I have Nuvio VOIP and the reverse DSL filter works. The VIP622 still has to dial out about 3-6 times before it succeeds, but it does it eventually.
*99 worked very well with the 811 but this pxxa madxx of a 622 won't let you enter symbols.
As for VOIP syntax and unlocked ATAs, no thank you i have a life to live too. It reminds me of the days of Basic, Pascal, and Fortran. For those of you born lately that was the stage after computer consoles stopped occupying entire rooms, but when Bill Gates was still counting food stamps.