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austin

New Member

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4 Messages

Monday, June 9th, 2014 9:00 AM

Slower Download Speeds After Install

I just had comcast business internet installed this morning, and already it has slowed down.  I should have 50mbps down and 10 up but speedtest.net maxes out around 23mbps on every host I try.  Comcast's own speedtest tool (http://business.comcast.com/tools/internet-speed-test) showed the same thing.  What's going on?  Why can I not get the full 50mbps down that I am paying for?

Question

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Updated 

10 years ago

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5

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Accepted Solution

Samuel

Trusted Forum Contributor

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113 Messages

10 years ago

Note the temperature of your modem. You're at Docsis 3 and maintaining a 256 qam but other factors may exist.

 

Hook a cable directly to the modem to a known clean pc with no other cables connected (network cables)

 

The network cable that you use for your retest look down the side of it and tell me what it says.

 

Patch txxx etc

 

 

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Accepted Solution

austin

New Member

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4 Messages

10 years ago

Not sure what you mean about the revision correctness.  If you tell me where I can find it I'll check.  I copied these tables from the modem WAN info:

Downstream
Channel Bonding Value
Index
1
2
3
4
5
6
7
8
Lock Status
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Frequency
645 MHz
639 MHz
651 MHz
657 MHz
663 MHz
669 MHz
675 MHz
681 MHz
SNR
40.366 dB
40.946 dB
40.946 dB
40.366 dB
40.946 dB
40.946 dB
40.946 dB
40.366 dB
Power
5.700 dBmV
5.900 dBmV
5.800 dBmV
6.200 dBmV
6.300 dBmV
6.600 dBmV
6.800 dBmV
6.400 dBmV
Modulation
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
Upstream
Channel Bonding Value
Index
1
2
3
Lock Status
Locked
Locked
Locked
Frequency
22 MHz
36 MHz
29 MHz
Symbol Rate
5120 KSym/sec
5120 KSym/sec
5120 KSym/sec
Power Level
38.500 dBmV
38.500 dBmV
40.000 dBmV
Modulation
64 QAM
64 QAM
64 QAM
Channel ID
4
6
5

 

Hopefully that's what you were looking for.  Let me know if not

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Accepted Solution

Samuel

Trusted Forum Contributor

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113 Messages

10 years ago

Have ya checked your cable revisions for correctness?

 

Post your cable levels from your modem.

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austin

New Member

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4 Messages

10 years ago

It's now down under 10mbps.  Not sure if I might have faulty equipment?  At this rate I'll be down to dial-up speed by the end of the day.

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austin

New Member

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4 Messages

10 years ago

It seems to be performing better today, although there were a just a few minutes when it dropped to under 1mbps, which is annoying.  I am used to connections that maintain a constant speed 24/7, and I guess comcast is just not that way.  I'll come back if I continue to have problems.

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