Ok, this is a weird one.  I've been using VFX for a few weeks now, but this morning, I was unable to hear anyone on incoming calls.  They could hear me, but I could not hear them.  If, however, I called them, we could enjoy duplex conversation.

I had not made any recent changes to my router connected to my TC cable modem.

After discussion with tech support, and trying a few things, I put the SPA2102 infront of the router and it started to work normally again.  I then reset my Actiontec wireless cable router back to factory settings, and set it up as I had before with nothing configured for NAT, and it still does not work.  Even though it had been working fine for a few weeks.

So, for the time being I have my SPA2102 acting as a router ( inconvenient because my phone cables are some distance away ), with one wireless phone attached, and my other line forwarding to the other.

I guess I have to blame my Actiontec router ... but it seems so odd that it should work before, and not now.