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Forum Discussion
CM1150v Intermittent Slowness and Channels not locking
Hello, Having an issue where the CM1150v modem I have went from perfectly fine to all of a sudden flashing the downstream light repeatedly. My speeds went from 300+ to about 20-30mbps. It's been ...
Same problem here with a CM1100 and Comcast. 2.01.02 firmware. No signal splitter. My 250 Mbps connection drops to about 30 Mbps until I reboot the modem.
Have you had the ISP check the signal and line quality up to the modem?
Might contact NG support and have them review any debug logs from when this happens.
coldcaffeine wrote:
Same problem here with a CM1100 and Comcast. 2.01.02 firmware. No signal splitter. My 250 Mbps connection drops to about 30 Mbps until I reboot the modem.
Haven't had a chance to try the modem directly on the line that comes into the house (in the attic), but that still would be completely unreasonable to not be able to have internet service and TV service at the same time -- a splitter is neccessary to provide this and has worked for years, including months with this modem. (And they just replaced this piece when there for this service call) It just happened all of a sudden 2 weeks ago that the downstream light started flashing and speeds dropping. Not sure if firmware related or Comcast line related or what. They tested all the lines all the way up to the modem. It's just so itermittent that I don't know how to tell anyone from Comcast how to see it since it's working for a day, then not for a day or working for a morning, then not at night. It's completely random.
This is still happening to me, the downstream light flashes and the speeds drop. The light stops flashing and the speeds go right back up.
I'll try to report back after I have a chance to test it on the line coming into the house when the problem is occuring.
:smileywink: