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Justins123

join:2007-01-17
Denver, CO

[Speed] Comcast says my speed is fine - are they right?

I recently purchased a Motorola 6121 to replace the Comcast supplied RCA modem I'd had for 6-7 years.

I checked my speed through several speed tests and shaperprobe. It appears to be limited to 13Mbps/2Mbps. My bill says I have the performance tier. I think I should be getting at least 20Mbps/4Mbps.

I chatted online with a tech. She said my bootfile was wrong and she was going to load the correct one. Of course we got disconnected when she did. I power cycled everything and the speed remained the same. I called Comcast on the phone and the lady basically said everything looked fine. I tried resetting the modem to default settings. I also bypassed the router and the speed was the same. Is she correct? Shouldn't I be getting faster speeds?

Here is my info:

Channel ID 3 1 2 6
Frequency 615000000 Hz 603000000 Hz 609000000 Hz 633000000 Hz
Signal to Noise Ratio 38 dB 37 dB 38 dB 38 dB
Downstream Modulation QAM256 QAM256 QAM256 QAM256
Power LevelThe Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading
0 dBmV -1 dBmV -1 dBmV 0 dBmV

Upstream Bonding Channel Value
Channel ID 7 6 5
Frequency 22400000 Hz 36000000 Hz 29300000 Hz
Ranging Service ID 8428 8428 8428
Symbol Rate 2.560 Msym/sec 5.120 Msym/sec 5.120 Msym/sec
Power Level 48 dBmV 49 dBmV 49 dBmV
Upstream Modulation [3] QPSK
[2] 16QAM
[3] QPSK
[3] 64QAM
[3] QPSK
[3] 64QAM

Ranging Status Success Success Success

Signal Stats (Codewords) Bonding Channel Value
Channel ID 3 1 2 6
Total Unerrored Codewords 235227982 235227840 235228194 235227755
Total Correctable Codewords 17 1 0 0
Total Uncorrectable Codewords 625 525 577 596

DiffProbe release. January 2012. Build 1008.
Shaper Detection Module.

Connected to server 213.244.128.168.

Estimating capacity:
Upstream: 1610 Kbps.
Downstream: 129189 Kbps.

The measurement will take upto 4.5 minutes. Please wait.

Checking for traffic shapers:

Upstream: No shaper detected.
Median received rate: 1568 Kbps.

Downstream: Measurement aborted due to high packet loss rate.


pclover

join:2008-08-02
Santa Cruz, CA

"Downstream: Measurement aborted due to high packet loss rate."

I would look into your packet loss issues.

You using a router? If so try to bypass that and see if the packet loss is still there.


Justins123

join:2007-01-17
Denver, CO

Hmm, I didn't see that. Here's is what I get direct from the modem:

DiffProbe release. January 2012. Build 1008.
Shaper Detection Module.

Connected to server 83.212.4.23.

Estimating capacity:
Upstream: 2034 Kbps.
Downstream: 129727 Kbps.

The measurement will take upto 4.0 minutes. Please wait.

Checking for traffic shapers:

Upstream: No shaper detected.
Median received rate: 2016 Kbps.

Downstream: No shaper detected.
Median received rate: 12768 Kbps.



pclover

join:2008-08-02
Santa Cruz, CA

That looks right to me? Isn't performance 12 Mbps?



NetFixer
From my cold dead hands
Premium
join:2004-06-24
The Boro
Reviews:
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reply to Justins123
You appear to be getting 12/2 mbps with no PowerBoost.

That could possibly be due to an incorrect config file, or caused by local Comcast network conditions. While PowerBoost is seen most of the time, it is not guaranteed
--
History does not long entrust the care of freedom to the weak or the timid.
-- Dwight D. Eisenhower


Justins123

join:2007-01-17
Denver, CO

Ok that makes sense. Thank you for the help guys.


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