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less than 1mb of upload speed

810TJCraig
Regular Visitor

less than 1mb of upload speed

I don't know what to do. Every evening, my upload speeds drop to less than 1mb. Playing on Xbox Live becomes impossible.

 

I have the 300mb service. I get 350 down.

 

I recently had a complete outage. The coaxial cable was broken, had water in it. It was replaced from the pole to the drop.

 

My speed is decent during the day, around 1900 EST, my speed drops so bad that the Xfinity speed test just says error.

 

This is extremely frustrating.

EG
Expert

Re: less than 1mb of upload speed

What do the modem's signal stats look like ? Try getting them here http://192.168.100.1 or here http://10.0.0.1

Please post the *Downstream Power Level*, the *Upstream Power Level*, and the *SNR* (Signal to Noise Ratio) numbers.

What is the exact make and model number of the modem ?

Is this a WiFi connection ?



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810TJCraig
Regular Visitor

Re: less than 1mb of upload speed


@EG wrote:

What do the modem's signal stats look like ? Try getting them here http://192.168.100.1 or here http://10.0.0.1

Please post the *Downstream Power Level*, the *Upstream Power Level*, and the *SNR* (Signal to Noise Ratio) numbers.

What is the exact make and model number of the modem ?

Is this a WiFi connection ?


I can't find the downstream power level.  What tab is that under?

810TJCraig
Regular Visitor

Re: less than 1mb of upload speed

IndexLock StatusFrequencySNRPower LevelModulation
Downstream
Channel Bonding Value
5
2
3
4
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
37
 
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
507 MHz
483 MHz
489 MHz
495 MHz
513 MHz
519 MHz
525 MHz
531 MHz
537 MHz
543 MHz
549 MHz
555 MHz
561 MHz
567 MHz
573 MHz
579 MHz
585 MHz
591 MHz
597 MHz
603 MHz
609 MHz
615 MHz
621 MHz
627 MHz
633 MHz
639 MHz
645 MHz
651 MHz
657 MHz
663 MHz
669 MHz
690 MHz
611600000
43.0 dB
43.1 dB
42.9 dB
43.0 dB
43.3 dB
43.2 dB
43.2 dB
43.0 dB
42.9 dB
42.6 dB
42.7 dB
42.7 dB
42.5 dB
42.6 dB
42.5 dB
42.6 dB
42.5 dB
42.5 dB
42.2 dB
42.2 dB
42.1 dB
42.1 dB
41.9 dB
41.8 dB
41.5 dB
41.6 dB
41.6 dB
41.2 dB
40.8 dB
40.7 dB
40.8 dB
41.3 dB
NA
-2.3 dBmV
-2.4 dBmV
-2.5 dBmV
-2.4 dBmV
-2.1 dBmV
-2.1 dBmV
-2.2 dBmV
-2.4 dBmV
-2.6 dBmV
-2.9 dBmV
-2.8 dBmV
-2.6 dBmV
-2.6 dBmV
-2.6 dBmV
-2.5 dBmV
-2.5 dBmV
-2.6 dBmV
-2.6 dBmV
-2.7 dBmV
-2.7 dBmV
-2.8 dBmV
-2.8 dBmV
-2.9 dBmV
-3.2 dBmV
-3.4 dBmV
-3.5 dBmV
-3.9 dBmV
-4.5 dBmV
-5.5 dBmV
-6.0 dBmV
-5.6 dBmV
-3.9 dBmV
NA
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
OFDM
OFDM
IndexLock StatusFrequencySymbol RatePower LevelModulationChannel Type
Upstream
Channel Bonding Value
1
2
3
4
Locked
Locked
Locked
Locked
35 MHz
29 MHz
22 MHz
16 MHz
5120
5120
5120
5120
50.8 dBmV
50.8 dBmV
50.0 dBmV
50.0 dBmV
QAM
QAM
QAM
QAM
ATDMA
ATDMA
ATDMA
ATDMA
EG
Expert

Re: less than 1mb of upload speed

This may or may not be the root cause of the problem but it should be addressed regardless.

The upstream power is on the high side and it may be intermittently fluctuating even higher to out of spec levels. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels. <br><br>In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart etc. Splitters should be swapped with known to be good / new ones to test<br><br>If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two way splitter connected directly off of the drop from the street/pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed, and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.


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I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.
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810TJCraig
Regular Visitor

Re: less than 1mb of upload speed

I can't find the setting to check this again, can you explain how I can check the power levels?

 

EG
Expert

Re: less than 1mb of upload speed

You already did. And I already gave you some stuff that you can try.



I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark the post as Best Answer!