Hello-

I have a T-Mo 8320, running 4.5. My T-Mo signal at home is poor, and so I added the T Mo Linksys router and the At Home service. While the UMA has always been a little spotty, lately it has gotten worse.

I can connect to either an incoming or outgoing call, and after about 10 seconds, I am cut off and get the “Call Failed” message. Then I can’t reconnect for a period of time. I have scanned the forum, but have not found any thoughts on this, so I wonder if anyone else has had this issue and found a solution.

Any thoughts will be appreciated!!

Who's the service provider for your internet and what kind of router did they provide? There might be settings you have to change in their device to prioritize the Tmobile Linksys router data.

Also, for voice applications, speed of the network is not the only consideration, the information has to flow through steadily. A website can load with all the pictures and things arriving in any order but voice data has to arrive in time to be put in the right order.

Test your connection with a VOIP test:

MySpeed VoIP connection test, VoIP test, test VoIP performance, test VoIP quality

Thank you for your advice!

My internet provider is ATT (formerly BellSouth).

I ran the test you suggested and things for VOIP check out in good shape:

Download speed of 3.06 Mbps is high enough to support a high quality VOIP connection.

Upload is 381 kbps is high enought to support a high quality VOIP connection.

Quality of service is 93%.

Jitter is 1.3 ms for VOIP of good quality.

I did see that there is some issue of handoffs between T Mobile and UMA, so I have disabled the T Mobile signal this afternoon and am making some calls to see if that helps solve the issue. After three or four calls of different lengths, so far so good...

Oh...the router provided by ATT is a Westell C-90.

If you're getting drops as the phone is handing off, in options is the mobile network preferred or wifi preferred?

Manage Connections/Mobile Network Options/Connection Preference

If you set it to wifi it should try to stick with wifi rather than handing it off.

It is on wifi preferred.

Should I change it to wifi only?

Thanks again for your help!

Check for sources of interference. Cordless phones and other routers operating at 2.4ghz will degrade your signal. If you use cordless handsets with your TM@Home make sure they're 5.8ghz or DECT 6 phones. Also, try changing the wireless channel on your router. We live in a condo and changing the wireless channel to 11 reduced interference from other routers in the building.

Whether you turn the mobile network off or choose wifi only is up to you. Both are a pain to keep turning off and on when you leave and hopefully the real problem can be fixed.

I had a very unstable DSL connection when I had DSL so I'm still wary of DSL. Can you get into the settings on the Westell C-90? If so, perhaps there's some QOS or similar setting you can change to prioritize the Tmobile router. Or maybe prioritize the phone and connect direct to the Westell.

Based on it seeming to work ok on wifi only - perhaps there's some interference on the channel the Tmobile router is on. Maybe it's even on the same channel as the Westell. Or your neighbors are or a cordless home phone is.

I've got BellSouth DSL Lite and my calls are pretty clear. I've noticed some delay when I'm on the phone, using wifi on my ps3 and downloading files for work. Other than those few instances, the service is fantastic.

Thanks to all who replied.

I changed my router channel from 6 to 11 a few days ago and have not had a problem with dropped calls since.

Thanks for posting back with the answer.

My Mama always said to say "Thanks"!!!