I still notice jitter problems with tollfreegateway. I also have issues using RFC2833 DTMF with it (it suffers from the repeating digit problem). If I enter 1 2 3 4 5, it may detect 1 2 2 2 3 4 4 5 instead. Inband DTMF works fine with it the last time I tried, though.
For anybody keeping score, trxtel stopped its service recently.
I'm finding it most reliable just to pay for toll-free calls these days.
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