I saw some posts indicating there have been issues with the MB8611 in recent years, and was wondering if that was ever resolved, or if I just need to buy a new modem. If anyone can share some insight, it would be appreciated. Modem is on software version 8611-19.2.18. Looking at the Internet Trouble

Hi there! Hoping someone can advise me on how to proceed. I've been having internet connection issues for several weeks, often worse on weekends and in evening but overall quite unpredictable and variable in timing. Some days I cannot stream a movie without the spinning circle and/or "you are not co

Forensic Explanation for Xfinity Support Issue Summary: After upgrading my service tier from 1 Gbps to 2 Gbps, my Motorola MB8611 received a new DOCSIS provisioning file that the modem cannot properly negotiate. Since that upgrade attempt, the modem is stuck in a degraded DOCSIS profile and will not

This morning I received a text notification that planned maintenance in my area had been completed. Since then, I’ve been experiencing internet connectivity issues. Current symptoms: • Upload speeds: ~0.06 Mbps • Download speeds: Normal for a few minutes, then nothing for a few minutes on and endles

This is yet another post for the constant drops in internet service related to the "Time Not Established" error that is repeated over and over again in the Event Log for the Motorola MB8611 modem. I have researched this issue in this forum and have discovered many others with the same issue - and it

My Motorola MB8611 cable modem (Hardware Version V1.0, Software Version 8611-19.2.18) logs critical events of type "UCD invalid or channel unusable" every few days and sometimes multiple times a day. My Comcast connection will go down for a few minutes, and then come back up. Using the Xfinity app o

I’m on the 2 Gbps plan using my own Motorola MB8611 modem. On the modem’s status page I only see 34 downstream bonded channels (DOCSIS 3.0), and no OFDM downstream channel listed. My speedtests top out at about 1.3 Gbps. Since DOCSIS 3.0 tops out around 1.3 Gbps, it looks like my modem hasn’t been p

Hello, We've had constant signal drops for years now on our Xfinity network. I've swapped out modems and routers. I've had multiple techs out, including one that recently ran new cable from the outdoor box into our home. And yet we still get drops every day, sometimes as bad as every hour or two whi

I am on my 4th service call and the issues continue. see below for more info. Connection Startup Sequence Startup StepStatusComment Acquire Downstream Channel423000000 HzLocked Upstream ConnectionOKOperational Boot StateOKOperational Configuration FileOK SecurityEnabledBPI+ Connection Status System

I recently upgraded my internet plan to the 1 GB package. After several support calls with xfinity support my download speed remains the same at around 700 Mbps and my upload worsened to 6 Mbps from the usual 40 Mbps. I bought my MB8611 last year and have been using it in preparation for the GB+ spe

Hi all, Since around July 15, I’ve been experiencing frequent short outages, usually twice a day, lasting about 2 to 3 minutes each. These interruptions have been happening consistently, often around 9AM and 10:00 PM, and are disrupting important business calls and meetings. The modem logs show: UCD