"Roy" <> wrote in message
news:...
> I've had broadband with the same cable company for over a year now.
> Loved it until recently. Could listen to Internet radio and surf the
> Web at the same time, no problem. I've got Vista Home Premium, an HP
> a6720f computer, a Motorola SB5120 cable modem, no router.
>
> Recently, my ISP installed a new modem, same model, because my old
> one was dropping me every ten minutes. The new modem seems to
> work--all the lights are on. But nobody's home! Tech support checked
> everything. The Network is fine, the ISP is okay, the modem is okay.
> They think it's me.
>
> I can't download my email in Windows Mail or Live Mail. They will
> retrieve a few messages then time out. My mail server has Web-based
> mail, so I use that just to delete all the messages so my server won't
> fill up. I found out what the problem was with the time-outs: If a
> message has an attachment (like a jpeg) and I try to download it from
> the Web mail (I think it's Squirrel Mail), the download gets slower
> and slower and slower. I've seen numbers as small as 85 Bps. Not 85
> kilobytes per second, but 85 bytes! No wonder the server times out,
> it's dropping me!
>
> Most Web pages load slow as molasses now. If there's a Flash
> animation, forget it. Forget Youtube. Forget Itunes. What's the point
> of having a computer?
>
> Small files seem to download okay (if they are really small, but big
> files don't.
>
> Look at this:
>
> « SpeedGuide.net TCP Analyzer Results »
> Tested on: 11.27.2009 20:35
> IP address: 12.175.xx.xxx
> Client OS: Windows Vista
>
> TCP options string: 020405b401010402
> MSS: 1460
> MTU: 1500
> TCP Window: 17520 (multiple of MSS)
> RWIN Scaling: 0 bits
> Unscaled RWIN : 17520
> Recommended RWINs: 64240, 128480, 256960, 513920, 1027840
> BDP limit (200ms): 701kbps (88KBytes/s)
> BDP limit (500ms): 280kbps (35KBytes/s)
> MTU Discovery: ON
> TTL: 50
> Timestamps: OFF
> SACKs: ON
> IP ToS: 00000000 (0)
>
> I disabled auto-tuning with netsh. I thought that was supposed to fix
> the RWIN value at 65535, but it's still 17520, the lowest value Vista
> uses. Could that be the trouble? What do I do about it?
>
> Check out this tracert output:
>
>
>
> Tracing route to google.com [74.125.53.100]
>
> over a maximum of 30 hops:
>
>
>
> 1 * * * Request timed out.
>
> 2 9 ms 9 ms 10 ms 192.168.253.1
>
> 3 11 ms 11 ms 25 ms 12.94.219.49
>
> 4 79 ms 80 ms 82 ms cr2.dlstx.ip.att.net [12.123.18.142]
>
> 5 82 ms 79 ms 79 ms cr2.dvmco.ip.att.net [12.122.31.90]
>
> 6 78 ms 78 ms 81 ms cr2.st6wa.ip.att.net [12.122.1.78]
>
> 7 80 ms 79 ms 78 ms 12.122.146.157
>
> 8 79 ms 79 ms 80 ms 12.89.209.14
>
> 9 83 ms 111 ms 79 ms 209.85.249.34
>
> 10 82 ms 86 ms 83 ms 209.85.250.126
>
> 11 86 ms 85 ms 87 ms 209.85.250.144
>
> 12 87 ms 86 ms 85 ms 64.233.174.123
>
> 13 89 ms 99 ms 88 ms 72.14.232.70
>
> 14 87 ms 85 ms 102 ms pw-in-f100.1e100.net [74.125.53.100]
>
>
>
> Trace complete.
>
> Good or bad? I am as a virgin in these matters. (But loyalty's slut,
> loyalty's most eager slut!)
>
>
> From netsh:
> Querying active state...
>
> TCP Global Parameters
> ----------------------------------------------
> Receive-Side Scaling State : enabled
> Chimney Offload State : enabled
> Receive Window Auto-Tuning Level : disabled
> Add-On Congestion Control Provider : ctcp
> ECN Capability : disabled
> RFC 1323 Timestamps : disabled
>
> Why is my RWIN still 17520? I have been tearing out my hair about this
> for days, and I was bald enough to begin with.
>
> Does anyone have any ideas. Even if all you can suggest is another
> newsgroup, I'll take it. I need my YouTube!
Check the modem's signal stats
Open a browser and type
http://192.168.100.1 then click on the Signal tab.
Check these 3 stats:
Downstream Power Level: should be between -10 and +10 dBmV
Downstream Signal To Noise Ratio: should be higher than 33dB
Upstream Power Level: should be between +30 and +55dBmV
If any of those are off contact your isp.
BTW, what isp are you using?
--
-smithdoerr