I'm around Polk Street and Western in Chicago, IL (02-08-2014).
I have a very good Motorola Surfboard SB 6141 modem paired with an excellent NETGEAR R6300 router. I've had intermittent connectivity loss, all day long, every day for the past 4 weeks now. I have called Comcast about it well over 10 times and the intermittent disconnection and automatic reboots continue.
The NETGEAR router is new as of 02-06-2014 (replaced a very good, but older Belkin N wireless). There is an obvious improvement in that the disconnection has longer periods of uptime in between, but the service still isn't working, as it continues to disconnect throughout the day with 2.5 - 6 hour uptime in between (45 minute to 1.5 hour spans with the Belkin router).
I've had 3 Comcast techs visit now, one of which I believe just agreed with me without understanding or really having done anything and called the last tech to come. I also called to have the latest firmware update pushed to my SB 6141 modem (on 02-05-2014) and the agent told me that my modem had not even been registered into their system, which she completed. After the call when I entered my modem's config page to check what she did, it still had the same old, outdated firmware version loaded, and disconnections have continued as always.
A newly scheduled tech is supposed to come Sunday to install a filter between my coaxial cable and modem. I've almost lost all hope now, but I will say I believe the agent that set this up certainly sounded like he had real experience with my situation, as he had the same interpretation as the Motorola agent had when I called them to diagnose the situation from my modem. While within tolerance, my service is showing much higher than normal power levels on the downstream, which both associates immediately pointed to as a potential problem and cause for the intermittent signal outages.
If this last filter fix doesn't work, my next step will be to try a new modem (which drives me insane because everyone agrees, including Comcast, that my modem is perfectly fine, and is an excellent model) and if that still does not stop the disconnections, I will have to try my luck with the equally horrible AT&T.
If anyone knows how to get a Comcast agent to push a firmware update to your modem, please let me know, because I'm running out of options.
