June 12, 2018

My home network - cable modems

From 2013 through 2018, I used a Motorola SB5120. This is a Docsis 2.0 modem I bought used for about $20. It has never given me any problems, and still works, but I am going to upgrade to a Docsis 3.0

Docsis 3.1

Apparently Docsis 3.1 is the new standard in mid 2018. The recommended unit is a Netgear CM1000 that sells for about $175. What I am reading though is that you only really need this is you are wanting to get Gigabit rates, and that even a Docsis 3.0 modem can go easily 300 Mbit, and even Gigabit.

My current contract is giving me 32 Mbit download and 7 Mbit upload (measured by the "speedtest" website). In other words, it seems pointless to spend extra for a Docsis 3.1 modem.

Motorola SB6120

I found one of these used for $20 and ordered it. This is a Docsis 3.0 unit that is well regarded and has a reputation for reliability. It is called a 4x4 modem and some providers (Comcast) are balking at having these on their network. It will go to 150 Mbit, so it should be an upgrade to what I have (since I only expect 30-50 Mbit) and I can wait and see about Docsis 3.1.
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Tom's Computer Info / [email protected]