said by NetFixer: said by Red_Weasel:
What is the difference between a "CMS" & "IMS" accounts?
What is the context of your question?
With regard to your original question involving an IMS modem, NCS and IMS are two different methods for handling VoIP calls (with IMS being the more advanced method). I don't know the context of your "CMS" reference (and in general usage, there are hundreds of possibilities for that particular acronym).
To expand on what my wife posted earlier today...
We had an old Arris TM402G eMTA that was having some...issues....so we went to the local service center which is still another town over. Anyway, we asked for a TM722G or one of the new 800 series Arris eMTA's and were told our options were either a TM602G or the new Xfinity Wireless Gateways which are Technicolor TC8305C MTA's. We opted for the TC8305C since it's DOCSIS 3 compliant.
Got it home, hooked it up, called the 800 number to have the device provisioned and then went about out merry way. Several minutes later we noticed that the Tel1 light was blinking and that we didn't have any phone service. Called up Comcast again and the tech told us that we would have to call a separate number to have the phone portion of the MTA activated. Called the number and heard a message that said "Please call back during business hours. Goodbye" and then disconnected. Waited about 30 mintues and tried using online chat.
After roughly 20 minutes of "troubleshooting" the CS rep tells me that our account is setup for "CMS" but the TC8305C is an IMS only device and that their system won't allow them to activate the phone port on the MTA. Thought that was a little odd and something I've never heard of, but we rolled with it until this morning. Figuring I just got someone last night who wasn't sure what was going on, my wife called the activation number and spoke with someone. The end result was the same.....they were unable to activate the phone portion because we're on a "CMS account" and the MTA only does IMS.--
I'll be stretching out the rhyme like gravity stretches time.