Arris Surfboard mAX (8x4) DOCSIS 3.0 Cable Modem, 343 Mbps Max Speed, Xfinity Telephone Capable for 2 Lines, Certified for Comcast Xfinity Only (TM822R)
Key features
- •Compatible with Xfinity Voice & Internet Service Download speeds up to 343 Mbps.
- •DOCSIS 3.0 Cable Modem. 2 Year Warranty
- •Eight download and four upload channels.
- •Battery back up capable (battery not included)
- •2 carrier-grade Voice over IP (VoIP) Lines
- •IPv4 & IPv6 Support
BrandARRIS
CategoryModems
SizeMax Download Speed: 343 Mbps
ColorBlack
Warranty2 year limited parts and labor
Arris Surfboard mAX (8x4) DOCSIS 3.0 Cable Modem, 343 Mbps Max Speed, Xfinity Telephone Capable for 2 Lines, Certified for Comcast Xfinity Only (TM822R)
List Price: $130.94$117.85DEALYou Save: $13.09 (10%)
Free shippingFree Returns – 30 daysFree Order CancellationSecure Payment2–3 Days DeliveryGet It June 23, 2026In Stock (5)No marketing spamNo account requiredFulfilment by FedEx / Amazon / UPS / ShipwirePayPal / Card Buyer Protection
Customer Reviews
Reviews sourced from verified Amazon purchasers4.2
out of 5
Based on 10 reviews
5★
40%
4★
30%
3★
20%
2★
0%
1★
10%
Vital setup instruction missing
Rich S.✓ Verified Purchase•January 27, 2018
WARNING - you must log into the modem through 10.0.0.1 and set up an admin account before the modem will allow internet access - either through Cat5 OR WiFi.
Neither the Xfinity nor the Arris tech support folks know this. And it isn't a step in the quick start guide.
7 days, 2 modems, 4 techs, 6 hours on the phone ... and the thing finally works.
Yeah - it works fine.
Neither the Xfinity nor the Arris tech support folks know this. And it isn't a step in the quick start guide.
7 days, 2 modems, 4 techs, 6 hours on the phone ... and the thing finally works.
Yeah - it works fine.
Easy swap out and is exactly like the comcast modem except for the color!
Topsargeron✓ Verified Purchase•January 26, 2018
A really good modem so far. It matched almost exactly the modem provided by comcast. I was able to do the swap out myself ( three wires to swap) pretty straight forward. Then contact comcast for the tech part, they carry you through step by step. A little glitch with the phone set up , but that was on comcast! Speeds are great and all features on our service are working great!
Flakey chipset goes down; bridge mode doesn’t work correctly
G.E.✓ Verified Purchase•January 25, 2018
This modem has been a terrible performer. Bridge mode doesn't work correctly, meaning you cannot reliably use another router and/or Wi-Fi station behind it (I use both a wired Ethernet router as well as an Apple AirPort Extreme). During the 6 months I've owned it with my Xfinity service, I've had toneeaet the modem at least 2 dozen times, and it has a firmware bug that makes bridge mode eventually stop working (search the Internet and you'll find many reports of this problem). It's a poor design.
This modem was recommended by comcast and prevents them from charging me for ...
Amazon Customer✓ Verified Purchase•January 24, 2018
This modem properly placed will work your phone and computer negating the need for two modems. My problem was that my cable provider located the phone modem in the garage so that I would need two modems. One for the computer and one for the land line. It will pay for itself in less than two years. This modem was recommended by comcast and prevents them from charging me for rental which by the way is increasing this year.
After trying a few things they said the modem wasn't any good and should be returned
Maria C. Repetto✓ Verified Purchase•January 23, 2018
I had some trouble at first configuring the new modem. Comcast was no help. After trying a few things they said the modem wasn't any good and should be returned. I decided to shut everything down and restart the modem and this time it worked perfectly. My only complaint is that I don't see any discernable difference in operation from my old 2.0 modem and the new 3.0.
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