I agree with DaveD,
there is no localization by Country or CPU,
If you want it to actually work, then I suggest you fess up and pay, and believe me 66 bucks is a small price to pay to get it actually working with DTMF et al. a regular TDM channel will cost you 10 to 20 bucks a month and each and every month,well as long as you use it anyway.
The other "solutions", whilst being cheaper will leave you with as little hair as I have

and very rarely a functional channel, for incoming I believe you will need to buy a g729 license (or two) for 10 bucks each, so make that 56 bucks or less because g729 is included. You get what you pay for and free stuff is rarely "free", unless you value your time at zero cost, there is also a very high likelihood that they will break it soon after you get it "working", this is because they are way cleverer than you and have a vested interest in actually making money and not giving their hard earned profits to you for free

.
regards
dicko