What do the signal stats look like ? Please post the *Downstream Power Level*, the *Upstream Power Level*, and the *SNR* (Signal to Noise Ratio) numbers.
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I am not a Comcast employee. I am a paying customer just like you! I am an XFINITY Forum Expert and I am here to help. We ask that you post publicly so people with similar questions may benefit. Was your question answered? Mark it as an accepted solution!
I am not a Comcast employee.
Was your question answered? Mark it as a solution!
If you have a combo VoIP & IP modem from your cable company, make sure that THE CABLE COMPANY DOES NOT HAVE THE IP modem side enabled!
My solution turned out to be, that the Comcast VoIP modem that had been installed in my house, had the WAN port enabled. Yes, my Comcast VoIP modem / aka "media version" (comcast's name) has the ability to simultaneously be either / both a VoIP and Internet modem.
However, comcast only allows an end user to have one "active" Internet modem enabled on the coax so, ... I had my Motorola SBG6580 "fighting" with the Comcast VoIP / Internet modem for which was getting the Comcast DHCP server IP address and Comcast's infrastructure not "liking me".
It took 1 year of my persistence & expertise (which most consumers wouldn't have) - many hours spent on the phone and with techs coming to my house telling me it was my personal cable modem, router, switch (anything in my home network that I had connected to the coax) that was the problem - to finally get Comcast to "escalate" my issue to an infrastructure engineer in the regional branch office to "look at their infrastructure equipment logs" to see what the problem was .... and in short order of "the right" Comcast person actually looking, it took less than a day to find the "conflicting" Internet modem issue as the Comcast VoIP (and IP) modem having its IP side incorrectly enabled (I'd even asked about this when it was installed, so why I'd not considered it to possibly be the culprit). Once the IP side of the Comcast leased equipment was disabled, I've been running rock solid, without the constant rebooting, internet outages, ... and long phone calls and home visits with Comcast.
NOT a problem with the Motorola SBG6580 (or any of the other networking gear gathering dust I had to purchase)!
I wish to commend five Comcast people: Sara (#40A - of the Rockford office), Melina (of the "make it right" team), and Johnny / Juantan B. / Markus (#0AV) (of the Elmhurst Field team) for their professionalism, courtesy, and 'solve the problem' (vice figure out how to point the finger at the customer and not do anything) spirit.
The longer version of this story would trod heavily on common lore such as, "evil cable company", but we'll avoid going there. Instead, I'll apologize on Comcast's behalf to the great support people I ended up talking with about "the problem with their equipment" at: Motorola, Netgear, Cisco, Airlink101, and Trendnet.
I had this All-in-one consistantly loose connection. Not only did I have it drop off and come back online after a couple minutes, it would also loose connection completely and I would have to unplug and replug it in to re-establish a connection.
So, I read a lot of threads on this issue and I also called Motorola and Comcast. Motorola says call Comcast, Comcast says to call Motorola. Noone seems to want to take responsibility.
Anyway, I did use one bit of useful information from motorola. They had asked what I named my service and what kind of password I used. They said my Network Name was too long and it should be simpler. They also said my Password was too complicated. I thought this was a bunch of BS but, I did try to simplify my password.
Well for weeks my internet would NOT kick out. It would go out temporarily for a very short amount of time but, I never had to un-plug and re-plug.
So, recently I had my Email hacked,(Probably no Relevance) but, this made me change the router access User and Password. As soon as i did, the internet went back to its old self. Even worse at that...
My question to everyone is? For those who have it working flawlessly, are you using the default user and pass to access the router? Do you also have a simple Network name and a simple password? I also put the router in the garage as close to the main line as I could. My garage is now heated and wasnt before. Is it also possible, the router over heats and kickes out?
These are the 3 things are different since it started going out: 1. Router access, Useer and Pass changed from default to my own, 2.Changed network Password and heat where the router sits now.
Long winded I know but, there has to be a reason why some people work and others dont. I had the Comcast rental modem and router and it never went out.
Hi, I used my SBG6580 with no issues for 14 months, then several days ago it stopped working. I would reset the modem and it would work for maybe a minute. Thinking the issue was my modem, i went to Best Buy and bought a brand new SBG6580 modem and again, the same issue. After 2 hours talking to comcast, they sent a tech out. He said the signal was fine and hooked up his modem and the internet works fine. He said it sounds like there is a compatability issue with the firmware on the SBG6580 after he tested both of my SBG6580 modems.