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Black rectangular cable modem model 8611 with 2.5 GbE port

Motorola

Motorola MB8611 DOCSIS 3.1 Cable Modem 2.5GbE Black

SKU CH-8SGT-7JEFX

A DOCSIS 3.1 cable modem with a 2.5Gb Ethernet port, 32x8 channel bonding and backward compatibility to DOCSIS 3.0

  • Product typeCable Modem
  • Ultra-fast DOCSIS 3.1 delivers multi-gigabit speeds
  • 5 Gbps Ethernet port enables faster wired connections
  • Active Queue Management reduces lag for gaming and streaming
  • Broadcom full-band capture tuner ensures reliable signal reception
  • Backward compatible with DOCSIS 3.0 32x8 channel bonding

What the Motorola MB8611 does

The Motorola MB8611 is a DOCSIS 3.1 cable modem built for households that subscribe to multi-gigabit internet tiers. It delivers the only standard capable of exceeding 1 Gbps downstream and works with Comcast Xfinity, Charter Spectrum and Cox. The 2.5 Gbps Ethernet port removes the bottleneck found on older 1 GbE modems.

Installation and common issues

Connect the coaxial cable, link the 2.5 Gbps Ethernet port to your router or PC, then activate the MAC address with your provider. No driver installation is required. The most frequent problem is forgetting to register the modem with the ISP, which leaves the link stuck in a provisioning loop. A power cycle after registration usually clears it.

The specification that decides fit

The 2.5 Gbps Ethernet port is the deciding factor. If your router or firewall only has 1 GbE ports you will not see speeds above 1 Gbps regardless of the modem capability. Buyers whose gear tops out at 1 GbE should note that the extra headroom cannot be used without a 2.5 GbE uplink.

How it compares

Measured against everything we stock in Cable Modems & Gateway Routers, at today’s prices. Recalculated every night.

Price $129.99
Typical for this category: the median of 122 items is $120.99.

Specifications

Product
Brand nameMOTOROLA
Product typeCable Modem

Questions about this item

How can I verify the Motorola MB8611 is delivering multi-gigabit speeds after installation?

Connect a device to the 2.5GbE port and run a speed test; the modem supports DOCSIS 3.1 tiers above 1 Gbps approved by Comcast Xfinity, Charter Spectrum, and Cox.

What comes with the MB8611 and what must I provide separately?

The box contains the cable modem; you must supply a coaxial cable for the wall outlet and a router or device with a 2.5 Gbps Ethernet port to use the full throughput.

Should I choose the 32x8 DOCSIS 3.1 model or a different version for future-proofing?

The MB8611 is a single 32x8 DOCSIS 3.1 variant with a 2.5GbE port; it covers all current multi-gig tiers and remains backward compatible with DOCSIS 3.0 networks.

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