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mtbuonocore's avatar
mtbuonocore
Aspirant
Apr 11, 2022

CM1200 Flashing Green Down and Upstream and LAN1 on XFinity

CM1200 on Xfinity, keeps dropping connections endlessly. It is connected to an Orbi mesh wifi router with 2 satelites. Orbi seems to be fine but Xfinity randomly says my CM1200 is offline even though its LEDs are showing a connection and I can access internet via wifi. Now I cant seem to keep a constant down or upstream connection. My download speeds are 500-600mb but my upload is 0.1-0.11, I have attached the logs. Any help or insight is appreciated. I have power cycled, checked connections, changed plugs, etc., still hasnt helped. 

3 Replies

    • mtbuonocore's avatar
      mtbuonocore
      Aspirant
      Apr 11, 2022

      Here is event log

      • plemans's avatar
        plemans
        Guru - Experienced User
        Apr 11, 2022

        You have a bunch of errors in your line. 

        Start with removing any amplifiers, signal attenuators, or splitters from the coax.
        From there check the line for kinks, damage, moisture in the line.
        Check the connectors for improperly made ends, foil touching the copper coax line, bad/old/cheap connectors, or corroded connections. Replace them if you do.
        If you can, simply connect the modem right where the coax comes into the home. This prevents wiring in the home from being the issue. And some ISP’s charge if the wiring issue is in the home. So this helps prevent this.

        Start with that. If you've done that, repost the upstream/downstream/logs again. Your power is a little high but you have a lot of errors.