Dead modem

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Well-known member
Nov 1, 2020
Just an FYI from a Spectrum cable customer.

Recently, my cable modem died. I had a spare sitting around and was able to swap in the backup with only a quick call to Spectrum to give them the MAC address. Then, I went shopping for another spare modem. For speeds under 500 Mbps, there is now one and only one modem on the Spectrum list of allowed devices.

Technically, the list includes two modems, but one is so old that new units are no longer being sold. The only choice is a Netgear CM1000 whose regular price is $230. There are other allowed modems but they are all combination modem/routers.

Having a modem fail enforces the strategy of having a separate modem and router; replacing a router is a much bigger deal.
Wonder what prevents Spectrum from managing any DOCSIS compatible modem that you might attach to their network. I'd be keen to try using an Arris just to see if it works. :)

Agree on separation of duties 100%. Purchase of a cable modem can also offset the monthly service rental charge after a year or two.
If you do get the combo router/modem, it would help with the separation of networks. Use the Router on the combo device for your phones. Use the Router behind that for your PCs, set up an isolated network on the second router for IOT.

It solves some problems...
There are 34 devices listed in the “Approved for Spectrum Internet tiers up to 1G” category, which will obviously work on a connection under 500 Mbps as well, and I know at least 10 of them are just modems. Seems like most DOCSIS 3.1 modems are acceptable:

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