First GV call via Obi202, no audio in either direction

[NashWilliams]

I've done a number of searches on this, but haven't found anything that addresses my experience.  Has anyone had an issue where they place a call through an Obi202 via Google Voice, and the first attempt has no audio for either party, yet the call is set up and the distant end party accepts the call, but all subsequent calls work perfectly?  (Apologies for the obvious run-on sentence!)

This is primarily with outbound calls.  Sometimes this happens with inbound calls as well, but not as frequently.

[N7AS]

You can try disabling SIP ALG in your router settings. This is the first thing to do when you are having problems with no audio or one-way audio problems.