Sorry about the delay in getting back to you folks.
Been out of town for a bit.
It occurred to me after trying the suggestions posted here (a special thanks to all who participated), and having no positive improvement, that I may have unintentionally left out an important bit of information.
Our primary use of this device, is to reduce long distance telephone charges on our land-line.
Therefore, we not only have it connected to a telephone, but to the land-line as well.
NOTE: we DO NOT use GoogleVoice for messaging.
The echo/feedback DOES NOT OCCUR when the GoogleVoice number is dialed by the caller.
In fact, the call quality is good.
***The problem happens when the land-line is dialed by the caller, and then picked up at the phone connected to the OBi110.
So, to clarify:
1. All OUTGOING calls from any phone - Quality GOOD
2. INCOMING calls received by 'Land-line only' phone(not connected to the OBi110) - Quality GOOD
3. INCOMING calls received by the OBi110 when the GoogleVoice number is dialed - Quality GOOD
4. INCOMING calls received by the OBi110 when the Land-line number is dialed - Quality VERY BAD (severe echo/feedback)
5. Final symptom - The land-line phone will ring about 5 sec. BEFORE the OBi110 phone rings (when the INCOMING call is to the land-line number).
6. I deleted the device from the OBi 'dashboard', did a 'factory reset' of the OBi110, and re-created/reconnected it to the 'dashboard'.
Lastly, there is no problem with the land-line itself, or any of the phones used (had the phone company over to test everything, to assist with diagnosis)
There, you have it.
Hope this information helps some of you OBi-Wizards out in OBi-Land to understand this perplexing issue.
Peace All