Need help selecting Xfinity cable modem


Need help selecting Xfinity cable modem

I need help selecting an Xfinity compaible cable modem for a small home office that supports 4-5 people.  
They have 300mbps. They will add a mesh WiFi for device connectivity. There are about 5 laptops and 5 mobile phones. VOIP (not via Xfinity) and have regular office work plus large CAD/CAM files. 


The goal is to not break the bank here.


I don't know the differences in some of the technology options 

DOCSIS Channels

DOCSIS Version

Here is the Xfinity compatibility guide:


Thank you.


Message 1 of 4

Re: Need help selecting Xfinity cable modem

I'd recommend any of the docsis 3.1 devices.

Like the CM1000, CM1100, CM1200, or CM2000

They're all gigabit capable and docsis 3.1. 

We're seeing more ISP's requiring docsis 3.1 modems for lower speed tiers so the little extra is worth is for making sure you're hitting minumum requirements for your speed levels. 


Plus I've used them all but the CM1200 on xfinity and they've worked great. 

Current setup: CM2000-> RBKE963B-> Trendnet TEG-S380-> GS716T-> pi-hole
1.4gig download/50mbps upload
We’re members of the public helping out on our own time.
Message 2 of 4

Re: Need help selecting Xfinity cable modem

Do you forsee any compatibility issues with any of the usual mesh vendors - Linksys, TP-Link, Asus or Google?


If I add voice into the equation, do you have any other suggestions?

Have you used any non-netgear that you'd recommend? Motorola or Arris?


Message 3 of 4

Re: Need help selecting Xfinity cable modem

Seen no compatibily with NG, D-Link, ASUS or NetDuma routers. There isn't any compatibility issues with WiFi routers, they either work or they don't. If they don't it's usually a cable or HW issue at either the modem or wifi router. Otherwise, most wifi routers work fine. 

My Setup ISP SparkLight | Internet Cable 1000↓/50↑ CM1200 Modem |  Wifi Router Orbi RBK752 (Router Mode), Wired Backhaul and R8500 with Orbi RBKE963 (AP Mode), | Switches NG GS105/8, GS308v3, GS110MX and XS505M | 

Additional NG HW: C7800/CAX80/CM1100/CM1200/CM2000, Orbi: CBK40, CBK752, RBK50, RBK853, RBK752, RBK953, SXK30 | NightHawk: R7000, R7800, R7960P, R8000, R8500, RAXE500, RAX50, XR450, EX7500/EX7700

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Orbi WiFi 6E