Slower connection to Xfinity than shown (15 minutes), but if you're patient this will self-register. I took a different route and attempted to add the MAC address into my list of authorized Xfinity devices through their app, but requires continuious network connectivity, So once you've disconnected your old cable modem (unless you have a splitter), your internet goes down.
My experience was just over 30 minutes, but it works perfect. The 4-5 page fold out instructions show different variations of blinking, pulsing, or steady light to indicate status. The modem will restart several times as it binds to your provider, downloads updates, and reboots, but the lights are a very mellow version of status. When it is all the way online and functional, it will be a solid wite light. The light is neither distracting nor obnioxious.
I run a TPLink Archer BE800 Wifi 7 Router, and that also took a few minutes to integrate, but the delay was on me having forgotten that one of the 2 10G ports is primary. Once I remembered that I was up instantly.
I greatly appreciate the small and blend into the background nature of the modem. So many of the cable modems are a loud color, tall, or Christmas Tree of bright indicator lights.
This modem focuses specifically on a connection to your cable provider, and does not address wifi, or providing additional ports. It is perfect for my needs since I have the new TPLink Archer. This for me was a choice with specific intent, as I like function separation, that way if one fails the cost to get back on line is far less expensive. But from the selections currently available I did not see a combo Modem/Router that was DOCSIS 3.1 along with Wifi 7 and 10 G ports.
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$164.97 with 8 percent savings
List Price: $179.99 
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This item: Motorola MB8600 DOCSIS 3.1 Cable Modem - Approved for Comcast Xfinity, Cox, and Charter Spectrum, Supports Cable Plans up to 1000 Mbps | 1 Gbps Ethernet Port
$164.97
Get it Jun 6 - 9
Usually ships within 5 to 6 days
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$58.09
Get it as soon as Tuesday, May 27
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This Item  Motorola MB8600 DOCSIS 3.1 Cable Modem - Approved for Comcast Xfinity, Cox, and Charter Spectrum, Supports Cable Plans up to 1000 Mbps | 1 Gbps Ethernet Port | Recommendations  |  |  |  |  | |
| Price | -8% $164.97 List: $179.99 | $299.99 | -43% $118.99 List: $209.99 | $187.13 | -37% $119.99 New Price: $189.00 | $74.99 |
| Delivery | Get it Jun 6 - 9 | Get it as soon as Tuesday, May 27 | Get it as soon as Tuesday, May 27 | Get it as soon as Tuesday, May 27 | Get it as soon as Tuesday, May 27 | Get it as soon as Sunday, Jun 8 |
| Customer Ratings | ||||||
| Sold By | RBS Logistics | Amazon.com | Hitron Americas | Premier LogiTech | Verdi! | GemMintArena |
| connectivity tech | Cable | Ethernet | Ethernet | Wi-Fi, Ethernet | Ethernet | Ethernet |
| ethernet ports | 2 | 2 | 1 | 4 | 2 | 1 |
| number of ports | 6 | 2 | 1 | 4 | 2 | 4 |
| data transfer rate | 6 gigabits per second | 1000 megabits per second | 2.5 gigabits per second | 1 gigabits per second | 2500 megabits per second | 686 megabits per second |
| max downstream rate | 686 megabits per second | 1 gigabits per second | 2500 megabits per second | 1000 megabits per second | — | 686 megabits per second |
| max upstream rate | 1 gigabits per second | 200 megabits per second | 700 megabits per second | — | — | — |
| modem type | dsl | cable | cable | cable | dsl | cable |
| internet service provider | xfinity, spectrum, cox, optimum | spectrum, optimum, cox, xfinity, and more | Xfinity from Comcast, Cox Gigablast, Charter Spectrum, Astound, Grande, RCN, Wave, Zito Media | Xfinity, Cox | Cox, Spectrum, Xfinity | Xfinity, Charter Spectrum, Time Warner Cable, Cox, BrightHouse |
Product Description
The smart choice for your cable Internet service
Eliminate monthly cable modem rental fees – Typically saves 156 dollars per year in Xfinity cable modem rental fees. Actual savings depend on your service provider.
1,000+ Mbps – Maximum actual Internet download speed
GigE Ethernet port – For a high-speed wired connection to any router, computer, or other Internet-capable device.
Connect any WiFi router you choose
Plugs easily into any router for shared Internet access by all your WiFi and Ethernet-capable devices. This flexible approach lets you pair this cable modem with any router you choose for your WiFi needs, including a mesh router or gaming router.
If the MB8600’s Ethernet port isn’t used for a router, it can plug into a computer, HDTV, game station, or other Ethernet device.
Compatible with Most Cable Providers
Certified by Comcast Xfinity, Cox, and other cable providers.*†
* Not compatible with Verizon, AT&T, CenturyLink, and other fiber optic, satellite, or DSL services.
† This cable modem does not have telephone jacks for the support of voice calls.
Ultra-Fast Internet Speed
For other service providers, supported service speeds are similar to Comcast.
Easy Setup
Connects fast with just 3 connections – power, coax cable, and Ethernet.
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| Customer Reviews |
6,885
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29,318
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| Price | $74.99 | $99.85 | $164.97 | — no data |
| Product Type (This table only includes cable modems with NO built-in WiFi router) | 16x4 Cable Modem | 24x8 Cable Modem | DOCSIS 3.1 plus 32x8 3.0 Cable Modem | DOCSIS 3.1 plus 32x8 3.0 Cable Modem |
| DOCSIS Channel Bonding | 16x4 DOCSIS 3.0 | 24x8 DOCSIS 3.0 | DOCSIS 3.1 plus 32x8 DOCSIS 3.0 | DOCSIS 3.1 plus 32x8 DOCSIS 3.0 |
| Certified for These Cable Internet Services. Typically Works with Many Others. | Comcast Xfinity, Cox, Spectrum, Suddenlink, Sparklight (CableOne) | Comcast Xfinity, Cox, Spectrum, Suddenlink, Sparklight (CableOne) | Comcast Xfinity, Cox | Comcast Xfinity and Cox |
| Recommended by Comcast Xfinity for Internet Service This Speed Tier or Below | 300 Mbps | 600 Mbps | 1000 Mbps | 1000 Mbps |
| Maximum Internet Download Speed (Actual speeds are lower) | 686 Mbps | 1000+ Mbps | 6000 Mbps | 1 Gbps |
| Built-in WiFi Router | No | No | No | No |
| Built-in Telephone Port | No | No | No | No |
| Works With Any WiFi Router That Has an Ethernet WAN port | ✓ | ✓ | ✓ | ✓ |
| 2.5G Ethernet Port | no data | no data | no data | ✓ |
Product information
| Product Dimensions | 7.25 x 2.25 x 7.88 inches |
|---|---|
| Item Weight | 1.09 ounces |
| ASIN | B0723599RQ |
| Item model number | MB8600 |
| Customer Reviews |
4.3 out of 5 stars |
| Best Sellers Rank | #19,855 in Electronics (See Top 100 in Electronics) #37 in Computer Networking Modems |
| Is Discontinued By Manufacturer | No |
| Date First Available | May 17, 2017 |
| Manufacturer | MTRLC LLC |
Warranty & Support
Product Warranty: For warranty information about this product, please click here
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Motorola MB8600 DOCSIS 3.1 Cable Modem - Approved for Comcast Xfinity, Cox, and Charter Spectrum, Supports Cable Plans up to 1000 Mbps | 1 Gbps Ethernet Port
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A Great DOCSIS 3.0 Modem!
This DOCSIS 3.0 modem is hard to beat! It features 24X8 channels, and supports a theoretical 900 MBPS. While that's a theoretical data transfer rating, you should still be able to get up to 650 MBPS with this modem, which is about as good as it gets with DOCSIS 3.0. Interestingly enough, I bought this modem to replace a DOCSIS 3.1 modem that quite working reliably with my ISP. After 5 trips to my house, and after eliminating every other possibility of causes for intermittent internet drops, my ISP tech finally brought over one of their DOCSIS 3.0 modems, which worked flawlessly. It seems someone in their networking department changed software settings. Regardless, this modem performs flawlessly with my ISP, consistently delivering 400 MBPS + download speeds without dropping service. It also does NOT have the Intel PUMA chipset, which has been known to cause problems. The size of the case is a little on the tall side, but not objectionably so in my application. It pairs up well with a TP-Link Deco XE75 mesh system to deliver consistent, reliable internet service. I highly recommend it!
Top reviews from the United States
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- Reviewed in the United States on April 24, 2025Size: compact DOCSIS 3.1 (2.5 Gbps Ethernet Port)Verified Purchase
- Reviewed in the United States on May 13, 2025Size: compact DOCSIS 3.1 (2.5 Gbps Ethernet Port)Verified Purchase
- Reviewed in the United States on April 1, 2025Size: DOCSIS 3.0 (1 Gbps Ethernet Port)Verified Purchase
This DOCSIS 3.0 modem is hard to beat! It features 24X8 channels, and supports a theoretical 900 MBPS. While that's a theoretical data transfer rating, you should still be able to get up to 650 MBPS with this modem, which is about as good as it gets with DOCSIS 3.0. Interestingly enough, I bought this modem to replace a DOCSIS 3.1 modem that quite working reliably with my ISP. After 5 trips to my house, and after eliminating every other possibility of causes for intermittent internet drops, my ISP tech finally brought over one of their DOCSIS 3.0 modems, which worked flawlessly. It seems someone in their networking department changed software settings. Regardless, this modem performs flawlessly with my ISP, consistently delivering 400 MBPS + download speeds without dropping service. It also does NOT have the Intel PUMA chipset, which has been known to cause problems. The size of the case is a little on the tall side, but not objectionably so in my application. It pairs up well with a TP-Link Deco XE75 mesh system to deliver consistent, reliable internet service. I highly recommend it!
Images in this review
- Reviewed in the United States on March 18, 2025Size: DOCSIS 3.1 (2.5 Gbps Ethernet Port)Verified Purchase
