Same issue with me.

Selective incoming calls are not able to hear me.

My setup is Cable modem ---> Grandstream ATA ---> Netgear Router.

I am noticing a loose correlation to numbers I have put in my contact list being OK versus numbers not in my cantact list not being able to hear me.

Not sure it has anything to do with it, nor if it even makes sense, but thought I'd throw it out there.

I don't have any private call blocking set up. Even if I did, I wouldn't expect it to function this way.

Anyone gotten an update from VOIPo on this?