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About this product
Product Identifiers
BrandMotorola
MPNMB8611
UPC0855631006644
ModelDOCSIS 3.0
eBay Product ID (ePID)28045974033
Product Key Features
ColorBlack
DOCSIS StandardDOCSIS 3.1
ConnectivityEthernet (RJ-45) Hub/Switch
PortsEthernet (RJ-45)
TypeCable
Dimensions
Item Length7.5in.
Item Height7.8in.
Item Width2.2in.
Ratings and reviews
Most relevant reviews
- 19 Oct, 2021
Excellent Upgrade From Outdated DOCSIS 3.0 Modem!
We have previously been using a Zoom 5341J DOCSIS 3.0 modem with Comcast since 2012. Recently it began to have some issues with dropping the connection and being unable to access it via LAN unless it was restarted, and this issue was occuring more and more frequently. Besides, the Zoom modem was also outdated and no longer technically supported. Even though we were paying for 400 MB service we were only able to achieve about 260 MB with the unsupported DOCSIS 3.0 modem. However, once upgrading to this Motorola MB8611 DOCSIS 3.1 modem, all of our woes and issues have completely disappeared. Not only is our internet service rock solid, but now we are also surpassing the 400 MB package that we pay for. We couldn't be happier! I just hope this modem lasts just as long as the old Zoom modem did!Verified purchase: YesCondition: Pre-owned
- 13 Dec, 2021
Installation couldn't have been easier
Replaced a very similar model, MB8600. Comcast looks at the modem after it is plugged in, and accepts the change. No phone call required. This model is capable of higher speed, but 1.2 GBps is not available yet. If it comes, I will be ready.Verified purchase: YesCondition: New
- 14 Dec, 2021
Easy setup and super data rate!
I got an install of new Xfinity internet and to save money, I supplied the cable modem. Reason? Cable wanted an additional $15 a month if they supplied the modem. Plus, I would have to take whatever manufacturer's product was available. !!Verified purchase: YesCondition: New
- 15 Jun, 2021
Easy upgrade
Had to call my Xfinity to swap out my modem. We notice streaming shows is more reliable. We replaced a modem that was rated for a lower speed. Very happy with ordering and how quickly it arrived.Verified purchase: YesCondition: New
- 02 Sep, 2024
Not sure if Spectrum disables AQM, but I...
Not sure if Spectrum disables AQM, but I lost access to the config pages once it was activated and score a C on Waveform bufferbloat test with this device. Great unit when configured properly, but not sure all ISPs do so.Verified purchase: YesCondition: Pre-owned
- 03 Nov, 2023
Solid modem
Modem lives up to Motorola's standards. Took a while to set up with Xfinity's 1.2gbit and needed to get in contact with Xfinity directly, however once it was set up the modem performed just as expected with no issues.Verified purchase: YesCondition: Pre-owned
- 08 Sep, 2022
Works well, stable internet connection
There really isn't much involved with the set up. You need to call your internet provider give them the information written on the modem and they will activate it for you. The modem will only give you the speeds provided by your internet provider. It has been working fine for me, I have not had to reboot it. I get the speeds that I am paying for.Verified purchase: YesCondition: Pre-owned
- 03 Apr, 2022
It Works...
Set it up using my comcast network(Xfinity), It was detected using the Xfinity app. and was up and running at 900mbs in less than 10 min. tested with speedtest.com. My speed with Xfinity is 900mbs.Verified purchase: YesCondition: Pre-owned
- 13 Apr, 2023
Faster than my 3.0 modem
The modem is fast, but it is dropping the internet feed from Comcast once in awhile. There are YouTube videos about this behavior. Supposedly it is the software that Comcast is using to communicate with the modem that is the cause.Verified purchase: YesCondition: Pre-owned
- 15 Mar, 2025
Thanks very much! This MB8611 modem seem...
Thanks very much! This MB8611 modem seems to be working well, and my internet speed has increased! AAA+++Verified purchase: YesCondition: Pre-owned
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