i have a Obi Device setup with a google account(google user 1). now, i have added another user a friend(google user 2 in a different country and timezone) to the google user 1 so that google user 2 can call my Obi device(gmail user 1) from their computer.when they call me, i am able to hear them just fine, but they cannot hear me at all. initially i thought the one way audio is related to NAT/Firewall issue. i changed 3 routers and the outcome is the same. i realized the router was not the issue since the google user 2 can call my computer (also logged into gtalk as a different user) and we are able to converse just fine.
so i believe it is more related to ObiDevice than anything else.
Attached is the call statistics. i see the peer clock differential rate in the high negatives.