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tmac

@comcast.net
reply to ExoticFish

Re: [Speed] Comcast performance speeds fluctuate

MORE INFO:

I'm in Provo, Utah. The speed fluctuations happen all day. I have a Motorola SB5101 modem with firmware version SB5101-2.7.8.0-GA-00-NOSH. I thought the issue may be my Cisco router at first, but I am plugged directly into my modem and still experience the speed problems. I'm running AVG 2012 (newest version). I have tested and found the problem on my Windows 7 PC and my Android phone, using both Firefox and Chrome browsers.

I'm subscribed to the Comcast Performance 20mbps down/4mbps up connection.


JigglyWiggly

join:2009-07-12
Pleasanton, CA
post your modem signals too
and I am pretty sure performance is 15/2
unless your area is different


tmac

@comcast.net
Modem signals:

Frequency 555000000 Hz
Signal To Noise Ratio 38.9 dB
Power Level 8.8 dBmV

Channel ID 11
Frequency 28000000 Hz
Power 47.2 dBmV

I got an upgrade to 20mbps, and I do reach those speeds every once in a while, it's just very inconsistent.

ExoticFish

join:2008-08-31
Stuarts Draft, VA
20 probably includes PowerBoost. You need to provide all the info requested above so we can help you. Speed tests and all.
--
»www.VAJeeps.com


tmac

@uvsc.edu
Here are some speed tests I ran yesterday on speedtest.net:

I'll just list the download speed, because the upload speed always stayed about the same (around 4mb/s) and ping was always around 45 ms

1. 15.32mb/s
2. 10.11 mb/s
3. 15.24 mb/s
4. 4.33 mb/s
5. 3.81 mb/s
6. 18.73 mb/s
7. 22.42 mb/s
8. 7.91 mb/s

This was all within an hour time period, and the speed fluctuates like this pretty much all throughout the day. I realize that it would be unreasonable to expect a constant 20mb/s as Comcast advertises, but I would think I should be getting pretty constant averages over 10mb/s. I contacted Comcast and the service rep just told me to reset my modem, which of course did not fix the problem. Any help here would be great.

ExoticFish

join:2008-08-31
Stuarts Draft, VA
Download/Run this and post the results: »www.cc.gatech.edu/~partha/diffpr···obe.html
--
»www.VAJeeps.com


tmac

@comcast.net
DiffProbe release. January 2012. Build 1008.
Shaper Detection Module.

Connected to server 38.107.216.19.

Estimating capacity:
Upstream: 1364 Kbps.
Downstream: 5464 Kbps.

The measurement will take upto 2.5 minutes. Please wait.

Checking for traffic shapers:

Upstream: No shaper detected.
Median received rate: 1344 Kbps.

Downstream: No shaper detected.
Median received rate: 5338 Kbps.

For more information, visit: »www.cc.gatech.edu/~partha/diffprobe

ExoticFish

join:2008-08-31
Stuarts Draft, VA
Time to call Comcast.


tmac

@uvsc.edu
I was afraid of that. Any idea of what's causing the problem?

ExoticFish

join:2008-08-31
Stuarts Draft, VA
Faulty modem, some type of noise issue possibly... Speaking of modems, which one do you have ?
--
»www.VAJeeps.com


tmac

@myvzw.com
I've got the SB5101. It's on rental from Comcast.

Gravy_Dave

join:2006-02-21
Sacramento, CA
Just go trade it in for a newer model modem. I did and all is good.

ExoticFish

join:2008-08-31
Stuarts Draft, VA
reply to tmac
Yeah, you need a newer modem.
--
»www.VAJeeps.com


tmac

@comcast.net
I'm thinking about just returning the rental modem and buying my own. Any recommendations for a good one for the service I have (20mbps down/4mbps up)?

Also, has anyone had any experience returning a Comcast rental modem? I'm hoping they will just take it and take off the $7/month I'm paying to rent it, but I'm worried that it may have been part of my contract, and I may be forced to rent it until my contract is up (in a year).