US Cable Support > Comcast HSI > Getting Comcast, need some help

reply to S60

Re: Getting Comcast, need some help

Here's the speeds I'm getting in a middle of a 5GB download:


This is what my modem stats say:


I also did a few tests, I hope these a okay results:
»/linequality/nil/2557678
»/linequality/nil/2557673
»/linequality/nil/2557644

Those results are exactly where they should be; Comcast tiers are actually overprovisioned by 10% on download and upload speeds to make sure people test at the speed tier they're buying. So theoretically you can do 17600 kbps all day long on your connection (after PowerBoost wears off).

Modem levels look to be right where you want them to be, and channel bonding appears to be working despite not having a DOCSIS 3.0 tier (yay for DOCSIS 3 modems). That said, doesn't look like you're getting any speed boost from dual channels, though having two means you'll be more likely to get 100% of your rated speed 100% of the time.

What's interesting is that your upstream modulation is DOCSIS 1.1 rather than DOCSIS 2.0. I've never seen a DOCSIS 1.1 upstream channel along with bonded download channels, but that's what you're getting. Maybe try rebooting your modem to see if it'll grab a higher-modulation upstream channel. If you're actually in a DOCSIS 3.0 area you should be getting a DOCSIS 2.0 channel and 5+ Mbps of upload bandwidth (here the number is around 8-11 Mbps on my non-D3 modem).

It isnt really DOCSIS 1.1 modulation, Comcast switches between 16, 32 and 64QAM based on congestion and signal noise. I have the 22/5 service and am on 16QAM Modulation, and get 8-9mbps up (Powerboost). Comcast is currently rolling out 64QAM in all markets, and then Upstream channel bonding.