Useful info for the Comcast Business Voice Edge service:

The portal login is at https://voiceedge.comcast.com/ – at the time of this writing the security certificate is expired (way to go Cumcast)
To log in as admin, you must add TA to the end of your username authorized as administrator. For instance: rmutt1917TA

If your phones lose their settings including the provisioning server they will act really stupid. Press Menu -> Status -> Network to find the phone’s IP address then log into it from a web browser. On Polycom phones the admin password is 456

Go to Settings -> Provisioning Server. The Comcast business voice / Comcast BVE provisioning server address is http://bvedms01.wdv.comcast.net:80/dms/bw/host/wdv-7/dms-psip/
No password.
Server user: PlcmSpIp
Tag SN to UA disabled

If you have other WORKING phones on your network when this happens, please confirm the provisioning address on those first – the fact that it ends in 01 makes me wonder if this may vary regionally. (???)

Note that if the DHCP on your network provides an option 66 response to point phones to a TFTP server, the provisioning WILL fail as the phone is too dumb to proceed to the programmed provisioning server address. Once it gets a tftp address passed to it and this provisioning method fails, it will give up immediately and throw the toys right out of the pram. Wondering if your lan’s dhcp provides response 66? Did you set it to? If not, then it doesn’t. End of story. Honestly, most embedded device/router DHCP daemons don’t even support it.

You can use firmware versions later than what Comcast provides and I’ve had much better results doing so (better audio quality, fixes phone UI hangs/reboots….)
Go to Utilities -> Software Upgrade in the web UI. If you’ve never done this before, go ahead and select Polycom hosted server, click check for updates. The software version selector will populate. Choose the latest version and make it so.

If you HAVE done this before, do not click check for updates. The web UI and then the phone itself will freeze*. Uhhhh, it’s a feature, not a bug?! Click clear upgrade server. The phone will reboot, DOWNGRADE to whatever Comcast provides you, then you’ll be able to do the aforementioned procedure. Hey, we didn’t become Comcast customers because we wanted sane, reasonable, and logical services, did we?

* may be a model dependent thing. The SoundPoint 335 locks up like a dumb brick and eventually reboots itself, but the SoundStation will just do it all right. Who knows. I hate these things, they always make it sound like the person you’re talking to is actually talking waaaay too close to your ear and like you’re half expecting to spit down your ear canal or drool on your shoulder