{"product_id":"arris-tg852g","title":"Arris TG852G DOCSIS 3.0 WiFi Phone Cable Modem","description":"\u003cdiv class=\"mg-product\"\u003e\n\n\u003ch3\u003eArris TG852G Overview\u003c\/h3\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003cp\u003eAn 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.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eAll-in-one gateway: DOCSIS 3.0 cable modem, wireless router, and two-line phone adapter in one device\u003c\/li\u003e\n\u003cli\u003e8x4 channel bonding with download speeds up to 343 Mbps\u003c\/li\u003e\n\u003cli\u003eTwo primary VoIP phone lines (embedded eMTA) through two RJ11 ports\u003c\/li\u003e\n\u003cli\u003eBattery backup slot that keeps phone service running for roughly 8 or 12 hours during an outage, depending on the pack installed\u003c\/li\u003e\n\u003cli\u003eFour Gigabit Ethernet LAN ports for computers, printers, extenders, and other wired devices\u003c\/li\u003e\n\u003cli\u003eBuilt-in 802.11n wireless access point on the 2.4GHz band\u003c\/li\u003e\n\u003cli\u003eMulti-processor design that preserves voice quality under heavy internet use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eBattery Backup for Phone Service\u003c\/h4\u003e\n\u003cp\u003eWith 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.\u003c\/p\u003e\n\n\u003ch4\u003eBuilt-In Router and Easy Management\u003c\/h4\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable class=\"mg-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDOCSIS Standard\u003c\/th\u003e\n\u003ctd data-label=\"DOCSIS Standard\"\u003eDOCSIS 3.0, 8x4 channel bonding\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMax Speeds\u003c\/th\u003e\n\u003ctd data-label=\"Max Speeds\"\u003eUp to 343 Mbps download, 131 Mbps upload\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePhone Lines\u003c\/th\u003e\n\u003ctd data-label=\"Phone Lines\"\u003e2 primary VoIP lines (embedded eMTA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTelephone Ports\u003c\/th\u003e\n\u003ctd data-label=\"Telephone Ports\"\u003e2 x RJ11\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eWiFi\u003c\/th\u003e\n\u003ctd data-label=\"WiFi\"\u003e802.11b\/g\/n, 2.4GHz single band\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eEthernet Ports\u003c\/th\u003e\n\u003ctd data-label=\"Ethernet Ports\"\u003e4 x Gigabit LAN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBattery Backup\u003c\/th\u003e\n\u003ctd data-label=\"Battery Backup\"\u003eInternal slot, standard (about 8 hr) or extended (about 12 hr) pack options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBest For\u003c\/th\u003e\n\u003ctd data-label=\"Best For\"\u003eLegacy Time Warner Cable and Spectrum accounts with phone service\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cdiv class=\"mg-included\"\u003e\n\u003cul\u003e\n\u003cli\u003eArris TG852G Cable Modem\u003c\/li\u003e\n\u003cli\u003eEthernet Cable\u003c\/li\u003e\n\u003cli\u003ePower Supply\u003c\/li\u003e\n\u003cli\u003eOnline Installation Manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eWill this work with my internet company?\u003c\/h3\u003e\n\u003cp\u003eThe Arris TG852G is primarily used with \u003ca href=\"https:\/\/www.modemguides.com\/collections\/charter-spectrum\"\u003eTime Warner Cable, Charter, and Spectrum\u003c\/a\u003e 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.\u003c\/p\u003e\n\u003cp\u003eBecause 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 \u003ca href=\"https:\/\/www.modemguides.com\/blogs\/modemguides-blog\/spectrum-approved-modem-list-2026\"\u003eSpectrum approved modem list for 2026\u003c\/a\u003e for up-to-date options.\u003c\/p\u003e\n\n\u003ch3\u003eSkip the Monthly Rental Fee\u003c\/h3\u003e\n\u003cp\u003eBecause 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.\u003c\/p\u003e\n\n\u003ch3\u003eSetup and Activation\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eConnect the coaxial cable from your wall outlet to the Cable port on the gateway.\u003c\/li\u003e\n\u003cli\u003ePlug in the power supply and wait a few minutes for the status lights to stabilize.\u003c\/li\u003e\n\u003cli\u003eConnect your telephone to the Tel 1 port (use Tel 2 for a second line).\u003c\/li\u003e\n\u003cli\u003eConnect devices over WiFi using the network details on the label, or by Ethernet to any LAN port.\u003c\/li\u003e\n\u003cli\u003eCall your provider to activate the gateway. Have the MAC address and serial number from the label ready.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cdiv class=\"mg-faq\"\u003e\n\u003ch4\u003eIs the Arris TG852G compatible with Spectrum?\u003c\/h4\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\n\u003ch4\u003eDoes the TG852G work with Comcast Xfinity?\u003c\/h4\u003e\n\u003cp\u003eNo. 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.\u003c\/p\u003e\n\n\u003ch4\u003eWhat internet speeds does the TG852G support?\u003c\/h4\u003e\n\u003cp\u003eWith 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.\u003c\/p\u003e\n\n\u003ch4\u003eDo I need a separate router with the TG852G?\u003c\/h4\u003e\n\u003cp\u003eNo. 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.\u003c\/p\u003e\n\n\u003ch4\u003eDoes the TG852G come with a backup battery?\u003c\/h4\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\n\u003ch4\u003eIs a DOCSIS 3.0 gateway still worth using in 2026?\u003c\/h4\u003e\n\u003cp\u003eOnly 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 \u003ca href=\"https:\/\/www.modemguides.com\/collections\/charter-spectrum\"\u003eSpectrum compatible modems\u003c\/a\u003e for current options.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003cstyle\u003e\n.mg-product { line-height: 1.6; color: inherit; }\n.mg-product h3 { margin: 28px 0 12px; color: inherit; }\n.mg-product h4 { margin: 22px 0 10px; color: inherit; }\n.mg-product p, .mg-product li { color: inherit; }\n.mg-product ul, .mg-product ol { margin: 0 0 16px; padding-left: 22px; }\n.mg-spec-table { width: 100%; border-collapse: collapse; margin: 16px 0 24px; border: 1px solid rgba(128,128,128,0.25); border-radius: 8px; overflow: hidden; }\n.mg-spec-table th, .mg-spec-table td { padding: 10px 14px; border-bottom: 1px solid rgba(128,128,128,0.2); text-align: left; vertical-align: top; color: inherit; }\n.mg-spec-table th { width: 42%; background: rgba(128,128,128,0.08); font-weight: 600; }\n.mg-spec-table tr:last-child th, .mg-spec-table tr:last-child td { border-bottom: none; }\n.mg-included { background: rgba(255,171,0,0.07); border: 1px solid rgba(128,128,128,0.25); border-radius: 8px; padding: 16px 20px; margin: 16px 0 24px; }\n.mg-included ul { margin: 0; padding-left: 20px; }\n.mg-faq h4 { margin: 20px 0 6px; }\n@media (max-width: 768px) {\n  .mg-spec-table, .mg-spec-table tbody, .mg-spec-table tr, .mg-spec-table td { display: block; width: 100%; }\n  .mg-spec-table th { display: none; }\n  .mg-spec-table tr { border-bottom: 1px solid rgba(128,128,128,0.2); padding: 10px 0; }\n  .mg-spec-table tr:last-child { border-bottom: none; }\n  .mg-spec-table td { border: none; padding: 2px 14px 8px; }\n  .mg-spec-table td::before { content: attr(data-label); display: block; font-weight: 600; opacity: 0.7; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.3px; padding-top: 8px; }\n}\n\u003c\/style\u003e","brand":"Arris","offers":[{"title":"Default Title","offer_id":40922021003350,"sku":"DMD039B-FBA","price":84.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0582\/9463\/2534\/files\/Arris-TG852G_f52cd344-5cf3-47ef-aab0-31374406cee4.jpg?v=1712173088","url":"https:\/\/www.modemguides.com\/products\/arris-tg852g","provider":"ModemGuides","version":"1.0","type":"link"}