Arris SVG2482AC Xfinity Internet & Voice Modem Router

The refurbished Arris SURFboard SVG2482AC is a DOCSIS 3.0 cable modem, AC1750 dual-band WiFi router, and two-line telephone adapter in one box, built for Xfinity internet and Xfinity Voice. It is the low-cost way for Comcast customers with an internet and home phone bundle to own their equipment instead of paying a gateway rental fee every month. Every unit is inspected and tested by hand in the US and backed by our 90-day warranty and 30-day returns.

Key Takeaways

• Xfinity Voice support: two built-in telephone lines make this one of the very few retail modems that carries Comcast home phone service.
• Xfinity plans up to 800 Mbps: 24x8 DOCSIS 3.0 channel bonding, rated by Xfinity at up to 856 Mbps wired.
• Dual-band AC1750 WiFi plus four Gigabit Ethernet ports, managed from the free ARRIS SURFboard Manager app.
• Battery backup capable, so your phone line can stay up during a power outage (battery sold separately).
• Xfinity only. Not for Spectrum, Cox, fiber, DSL, satellite, or 5G home internet. Read the 2026 compatibility notes below before ordering.

Xfinity Compatibility in 2026: Read This First

In April 2026 Xfinity removed the SVG2482AC, along with every other DOCSIS 3.0 voice modem, from its public list of compatible retail devices. Since then, SVG2482AC units have continued to activate on Xfinity accounts for both internet and voice, and that is what we see with the units we sell. Activation is still at Xfinity's discretion, and a device that is off the retail list can lose support without notice.

Before you order, open the Xfinity app or the device checker at xfinity.com/support/devices, enter your address and plan, and confirm the SVG2482AC will activate for you. If Xfinity will not activate it, our 30-day return policy applies. Our Xfinity approved modem list tracks every change Comcast makes to the list, and our guide to Xfinity removing DOCSIS 3.0 modems explains the phase-out.

Why consider it anyway? The retail voice modems left on Xfinity's list are all DOCSIS 3.1 hardware sold new at several times this price, and the other option is renting the Comcast gateway at roughly $15 a month. For a household on a plan up to 800 Mbps that wants internet, WiFi, and home phone from one owned device, the SVG2482AC is still the least expensive path, with a return window if it does not activate.

Built for Xfinity Voice

Most retail modems handle internet only, which leaves Xfinity Voice customers renting the Comcast gateway just to keep their phone number. The SVG2482AC has two RJ-11 telephone ports made for Xfinity Voice, so internet and home phone both run through equipment you own. If you have a Comcast double-play or triple-play bundle and want the equipment fee gone, this is the modem built for that situation.

Not for Spectrum, Cox, Fiber, or DSL

Arris built the SVG2482AC for Xfinity, and its telephone ports work only with Xfinity Voice. Do not buy it for Spectrum: Spectrum stops supporting DOCSIS 3.0 modems after October 28, 2026. Cox is retiring DOCSIS 3.0 hardware as well, and Cox markets are following Spectrum's timeline now that Charter owns Cox. The SVG2482AC also does not work with fiber (Verizon Fios, AT&T Fiber, Google Fiber), DSL, satellite, or 5G home internet. Spectrum and Cox customers should shop our DOCSIS 3.1 modems instead.

WiFi and App Management

Dual-band WiFi delivers combined speeds up to 1750 Mbps across the 2.4 GHz and 5 GHz bands, enough for 4K streaming, gaming, and video calls in a typical home. The free ARRIS SURFboard Manager app lets you see connected devices, set internet access rules, and change WiFi settings from your phone without opening the admin page. If you prefer a separate router or mesh system, the SVG2482AC supports bridge mode, and our setup guide below walks through turning it on.

Battery Backup for Phone Service

With a compatible backup battery installed, the SVG2482AC keeps your Xfinity Voice line available for emergency calls during a power outage. That matters for households that rely on a home phone, including anyone with a medical alert or security system on the line. The backup battery is sold separately.

Setup and Activation

Connect the coax cable, plug a phone into Tel 1, plug in power, and wait for the lights to settle. Then activate at xfinity.com/activate, in the Xfinity app, or by calling Xfinity; voice customers may need a short call to move the phone number onto the new modem. Our Arris SVG2482AC setup and activation guide covers the full process step by step, plus the admin login, changing the WiFi name and password, bridge mode, parental controls, and factory reset.

Specifications

What's in the Box

• Arris SVG2482AC modem router (refurbished)
• Ethernet cable
• Power supply
• Online installation manual

Frequently Asked Questions

Does the Arris SVG2482AC work with Xfinity Voice?

Yes. It has two built-in telephone lines made for Xfinity Voice, which makes it one of the only retail modems that supports a Comcast internet and phone bundle in a single owned device.

Is the SVG2482AC still compatible with Xfinity in 2026?

Xfinity removed it from the public retail device list in April 2026, but units have continued to activate on Xfinity accounts since then. Check the Xfinity app or xfinity.com/support/devices for your address before ordering. If Xfinity will not activate it, our 30-day return policy applies.

Which Xfinity plans does it support?

Plans up to 800 Mbps. Xfinity rated the SVG2482AC at up to 856 Mbps wired. If you are on a gigabit or faster plan, or on a plan advertising faster uploads, you need a DOCSIS 3.1 modem from our Xfinity approved modem list.

Will the SVG2482AC work with Spectrum or Cox?

No. It was built for Xfinity, and its voice ports work only with Xfinity Voice. Spectrum ends support for all DOCSIS 3.0 modems after October 28, 2026, and Cox is retiring DOCSIS 3.0 hardware on the same track. Spectrum and Cox customers should choose a DOCSIS 3.1 modem approved for their provider.

Is DOCSIS 3.0 still good enough?

For Xfinity plans up to 800 Mbps, the SVG2482AC delivers the speed you pay for. The trade-off is longevity: Xfinity is retiring DOCSIS 3.0 and this model is already off the retail list, so it is a budget choice rather than a long-term one. If you do not need phone support, a DOCSIS 3.1 modem is the better long-term buy.

Does the SVG2482AC have built-in WiFi?

Yes. It includes a dual-band AC1750 WiFi router and four Gigabit Ethernet ports, so you do not need a separate router. You can also put it in bridge mode and use your own router or mesh system.

Does the battery backup come included?

No. The SVG2482AC is battery backup capable, but the battery is sold separately. With a battery installed, your Xfinity Voice line stays available for emergency calls during a power outage.

How do I activate the SVG2482AC on Xfinity?

Connect the coax, phone, and power, then activate at xfinity.com/activate, in the Xfinity app, or by calling Xfinity with the CM MAC address from the label. Voice customers may need a short call to move the phone number. The activation steps in our setup guide walk through it in order.

What do the lights on the SVG2482AC mean?

Blinking lights during boot are normal. After activation, the Power, DS, US, Online, and Tel lights should be solid. Persistent blinking usually points to a signal or provisioning issue; the troubleshooting section of our setup guide covers the fixes.

What if Xfinity will not activate my modem?

Contact us within 30 days of delivery through your account's Orders page or at support@modemguides.com and we will process the return. See our refund policy for the details.