Arris TG852G DOCSIS 3.0 WiFi Phone Cable Modem

Arris TG852G Overview

The Arris Touchstone TG852G is an all-in-one DOCSIS 3.0 residential gateway that combines a cable modem, a 4-port Gigabit router, 802.11n WiFi, and two VoIP phone lines in a single device. With 8x4 channel bonding supporting download speeds up to 343 Mbps, it can handle internet, WiFi, and home phone service for a household or small business without any extra equipment.

An internal battery backup slot keeps the phone lines active during power outages, and the Arris multi-processor design maintains call quality even when the data side of the gateway is working hard.

Key Features

• All-in-one gateway: DOCSIS 3.0 cable modem, wireless router, and two-line phone adapter in one device
• 8x4 channel bonding with download speeds up to 343 Mbps
• Two primary VoIP phone lines (embedded eMTA) through two RJ11 ports
• Battery backup slot that keeps phone service running for roughly 8 or 12 hours during an outage, depending on the pack installed
• Four Gigabit Ethernet LAN ports for computers, printers, extenders, and other wired devices
• Built-in 802.11n wireless access point on the 2.4GHz band
• Multi-processor design that preserves voice quality under heavy internet use

Battery Backup for Phone Service

With a compatible battery pack installed, the TG852G keeps its phone lines powered for about 8 hours on a standard pack or up to 12 hours on an extended pack. That means you can still reach emergency services, check on family, or keep a security or medical alert system connected through a power outage, which makes this gateway a popular choice for households that depend on a landline.

Built-In Router and Easy Management

The 4-port Gigabit router and 2.4GHz wireless access point get your wired and WiFi devices online without extra hardware. Everything is managed through the built-in admin panel: connect to the gateway's network, log in, and adjust wireless settings, parental controls, and status logs yourself, with no wiring changes or long support calls.

Specifications

What's Included

Will this work with my internet company?

The Arris TG852G is primarily used with Time Warner Cable, Charter, and Spectrum service, most often on longstanding accounts that include cable phone service. This model was approved for use with Comcast in the past, but a Comcast firmware change ended that support, so it is no longer accepted on Xfinity.

Because this is an 8x4 DOCSIS 3.0 device, it is best suited to legacy plans and lower speed tiers, and some current plan speeds are not supported. Always contact your service provider's customer service before placing your order to confirm this model will work with your account and plan. If you are on a current Spectrum plan, see our Spectrum approved modem list for 2026 for up-to-date options.

Skip the Monthly Rental Fee

Because the TG852G replaces both a rented modem and a rented WiFi router, owning it can eliminate up to $14 per month in equipment fees, as much as $168 per year. A professionally refurbished unit typically pays for itself within a few months.

Setup and Activation

1. Connect the coaxial cable from your wall outlet to the Cable port on the gateway.
2. Plug in the power supply and wait a few minutes for the status lights to stabilize.
3. Connect your telephone to the Tel 1 port (use Tel 2 for a second line).
4. Connect devices over WiFi using the network details on the label, or by Ethernet to any LAN port.
5. Call your provider to activate the gateway. Have the MAC address and serial number from the label ready.

Frequently Asked Questions