cward2
join:2008-11-08
Houston, TX
| [Speed] Houston Slow Speeds
So 4 tech visits down and still no resolution since the issue (I believe) isn't in my house! 3 times field maintenance guys were supposed to follow up but there's no way to tell (except the problem is still there).
Simply the problem is that with any of my 3 personal computers or work laptop hooked up directly to the Adbit cable modem, my download speeds are laughably a notch above dial up. All the time. No networking in place so we can diagnose when Comcast pings me. Started in July. Continued through August. When the hurricane tore out the cable lines to our neighborhood, I thought it would get fixed as part of the repair. Took a month to have repaired but no difference and another tech visit, escalation to field maintenance after ... same result. No change.
A little research leads me to this forum. Read a bunch of posts and it seems time to post my numbers to see if there is anything I can do so here goes and thanks for any help people can offer...
Modem info Ambit
Boot Code Version: 3.13.2
Software Version: 2.57.2033
Hardware Version: 1.12
Web Based Configuration Pages Version: 1.0.2
Downstream Data
Downstream Lock : Locked
Downstream Frequency : 591000000 Hz
Downstream Modulation: QAM256
Downstream Interleave Depth: 32
Downstream Receive Power Level: -1.2 dBmV
Downstream SNR: 23.2 dB
Interesting log events on Modem:
1453 times since I cleared log on Saturday and is listed as Critical(3) "Started Unicast Maintenance Ranging - no response received T3 time-out"
66 times since clearing log and is also listed as Critical(3) "SYNC Timing Synchronization failure - Failed to receive MAC SYNC frame within time-out period"
Line Quality test is at »/linequality/nil/2451043
and Speed Test is at
No security software. No firewall. Fully updated Windows XP. Been trying to run a tweak test but keeps timing out (not hanging). Installed Google chrome this weekend just to process pages a little faster (and the prefetch seems to help the user feel a little).
Any thoughts? Thanks, Chuck |
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AVonGauss
Premium,MVM
join:2007-11-01
Boynton Beach, FL | Your SNR for whatever reason is too low. Are the techs that have visited saying they don't see a problem or are they saying that they need to escalate the issue to another department (line techs) and you're having trouble following up with them? |
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cward2
join:2008-11-08
Houston, TX
| Interestingly they are telling me "no problem" and then turning the case over to line techs. I never have heard from a line tech subsequently (or been able to follow up with one because no way to contact). I dare not ask why they refer up if there's no problem but I have made sure that they agree there is no problem after where the line comes to my house. Thanks |
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AVonGauss
Premium,MVM
join:2007-11-01
Boynton Beach, FL
1 edit | I would send an e-mail to We_Can_Help@cable.comcast.com and explain the situation to them as you did in the first post of this topic and see if they can follow up to see if line maintenance has looked at the issue and if they haven't, is there an ETA? In the e-mail to them, I would also include either the account number and/or the phone number attached to the account so they can look up the history. |
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cward2
join:2008-11-08
Houston, TX | thanks will try that as well. |
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cward2
join:2008-11-08
Houston, TX
| Solved solved solved! Many thanks to AVonGauss' suggestion to send an email toe We_Can_Help@cable.comcast.com since that is what finally prompted a diagnostic technician call. He confirmed the SNR problem, checked a few things to confirm I wasn't the problem and then pronounced it a bad modem. He got a little frustrated that his predecessors never even tried the modem (or check the SNR for that matter). Nice guy doing a good job with pride. Thanks! |
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AVonGauss
Premium,MVM
join:2007-11-01
Boynton Beach, FL | Glad you got it working, although, a revised picture would say a thousand words...  |
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cward2
join:2008-11-08
Houston, TX
| 
Modem downstream
Downstream Modulation : QAM256
Downstream Symbol Rate : 5360537
Downstream Interleave Depth : 32
Downstream Receive Power Level : 0.2 dBmV
Downstream SNR : 38.8 dB
Modem Upstream
Upstream Modulation : QAM16
Upstream Symbol Rate : 2560 Ksym/sec
Upstream transmit Power Level : 47.0 dBmV |
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AVonGauss
Premium,MVM
join:2007-11-01
Boynton Beach, FL | I would give speedtest.net or speakeasy.net a try - I'm willing to bet the downstream is doing a bit better as well. |
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cward2
join:2008-11-08
Houston, TX | speedeasy test:
Download Speed: 17272 kbps (2159 KB/sec transfer rate)
Upload Speed: 2390 kbps (298.8 KB/sec transfer rate)
speedtest:
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