quite differently from Cisco's.
I'm not too sure if I need the Distinctive Ring Tones as well, but I'm guessing I can go without. I'm using the gateway for a FAX machine so settings need to be spot on.
I've always used SPA gateways from Cisco/Linksys but have not found them reliable enough. Sadly looks like I've shot myself in the foot with this fancy one which is beyond my skills set. We use 3CX which supports this gateway, but I can't get the 3CX -> 2Talk connection to behave using T.38 so I'm wanting to go direct to 2Talk which makes the most sense.
Any assistance would be gratefully received.