I would call Comcast and complain that your modem keeps dropping its connection...the Comcast modem resets and one minute in to the call, the person on the other side is unable to hear us.
I can consistently reproduce this problem.
I did call them, but they are not able to help because all systems at their end are showing up fine. And Ooma is not responding back with any possible solutions as well.
To be a little fair on Comcast, it is "only" when a make a call to with Ooma that this happens. We've had comcast for a decade and it is only with a Ooma call that we are facing this problem. So i am inclined to believe this is a Ooma problem rather than a Comcast problem.
I am hoping that there is a simple configuration change that would solve this problem.
Thanks & Regards
1) I changed the Modem port MAC address in the Ooma setup (http://172.27.35.1) from "Automatic" to "Use Built-in". I then restarted the entire setup, but this did not help - same problem of call disconnect, one way voice and internet disconnect as before.
2) I placed the IP address that Ooma is using on the router in the DMZ of my router and restarted the entire setup and since then all is fine. No more dropped calls, no internet disconnect and no one way voice - all problems solved.
I don't know if it is a combination of 1 and 2 that did it, or just 2. But i am keeping these changes at this time.
To improve the call quality, i further changed the QoS settings:
a) upload speed to 1024 from 384
b) Reserved bandwidth for calls to 215 from 130
I will update this thread in a few days if anything changes.
Hope this helps others. Thanks to all.