Hello - I've been an Obitalk user for years from my home office.
Now there is no audio in / out after successfully placing a call. I can test to myself using a cell phone.
The firmware is up to date (OBi2xx-3-2-2-8680EX.fw). Have sometimes been able to reboot the Obihai, internet modem (275˅/18^) or handset (Panasonic KX-TGE) and temporarily regain voice ability, but that is no longer working and certainly there is no reliability.
What do you suggest for troubleshooting?