·Time Warner Cable
I'm having one sided call problems with VOIPo too
I'm pretty certain my equipment isn't at fault (I've changed ISPs/routers and the problem followed). I created a support ticket, they supposedly switched networks that I'm on, but no difference.
It's so hit and miss. At least if it were consistent I'd be more easily able to get tech support to fix it. Some days I can make lots of calls without any trouble, other days I have to resort to my cell phone.
AT&T U-Hearse - RIP Unlimited Internet 1995-2011