Frequent Visitor
•
9 Messages
New Router Motorola MB8600 very slow
2 days ago I upgraded to a new modem - MB8600 from an old SB6121.
A week ago I upgraded from 200 Mbps to a Gigabit plan.
After activating the MB8600 online, I checked my internet speeds which now = 30-32 Mbps download and 40 Mbps upload. Previously, I was getting 130 Mbps with a slower plan and my old SB6121. The blue download light is flashing on the new modem, the upload light is solid. I've tried running speed tests directly from my modem and also through my router, there is no difference in speed.
I've called Comcast and have chatted with numerous agents, some of which say there is a signal issue on their end but the last 2 I've chatted with say there's no issue on their end. All they want to do is send a tech out to my house which doesn't seem helpful.
Any thoughts or ideas? I know others have had this issue but I'm not sure what their resolution was. Here's some info from my modem below:
Accepted Solution
EG
Expert
•
105.7K Messages
4 years ago
The upstreams are o/k but there is a serious signal / connection problem with the downstreams. There appears to be a serious case of reverse cable tilt ! Some of the carriers are not even locked and some are out of spec (including some of the SNR's.
It may be best for you to get a tech out to investigate this / balance the line.
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Snowguy2
Frequent Visitor
•
9 Messages
4 years ago
Ahhh bummer.
Well, here's maybe the pertinent parts of the bonded channel page:
Channel Lock Status Modulation Channel ID Freq. Pwr SNR corrected uncorrected
1 Locked QAM256 41 669.0 10.1 41.7 1 0
2 Not Locked Unknown 13 495.0 -37.6 0 0 0
3 Not Locked Unkown 14 507 -23.1 0 0 0
4 Locked QAM256 15 513.0 -16.1 27.1 28897827 91908
Warnings I've had today:
Warning (5) REG RSP MP Mismatch between calculated value for P1.6hi compared to CCAP Provided Value...
Warning (5) RNG-RSP CCAP COmmanded Power exceeds value corresponding to the top of the DRW....
Warning (5) Dynamic Range Window Violation...
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EG
Expert
•
105.7K Messages
4 years ago
Can't see your pics. Since you are a new poster, they need to be approved by a Forum Admin. That could take some time. In the interim, you could try hosting them at one of those free third-party pic hosting sites like Imgur or Photobucket and post the link to them here.
Or copy all of the text of the status page and paste it into the body of your next post here.
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Snowguy2
Frequent Visitor
•
9 Messages
4 years ago
Upstreams:
Channel
Lock Status
Channel Type
Channel ID
Symb. Rate (Ksym/sec)
Freq. (MHz)
Pwr (dBmV)
1
Locked
SC-QAM
1
5120
16.4
39.0
2
Locked
SC-QAM
2
5120
22.8
39.0
3
Locked
SC-QAM
3
5120
29.2
39.5
4
Locked
SC-QAM
4
5120
35.6
41.0
5
Locked
SC-QAM
5
2560
40.4
40.0
0
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Snowguy2
Frequent Visitor
•
9 Messages
4 years ago
here are the downloads, working on uploads now:
Channel
Lock Status
Modulation
Channel ID
Freq.
PWR
SNR
Corrected
Uncorrected
1
Locked
QAM256
41
669
10.1
41.7
1
0
2
Not Locked
Unknown
13
495.0
-37.6
0
0
0
3
Not Locked
Unkown
14
507
-23.1
0
0
0
4
Locked
QAM256
15
513.0
-16.1
27.1
28897827
91908
5
Locked
QAM256
16
519.0
-9.0
33.3
5
0
6
Locked
QAM256
17
525
-3.3
37.6
0
0
7
Locked
QAM256
18
531
0.9
39.8
0
0
8
Locked
QAM256
19
537
3.1
40.5
0
0
9
Locked
QAM256
20
543
4.4
40.9
0
0
10
Locked
QAM256
21
549
5.4
41.1
0
0
11
Locked
QAM256
22
555.0
5.8
41.2
0
0
12
Locked
QAM256
23
561.0
6.6
41.3
0
0
13
Locked
QAM256
24
567
6.7
41.4
0
0
14
Locked
QAM256
25
573
6.7
41.3
0
0
15
Locked
QAM256
26
579
7.5
41.6
0
0
16
Locked
QAM256
27
585
7.8
41.6
0
0
17
Locked
QAM256
28
591
8.3
41.6
0
0
18
Locked
QAM256
29
597
8.3
41.7
0
0
19
Locked
QAM256
30
603
8.6
41.7
0
0
20
Locked
QAM256
31
609
8.6
41.6
0
0
21
Locked
QAM256
32
615
8.6
41.6
0
0
22
Locked
QAM256
33
621
8.4
41.5
0
0
23
Locked
QAM256
34
627
7.3
41.3
0
0
24
Locked
QAM256
35
633
7
41.1
0
0
25
Locked
QAM256
36
639
7.2
40.9
0
0
26
Locked
QAM256
37
645
8.1
41.2
0
0
27
Locked
QAM256
38
651
8.7
41.3
0
0
28
Locked
QAM256
39
657
9.3
41.3
0
0
29
Locked
QAM256
40
663
10.2
41.5
0
0
30
Locked
QAM256
42
675
10.2
40.9
1
0
31
Locked
QAM256
43
681
10
41.5
0
0
32
Locked
QAM256
44
687
9.5
41.3
0
0
33
Locked
OFDM PLC
159
722
12.5
41.6
0
0
0
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Snowguy2
Frequent Visitor
•
9 Messages
4 years ago
Oh goodness, I just realized this copies and pastes straight out of my modem info. I just manually typed the above haha. thanks for your help. Here's an update for Downstreams if needed an hourish past the last one:
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EG
Expert
•
105.7K Messages
4 years ago
Please post the downstream channels in their entirety. Also post the upstream channel values.
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Snowguy2
Frequent Visitor
•
9 Messages
4 years ago
Thanks for the help, appreciate your time
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EG
Expert
•
105.7K Messages
4 years ago
Good luck with it ! Please post back with how things turn out.
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