What kinds of third party SIP are you all having so much issue with? I manage a lot of accounts using the big, hosted providers and plenty of the endpoints sit behind Xfinity/Comcast boxes without issue.
The dropping registrations just sound like timer and firewall configurations. By rule, I try to always go bridged mode with Comcast provided boxes, but even when not I can't recall having an issue like this except via the normal things like ALG being enabled or some type of security inspections causing trouble. And TLS is the way 100% On Tue, Sep 10, 2024 at 12:19 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. > > >
