Best Isdn Modems in 2026

Daisy
Last Updated: Feb 6, 2026

At a Glance: Our Top Picks for Isdn Modems

ARRIS SURFboard SB8200 DOCSIS 3.1 Cable Modem | Approved for Comcast Xfinity, Cox, Charter Spectrum, & more | Two 1 Gbps Ports | 1 Gbps Max Internet Speeds | 4 OFDM Channels | 2 Year Warranty,White
#TOP1
Arris Surfboard Sb8200 Docsis 3.1 Cable Modem |
9.9
PM SCORE
ARRIS Surfboard S33 DOCSIS 3.1 Multi-Gigabit Cable Modem | Approved for Comcast Xfinity, Cox, Spectrum & More | 1 & 2.5 Gbps Ports | 2.5 Gbps Max Internet Speeds | 4 OFDM Channels | 2 Year Warranty
#TOP2
Arris Surfboard S33 Docsis 3.1 Multi-Gigabit Cable Modem
9.7
PM SCORE
NETGEAR Nighthawk Cable Modem CM1200 - Compatible with all Cable Providers including Xfinity by Comcast, Spectrum, Cox | For Cable Plans Up to 2 Gigabits | 4 x 1G Ethernet ports | DOCSIS 3.1, Black
#TOP3
Netgear Nighthawk Cable Modem Cm1200 - Compatible With
9.6
PM SCORE

* PickSmartly editors independently research, review, and endorse the top products through comprehensive data analysis. We may earn a commission for qualifying purchases made through our product links.

Summary of the Best Isdn Modems of 2026

Arris Surfboard Sb8200 Docsis 3.1 Cable Modem | Approved For Comcast Xfinity, Cox, Charter Spectrum, & More | Two 1 Gbps Ports | 1 Gbps Max Internet Speeds | 4 Ofdm Channels | 2 Year Warranty,White

ARRIS
SB8200
5.00 X 2.00 X 5.00 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

A Trusted Name in Home Connectivity: Better connectivity, better speed. The ARRIS SURFboard SB8200 DOCSIS 3.1 Cable Modem is designed to bring you superior connectivity, increase your network capability and provide faster streaming and downloading throughout your home. From a trusted brand with over 260 million modems sold and growing.

Save Money: Own your modem and save. Reduce your cable bill up to $168 dollars per year in cable modem rental fees (Savings vary by cable service provider). Certified for use with most U.S. cable internet service providers. For a complete list see additional details below.

Modem Technology: DOCSIS 3.1 is the newest technology available from cable internet providers. Its 10x faster than DOCSIS 3.0, provides better security, reduces lag while gaming & enables multi-gig networking (ability to run fast speeds on your copper cable from your internet provider).

Simple and Secure Set-up: Plug-in the device, download the SURFboard Central App, and follow the instructions to activate the modem. Connect to a Wi-Fi router for networking.

Compatibility: The SURFboard SB8200 is compatible with major U.S. cable internet providers including Cox (Gigablast), Spectrum (Internet Gig), Xfinity (Blast!/Extreme Pro) and others. It's approved for cable internet speed plans up to 1-Gbps. Check your Internet Service Provider (ISP) website to confirm compatibility.

What's in the Box: When you purchase you will get an ARRIS SURFboard SB8200 Cable Modem, Power Supply, Quick-Start guide, and 2-year warranty card.

Ethernet Ports: Has two 1-Gigabit ethernet ports to connect to a Wi-Fi router or other wired device.

Dedicated Customer Support: Live Chat and Phone Support available 8am -1am EST.

Warranty Provided by ARRIS: Product ships with 2-Year Limited Warranty.

Arris Surfboard S33 Docsis 3.1 Multi-Gigabit Cable Modem | Approved For Comcast Xfinity, Cox, Spectrum & More | 1 & 2.5 Gbps Ports | 2.5 Gbps Max Internet Speeds | 4 Ofdm Channels | 2 Year Warranty

ARRIS
S33
5.14 X 1.80 X 4.74 Inches
0.90 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

A Trusted Name in Home Connectivity: Better connectivity, better speed. The ARRIS SURFboard S33 DOCSIS 3.1 Cable Modem is designed to bring you superior connectivity, increase your network capability and provide faster streaming and downloading throughout your home. From a trusted brand with over 260 million modems sold and growing. .Dedicated Customer Support: Live Chat and Phone Support available 8am -1am EST.Warranty Provided by ARRIS: Product ships with 2-Year Limited Warranty.

Save Money: Own your modem and save. Reduce your cable bill up to $168 dollars per year in cable modem rental fees (Savings vary by cable service provider). Certified for use with most U.S. cable internet service providers. For a complete list see additional details below.

Modem Technology: DOCSIS 3.1 is the newest technology available from cable internet providers. Its 10x faster than DOCSIS 3.0, provides better security, reduces lag while gaming & enables multi-gig networking (ability to run fast speeds on your copper cable from your internet provider).

Simple and Secure Set-up: Plug-in the device, download the SURFboard Central App, and follow the instructions to activate the modem. Connect to a Wi-Fi router for networking.

Compatibility: The SURFboard S33 is compatible with major U.S. cable internet providers including Cox (Gigablast), Spectrum (Internet Gig), Xfinity (Blast!/Extreme Pro) and others. It's approved for cable internet speed plans up to 2.5-Gbps. Check your Internet Service Provider (ISP) website to confirm compatibility.

What's in the Box: When you purchase you will get an ARRIS SURFboard S33 Cable Modem, Power Supply, Quick-Start guide, and 2-year warranty card.

Ethernet Ports: Has one 2.5-Gigabit ethernet port and one 1-Gigabit ethernet port to connect to a Wi-Fi router or other wired device.

Dedicated Customer Support: Live Chat and Phone Support available 8am -1am EST.

Warranty Provided by ARRIS: Product ships with 2-Year Limited Warranty.

32 downstream x 8 upstream DOCSIS 3.0 bonded channels

Netgear Nighthawk Cable Modem Cm1200 - Compatible With All Cable Providers Including Xfinity By Comcast, Spectrum, Cox | For Cable Plans Up To 2 Gigabits | 4 X 1G Ethernet Ports | Docsis 3.1, Black

NETGEAR
CM1200-100NAS
6.10 X 3.40 X 10.30 Inches
1.22 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
The Wonder Stuff 5.89

Features

Compatible with all major cable internet providers with internet speed up to 2Gbps. Currently certified with Spectrum and Cox (up to 1Gbps) and Xfinity (up to 800Mbps). Future speeds with these service providers may change over time. Not compatible with Verizon, AT&T, CenturyLink, DSL providers, DirecTV, DISH and any bundled voice service

Works with any WiFi router: Connect any WiFi router to this modem’s Ethernet port to support all your wireless devices

Save monthly rental fees: Model CM1200 replaces your cable modem saving you up to 168 dollars/yr in equipment rental fees

Four (4) Gigabit Ethernet ports give you fast wired connections to your computer, separate WiFi router, printer, game box, and other devices

Modem technology: Engineered with 32x8 channel bonding, OFDM 2x2, and DOCSIS 3.1

Multi-gig ethernet: Link aggregation combines two 1G ports into one 2G port for faster wired ethernet speed.

Please check your Cable Internet Service Provider web site for data speed tier compatibility and to ensure it provides DOCSIS 3.1 service, otherwise this modem will only work as a DOCSIS 3.0 modem Not compatible with Cable bundled voice services

INCLUDES : Nighthawk Multi-Gig Speed Cable Modem—DOCSIS 3.1 (CM1200), Ethernet , cable, Quick install guide, Power adapter

Arris Surfboard Sb8200-Rb Docsis 3.1 Cable Modem | Approved For Comcast Xfinity, Cox, Charter Spectrum, & More | Two 1 Gbps Ports | 1 Gbps Max Internet Speeds | 4 Ofdm Channels (Renewed)

ARRIS
SB8200-RB
1.65 X 5.24 X 5.24 Inches
1.00 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

DOCSIS 3.1 cable modem best for cable internet speed plans up to 2 Gbps*..DOCSIS 3.1 cable modem best for cable internet speed plans up to 2 Gbps*.Compatible with Xfinity Comcast, Charter Spectrum, Cox, and other major U.S. cable internet providers.32 downstream x 8 upstream DOCSIS 3.0 bonded channels, or 2 downstream x 2 upstream OFDM DOCSIS 3.1 channels.Two 1-Gigabit Ethernet portsEasily setup your modem with the SURFboard Central app

Compatible with Xfinity Comcast, Charter Spectrum, Cox, and other major U.S. cable internet providers.

32 downstream x 8 upstream DOCSIS 3.0 bonded channels, or 2 downstream x 2 upstream OFDM DOCSIS 3.1 channels.

Two 1-Gigabit Ethernet ports

Easily setup your modem with the SURFboard Central app

Arris Surfboard Sb6190-Rb Docsis 3.0 Cable Modem, White (Renewed)

ARRIS
SB6190-RB
1.75 X 5.13 X 5.25 Inches
1.13 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Detroit Packing Co 5.05

Features

Requires cable internet service. Compatible with major U.S. Cable Providers like Xfinity, Spectrum, Cox, Suddenlink, Mediacom, etc. Not compatible with ATT, Verizon or CenturyLink.

32 DOWNLOAD & 8 UPLOAD channels to future proof your modem as your Cable ISP enhances service offerings. Recommended for plans up to 800 Mbps

Supports IPv4 and IPv6 – the latest Internet standard

90 Day Warranty. ARRIS Certified Refurbished. US Technical support

Arris Surfboard Sb6183-Rb Docsis 3.0 16X4 Cable Modem| Approved On Xfinity, Cox, Spectrum And Most Docsis Cable Internet Providers| Plans Up To 400 Mbps (Renewed)

ARRIS
SB6183-RB
2.13 X 5.00 X 5.25 Inches
1.00 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
BlueDealz 9.39

Features

APPROVED with Comcast Xfinity, Spectrum (Charter, Time Warner, Brighthouse), Cox and more. If not sure call your cable provider to find out if approved to use. REQUIRES Cable Internet Service. Not compatible with: Verizon, AT&T, or CenturyLink

Cable Modem only (no WiFi router). NO support for Cable TELCO options

Internet speeds up to 686 Mbps on 16 Download Channels and 131 Mbps on 4 Upload Channels, based on your cable ISP subscription. Approved for plans up to 400Mbps. Gigabit Ethernet port to connect to computer or router

Great for streaming HD Video and gaming on multiple devices at a time

90 Day Warranty. ARRIS Certified Refurbished. US Technical support. ARRIS Certified Refurbished products will ALWAYS be branded ARRIS, Never Motorola! If you get Motorola branded product they are illegitimate, need to be returned to Seller and Reported to Amazon

Verizon Mifi Usb620L U620L 4G Lte Global Usb Modem Black,Verizon

NOVATEL WIRELESS
U620L
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Connected Hotspots 0.00

Features

Please check compatibility with your device before purchase

Network: Verizon Wireless

Color: Black

Model: Verizon Novatel USB620L

Type: USB Model

#TOP8

Eicon Diva Lan Isdn Modem - Isdn Terminal Adapter - External - Isdn Bri St - 128 Kbps - 1 Digital Port(S) / 2 Analog Port(S) - Ethernet, Isdn

EICON NETWORKS
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
dintebi 9.57

Features

Ease-of-Use

Always On/Dynamic ISDN

Complete Multi-User Communications System

Inseego Sk160Ne-Acr Skyus 160 Lte Cat 6 Modem, Na, Ac Power

INSEEGO
SK160NE-ACR
1.00 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Konnected Concepts 5.05

Features

GPS: NMEA or TAIP Protocol

ANTENNA CONNECTIVITY: 2x SMAs for External Cellular Antennas; 1x SMA for External GNSS Antenna, Internal Wi-Fi/BT Antennas

WIFI TECHNOLOGY: Wi-Fi 5 (802.11 b/g/n/ac) up to 20 clients

Built-in battery for instant failover and business continuity

Versatility for any installation

Top 10 modems isdn Brands on Amazon

Here is the list of top-rated brands that were evaluated by PM.

Brand Count
Arris 5
Eicon Networks 1
Inseego 1
Netgear 1
Novatel Wireless 1

Top 10 modems isdn Brands Pie Chart


We've carried out a comprehensive analysis of 33,496 reviews on modems isdn, using our selection criteria to identify the best options in the categories. Our findings reveal that most customers typically select modems isdn priced around $127.40, with top brands including arris, novatel wireless, motorola, netgear, xxone and duttek and gryphon

Our team of expert editors reviewed these high-quality items and handpicked the top 9 modems isdn for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the categories category. These include amazon.com, connected hotspots, mtrlc llc, prime deals group, the wonder stuff, detroit packing co, xxone, bluedealz and garcia wares and duttek .

We are dedicated to assisting our users in finding the right modems Products based on their needs, saving them considerable time when choosing which modems isdn to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.