Comcast BLAST not a blast.

[Rosebud22]

So on a Promo I signed up for Comcast Blast that is suppose to go as high
a 105MBS. I do a speed test mid day, when I most use it and only get
30MBS. I call them to see why and the answer is must be my fault, my modem is too slow. I bought the modem they recommended. When I test at say 3AM
the speed is 85MBS so it is not the modem. What are other people's experience with this service? I going back to standard service. Why pay for something I am not getting?

[Peter.Steele]

Cable is heavily dependent on how many customers you have in the area that are also using that service at the same time. At 3AM, you're not sharing bandwidth with too many people, so you get more of it. At noon, there's a lot more people awake and doing stuff.

That said, I routinely get 100-130 with Comcast.

[Danimal86]

make sure your modem is docsis 3.0. That made a big difference for me.

Also look at your bill, usually you pay for "at least XXX mbps". If your getting less than your paying for then call them out for service

[wpage]

You problem could be on the recieving end as well as contention.

[d4v0s]

So on a Promo I signed up for Comcast Blast that is suppose to go as high
a 105MBS. I do a speed test mid day, when I most use it and only get
30MBS. I call them to see why and the answer is must be my fault, my modem is too slow. I bought the modem they recommended. When I test at say 3AM
the speed is 85MBS so it is not the modem. What are other people's experience with this service? I going back to standard service. Why pay for something I am not getting?

Post your modem model number, at 3am you should be getting 105 or more.

Also, what router are you running, and how far are you from it on wireless.

[spyde12]

I remember 10+ years ago when Comcast expanded in my neighborhood, speed was atrocious. Consistently getting 256k tops. Since the expansion was in the early stages, signal between repeaters were far and few between. Once they added more repeaters or signal boosters, the speed, performance and reliability got better.

OP, do you know if your neighborhood is getting any upgrades scheduled by Comcast in the future? I would recommend that you dispatch a service technician to your place. They'll give you the accurate information than some support agent behind the phone (no offense).

Sent from my SM-N900T using Tapatalk

[riggidy]

Are you wifi or hardline? Wifi will never get you the same speed as hardline unless. Offair noise (cordless phones, other routers) will hurt the speeds. Pretty much anything that effects 2.4ghz will slow your wifi down. Never do a speedtest through wifi

What site are you using? Use speedtest.comcast.net. Its on the comcast network so you get a more reliable test.

What else is on your home network? Do you have kids running torrents? Grandma watching netflix? Google docs syncing in the background? All of this stuff uses bandwidth.

Last, do a ping test. What are your ping times? Pinging google.com is a good test if you are in the bay area. Google is outside of the comcast network but still on the bay fiber ring.

I know quite bit about the Comcast infrastructure and would be glad to help isolate your problem. Docsis 3 is important because it will lock onto all of the available downstream carriers. I.e. In my area there are 16 carriers each capable of handling roughly 20 megs of data.
3am, 2pm, 5pm.....it shouldn't matter since Comcast manages and caps speeds at the modem. This is to ensure that high usage times don't bog down.

[Rosebud22]

Thanks for all the input.
Here is some more info. The modem is a Netgear CMT31T and is docsis 3.0 compliant. I am hard wired so Wifi in not the issue.
I think the issue is Comcast blowing smoke.

[Gringo Bandito]

Perhaps it is a router problem? I am a blast customer with a 80+MB connection.

[bacon_lover]

Just ran a test and I'm getting a 12ms ping and solid 105 Mbps connection. Do you have any splitters between the MPOE and your cable modem? Are you running any sort of router in between your computer and the cable modem?

Forgot to ask: are you running any sort of VPN or proxy service during the day, say for work, that you don't use at 3am?

[DaveInOroValley]

Others have already mentioned testing speed when wireless but at least that is an indication of how good your wireless router performs. I have WaveBroadband 100 and over a 5GHZ Airport Extreme I get 85 pretty regularly, hard wired usually 95-100.

Most service providers will only guarantee 85% of your total anyway.

[riggidy]

The problem is usually not the router's fault, its usually competing with your neighbor's network for a clean channel on the 2.4ghz carrier. 5ghz will only be better until dual band routers become more popular. Apps such as wifi analyzer are priceless when setting up your router.

[high_revs]

do a test when connected to the modem directly. it's unusual it'll degrade that much but that will be first test comcast will ask you - hardwired and direct to modem (not router). unsure if you have splitters but i say bypass that too for simple test.

[BigPimping]

All you had to say was "Comcast." They really are the pit of hell.

[Peter.Steele]

Well, I moved my router and modem around to a different cable jack and now I'm running hardwired to my workstation at home. I'm getting a little better now than the 100-130 I mentioned earlier ...