Well this is curious....

Same issue... they are breaking something with registration. What region are you in? We are in North Central PA so we're routing

On 9/10/24 3:25 PM, Norman Jester wrote:
Your message is timely for me. I literally have the exact same issue. I setup 
phones for my daughter’s home and she got Xfinity. Everything worked for a few 
minutes then I could not keep phones registered after.

Norman Jester


On Sep 10, 2024, at 12:18 PM, Matt Hoppes <mattli...@rivervalleyinternet.net> 
wrote:

I have an employee who has recently switched to Xfinity cable service. Ever 
since they switched their internet service their work phones will not stay 
registered for more than about 3 minutes.

These same phones have been used on many ISPs without issues.  The same config 
has been used behind multiple levels of NAT without issues.

She was fine, until she switched to XFinity.

Of course, XFinity support is absolutely worthless.

Anyone from XFinity Tier 3 or such that might be able to offer assistance?

I suspect it's something stupid with either NAT overload in the modem or the 
modem not keeping the SIP channels open.

I've tried playing around with registration times without any success. And 
again, we've never had issues with these phones or this setup with any other 
ISP.


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