Cable modem death?

Peen

Hey H/A folks, how likely is it that a cable modem will suddenly shit the bed and stop working? We've got one that's ~2 years old and our internet has been slower than mud since last night and when we called Comcast they said that they weren't reading any outages in our area but that our modem was old so we should consider replacing it. To give you an idea of what I'm talking about I'm on Comcast's mid-tier cable internet and while it'll load google's homepage it can't even load the bits to make a speedtest work. I figured I'd get more than a few years out of a modem but do you just need to periodically replace them?

zerzhul

Comcast will /always/ give the modem as the reason for a problem, usually without doing any diagnostics. It's the easiest thing for them to do, from a service standpoint. Were I you, I would look into support forums and research failures with your specific modem before going down the replacement route. A lot of times your service suddenly cutting out or getting shitty is just the precursor to a problem on their side of things. They should be able to come out and check your service without you paying a bunch of money.

Tomanta

What manufacturer/model is the modem? I've seen a few that are ten years old and still doing fine, and unless it just won't power on I would remain skeptical that the modem is the problem.

That said, if it is a DOCSIS 2.0 modem that could be why they are suggesting replacing it, everything has been moving to DOCSIS 3.0 (and will probably start moving to 3.1 in the near future).

And that said, if you are having speed problems like what you describe there's 3 likely causes:
1) You are maxing your bandwidth (upload or download).
2) There is noise somewhere causing packet loss.
3) The node you are on is saturated.

And I don't work for Comcast so I'm not sure what tools the average residential tech support agent has at their disposal, but I'd put a little cash down to say they wouldn't catch any of those.

zerzhul

Yeah, that's a good point, DOCSIS 2.0 vs. 3. I would definitely agree with potentially moving up to a 3.0 device if you don't have one. If you think it might go obsolete soon, you could temporarily rent one from comcast.

Bowen

Well that wouldn't cause a 2.0 to stop working/slow down.

It's most likely a saturated node. Especially if the problem only occurs from 4:00-11:00pm.

zerzhul

Yeah, no, not saying it would cause a problem, it's just an aside, on top of whatever the real issue is.

Bowen

It could always just have been a surge that fucked up some hardware. I argued with TWC about that for about a week.

Then I picked up a new modem and never had trouble again.

Peen

We've had some thunderstorms and it's an old modem and it's slow at any time of the day or night. I'm guess it's just borked, I ordered a new one and we'll see. Thanks everyone!

Dr. Frenchenstein

is the DOCSIS upgrade a necessary thing? i get pretty fast speeds (i don't really do much over the internets that's too taxing) with my current modem. i got a letter from Comcast saying i should upgrade, and i thought it was just some horseshit letter trying to get me to rent their equipment.

Bowen

You might get better speeds. There's a noticeable difference between 1 vs 2 vs 3, but only if you're at the mid/high tiers of service. The lowest one? Meh, DOCSIS 1 should be fine.

Dr. Frenchenstein

honestly, i have no idea which version i'm rocking... my modem is pretty damn old. might be time to upgrade.

Dr. Frenchenstein

dangit! i just bought a new router not long ago, most of the modems i see are 2 in 1 deals. ARGH

Xaquin

when that happened to me, they ended up coming out to look at a pole and in the process found a couple people stealing cable in the neighborhood which was causing everyone's internet to slow down.

at least that's what they told me.

Tomanta

bowen wrote: »

You might get better speeds. There's a noticeable difference between 1 vs 2 vs 3, but only if you're at the mid/high tiers of service. The lowes t one? Meh, DOCSIS 1 should be fine.

DOCSIS 1 may not work at all. It depends on how the node is configured. I can't recommend anyone use a DOCSIS 1 modem these days (but at lower speeds, if it does work, it will be fine).

DOCSIS 2 should work fine for any download speed < 20M, but DOCSIS 3 might work better depending on how Comcast has their stuff set up.

Bowen

Yup, I would say most nodes are configured to allow the older versions because lol @ upgrading everyone's devices. See tons of those DOCSIS 1 surfboard modems everywhere still.



Legitimately TWC is still using those right now. We got one when we moved in to our new apartment, until I asked to upgrade. The SB5120 is still pretty common too, the black version of that modem.