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
| DOCSIS Standard |
DOCSIS 3.0, 8x4 channel bonding |
| Max Speeds |
Up to 343 Mbps download, 131 Mbps upload |
| Phone Lines |
2 primary VoIP lines (embedded eMTA) |
| Telephone Ports |
2 x RJ11 |
| WiFi |
802.11b/g/n, 2.4GHz single band |
| Ethernet Ports |
4 x Gigabit LAN |
| Battery Backup |
Internal slot, standard (about 8 hr) or extended (about 12 hr) pack options |
| Best For |
Legacy Time Warner Cable and Spectrum accounts with phone service |
What's Included
- Arris TG852G Cable Modem
- Ethernet Cable
- Power Supply
- Online Installation Manual
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
- Connect the coaxial cable from your wall outlet to the Cable port on the gateway.
- Plug in the power supply and wait a few minutes for the status lights to stabilize.
- Connect your telephone to the Tel 1 port (use Tel 2 for a second line).
- Connect devices over WiFi using the network details on the label, or by Ethernet to any LAN port.
- Call your provider to activate the gateway. Have the MAC address and serial number from the label ready.
Frequently Asked Questions
Is the Arris TG852G compatible with Spectrum?
The TG852G has historically been used on Time Warner Cable, Charter, and Spectrum service, mainly on legacy accounts with cable phone service. Confirm with Spectrum customer service before ordering, since some current plans and speeds are not supported.
Does the TG852G work with Comcast Xfinity?
No. The TG852G was accepted on the Comcast network in the past, but a firmware change on Comcast's side ended support, and this model can no longer be activated on Xfinity.
What internet speeds does the TG852G support?
With 8x4 channel bonding, the TG852G supports download speeds up to 343 Mbps and uploads up to 131 Mbps. In practice it is the right match for lower speed legacy plans rather than modern high speed tiers.
Do I need a separate router with the TG852G?
No. The TG852G includes a 4-port Gigabit router and 2.4GHz 802.11n WiFi. If you want faster dual-band WiFi, you can connect your own router or access point to one of the LAN ports.
Does the TG852G come with a backup battery?
The TG852G has an internal battery slot that accepts a standard pack (about 8 hours of phone service) or an extended pack (about 12 hours). Units ship with the accessories listed in the What's Included section above. Without a battery installed, the gateway runs normally on AC power, but phone service will not continue during an outage.
Is a DOCSIS 3.0 gateway still worth using in 2026?
Only for a specific legacy setup, usually a grandfathered account with phone service that still supports this model. Cable providers are actively retiring older DOCSIS 3.0 equipment, and Spectrum has set a retirement timeline for DOCSIS 3.0 modems, so for any current plan a DOCSIS 3.1 modem is the safer long-term choice. Browse our Spectrum compatible modems for current options.
