Hi, my customer-owned Motorola MB8611 restarts itself about twice a day, and I think it's stuck on old firmware. Details: What happens - The modem fully restarts. Its Ethernet link to my router drops and its uptime counter resets. Each outage lasts about 2 minutes. - My router logged 58 restarts bet

I have a customer-owned Motorola MB8611 DOCSIS 3.1 modem. The modem shows Network Access: Allowed, Boot State: Operational, Configuration File: OK, all downstream/upstream channels locked, downstream SNR around 40–43 dB, downstream power around +6 to +8 dBmV, and upstream around 42–46 dBmV. My route

As in the title. I have a modem, a Motorola MB8611, which can do 2.5 Gbps download and 800 Mbps upload. However, Xfinity says it only supports 35 Mbps, which is completely wrong, by a literal order of magnitude and then some - it literally supports over 20 times the speed Xfinity says it does, and 8

I need help escalating a storm-damaged Xfinity line. A large fallen tree pulled down the Xfinity communications line at my home. The utility company has replaced the damaged electrical pole, but Xfinity's line has not been reattached. My Internet has been out for 6 days. The line is hanging very low

Hi, I'm having an intermittent internet issue and would like to request a line technician visit rather than remote troubleshooting, since I'm pretty sure I've already isolated the cause on my end. Symptoms: My connection cycles between normal speed and very slow multiple times over a 30-minute perio

I replaced my old Motorola MB8611 with a Netgear CM3000 modem in the hopes of getting better upload speeds. I'm currently getting about 40 Mbps upload which is about the same as I was getting with the Motorola modem. In my account I still see the Motorola modem listed and I'm wondering if that is a

I have tried two modems. Netgear CM3000 and Motorola MB8611. They both exhibit the same issues. I have replaced the wall plate/coax outlet in the room. I then took the cable that runs directly to my house and ran it directly to my modem. Same issue. Techs come out and say nothing is wrong and move o

In mid-July I upgraded my internet speed plan from the 300 Mbps to the 1.2 Gbps plan. Unfortunately I still seem to be capped at approx 350 Mbps down and 4 Mbps up. I have rebooted, power-cycled and even reset to factory defaults my MB8611 modem but no change. Of course I power-cycled my router each

Hi all, I have the Gigabit x2 plan, yet when I bring up my account, it states I have download speeds up to 1.3 gbps. I have a Motorola MB8611 modem. Is this modem capping my speed? The modem is supposed to be able to handle speeds up to 2.5 gbps. I am wondering if this modem is not allowing me to re

My Motorola MB8611 Modem regularly reboots causing our internet to go down. It appears the firmware is very out of date and that Comcast is supposed to update it. How do I get it upgraded to the latest versions: Version on the modem: 8611-19.2.18 Current version available: 8611-21.3.7

Noticed huge drop in internet speed, from about 900mbps to 80mbps. Rebooted everything, same thing. Looked at my Motorola MB8611 event log after reboot, found these 2 errors: Time Not Established Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing Time Not Est

I am an Xfinity customer in Lafayette, CA experiencing repeated internet outages for years. My attempts to address the issue hasn't fixed the problems. Over the last 2 weeks, l got more serious about troubleshooting. I have done extensive technical troubleshooting and have documentation that points

Hi! I recently upgraded my modem from a Motorola MB8611 to a Netgear Nighthawk CM3000 specifically to take advantage of the Next-Generation (mid-split) upload speeds. Despite the CM3000 being a recommended device for these higher speeds, my upload is still capped at ~40 Mbps, which was the same limi