Arris Touchstone CM8200A DOCSIS 3.1 Ultra Fast Cable Modem - Gigabit

In this review of the Arris Touchstone CM8200A, the bottom line is simple: this modem is built for users who need a dedicated, high-performance cable modem to unlock gigabit-tier plans. Our review finds the CM8200A most appealing to households and small offices that want a compact, reliable device with DOCSIS 3.1 support and 32x8 channel bonding for sustained high throughput. Its single active Ethernet port keeps the setup straightforward, and several customers noted the modem paid for itself by replacing rental equipment.

Key Features

• DOCSIS 3.1 Technology: Provides the latest cable standard for higher capacity and lower latency compared with older modems, improving performance on multi-gig plans.
• 32x8 Channel Bonding: 32 downstream and 8 upstream channels deliver strong aggregate bandwidth so large downloads and multiple users stay responsive.
• Gigabit Speed: A gigabit-capable connection supports fast transfers for streaming, gaming, and remote work without throttling the primary device.
• Single Active Ethernet Port: Port 1 is the only active LAN connection, which simplifies configuration and ensures dedicated bandwidth to the primary device.
• Provider Compatibility: Engineered to work with major cable internet providers for residential and light commercial plans, reducing compatibility guesswork.
• Sleek Black Design: Compact housing in black fits into home or office setups while maintaining efficient heat dissipation during heavy use.

Who It's For

The CM8200A is aimed at users who have a gigabit or high-speed cable plan and want to stop renting a modem. It suits single-device primary connections such as a router, gateway, or a high-performance desktop that needs the full line rate through the active Ethernet port. Small business users with straightforward networking needs will appreciate the reliability and modern protocol support.

It is not ideal for setups that require multiple wired devices directly connected to the modem, since only Ethernet port 1 is active. Households that need built-in Wi-Fi, multiple LAN ports on the same unit, or integrated router features should look for a combined modem/router instead.

Pros & Cons

Pros

• Supports DOCSIS 3.1 for future-proofed performance on high-speed cable plans.
• 32x8 channel bonding provides strong sustained throughput for heavy usage.
• Many customers report easy installation and significant cost savings versus rental modems.
• Compact black design that stays discreet and cool in tight spaces.

Cons

• Only one active Ethernet port, so additional wired devices require a separate switch or router.
• Some users report mixed compatibility with certain providers or plans, so verification with your ISP is advised.

Specifications

Brand	Touchstone
Technology	DOCSIS 3.1
Channel Bonding	32x8 downstream/upstream
Active Ethernet Ports	1 (Ethernet port 1 only)
Speed Class	Gigabit capable
Color / Design	Compact black housing
Compatibility	Major cable internet providers (residential & commercial plans)

Our Verdict

The Arris Touchstone CM8200A is a practical buy for anyone with a gigabit or high-speed cable plan who wants a simple, reliable modem without rental fees. It delivers modern DOCSIS 3.1 performance and 32x8 bonding at a compact size, but buyers must accept the single active Ethernet port and confirm compatibility with their ISP before purchasing.

Frequently Asked Questions

Can I plug devices into both Ethernet ports?
Only Ethernet port 1 is active; a device connected to port 2 will not receive internet access.

Will this modem work with my cable provider?
The modem is engineered for major cable providers, but customers should verify support with their ISP and plan, as some reports show mixed compatibility.

Is this a modem-router combo?
No, the CM8200A is a standalone cable modem with a single active Ethernet port and does not include built-in Wi-Fi or router features.