Regular Visitor
•
3 Messages
NetGear CM1000v2 FW: V7.01.01 - Regular (and I mean regular) Internet Issues
I am not sure when these issues started happen, I am sure it was not immediately when I connected the CM1000v2, possibly after a firmware update but I cannot confirm that.
What happens? My internet dies, I wake in the morning and notice a non-responsive internet experience and do a "SpeedTest" and notice an almost dial-up download speed of less than 1MBps. To remedy this I turn off my modem, unplug the cable, wait 10s, plug the cable back in and turn the modem on. This worked all the time until today (01/10/2010) when the first manual reset did not work and I had to perform another. Regardless, the modem and the router are both reset at 2am every night and this should be enough to "blow the gremlins out of the system".
I have phoned Xfinity customer service often, I have had engineers come out. They larrive when the interne tis responsive and they leave when it is still responsive. There needs to be a permanent solution; NetGear tells me this modem works on the Xfinity cable network and you guys do not tell me otherwise.
To add to this in a hope someone can shed some light on this matter, the modem logs (which are not great, in that they overwrite entries) tells me there is a lot of this
`SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing`
and a lot of this
`No Ranging Response received`.
Responses
EG
Expert
•
87.2K Messages
5 m ago
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.
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stakka
Regular Visitor
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3 Messages
5 m ago
So, this morning (01/16/2021) I tried a manual reset - FAIL. I then proceeded to perform a reset from the modem admin console - FAIL. And by 'FAIL' I mean the state of my download speed remained unchanged (<1Mbps) after the 'reset'. I then performed an Xfinity modem reset from my Xfinity account console - FAIL. I called Xfinity and they (lovely Xfinity robot lady who is quite familiar of my voice by now) performed a remote reset (same as the previous 'reset', I guess but ANYTHING to move on from dial-up) - FAIL. Then I did another manual reset (turn off modem, unplug cable, wait a holy 15s, plug cable back in and turn modem on) - SUCCESS. There is no common denominator here so I have no clue as to what is going on - CLUELESS.
I have pulled the stats from the modem when it refuses to give me a decent download speed, this table represents the "Download Bonded Channels":
Channel
Lock Status
Modulation
Channel ID
Frequency
Power
SNR / MER
Unerrored Codewords
Correctable Codewords
Uncorrectable Codewords
1
Locked
QAM256
28
603000000 Hz
4.3 dBmV
37.6 dB
1118847452
5030
0
2
Locked
QAM256
4
453000000 Hz
7.5 dBmV
39.4 dB
1117662671
19
0
3
Locked
QAM256
5
459000000 Hz
7.5 dBmV
39.6 dB
1117666526
18
0
4
Locked
QAM256
6
465000000 Hz
7.6 dBmV
39.5 dB
1117670015
20
0
5
Locked
QAM256
7
471000000 Hz
7.5 dBmV
39.5 dB
1117674006
33
0
6
Locked
QAM256
8
477000000 Hz
7.4 dBmV
39.4 dB
1117679469
35
0
7
Locked
QAM256
9
483000000 Hz
7.2 dBmV
39.2 dB
1117684961
70
0
8
Locked
QAM256
10
489000000 Hz
7.2 dBmV
39.3 dB
1117692023
59
0
9
Locked
QAM256
11
495000000 Hz
7.0 dBmV
39.3 dB
1117698005
78
0
10
Locked
QAM256
12
507000000 Hz
6.9 dBmV
39.1 dB
1117701534
127
0
11
Locked
QAM256
13
513000000 Hz
6.5 dBmV
38.9 dB
1117705656
176
0
12
Locked
QAM256
14
519000000 Hz
6.4 dBmV
38.9 dB
1117709292
225
0
13
Locked
QAM256
15
525000000 Hz
6.0 dBmV
38.8 dB
1117713491
309
0
14
Locked
QAM256
16
531000000 Hz
5.7 dBmV
38.6 dB
1117716936
450
0
15
Locked
QAM256
17
537000000 Hz
5.4 dBmV
38.3 dB
1117719951
802
0
16
Locked
QAM256
18
543000000 Hz
5.1 dBmV
38.3 dB
1117723575
963
0
17
Locked
QAM256
19
549000000 Hz
5.2 dBmV
38.3 dB
1117728590
971
0
18
Locked
QAM256
20
555000000 Hz
5.0 dBmV
38.4 dB
1117732022
1003
0
19
Locked
QAM256
21
561000000 Hz
5.0 dBmV
38.4 dB
1117735732
978
0
20
Locked
QAM256
22
567000000 Hz
4.9 dBmV
38.3 dB
1117739437
1146
0
21
Locked
QAM256
23
573000000 Hz
4.8 dBmV
38.1 dB
1117742762
1428
0
22
Locked
QAM256
24
579000000 Hz
4.5 dBmV
38.0 dB
1117746318
1639
0
23
Locked
QAM256
25
585000000 Hz
4.5 dBmV
38.1 dB
1117750031
2499
0
24
Locked
QAM256
26
591000000 Hz
4.5 dBmV
37.9 dB
1117752512
3452
0
25
Locked
QAM256
27
597000000 Hz
4.3 dBmV
37.8 dB
1117754889
4884
0
26
Locked
QAM256
29
609000000 Hz
4.1 dBmV
37.5 dB
1117756335
7267
0
27
Locked
QAM256
30
615000000 Hz
3.9 dBmV
37.3 dB
1117756496
10259
0
28
Locked
QAM256
31
621000000 Hz
3.4 dBmV
37.1 dB
1117756373
14521
0
29
Locked
QAM256
32
627000000 Hz
3.6 dBmV
37.0 dB
1117754034
20844
0
30
Locked
QAM256
33
633000000 Hz
3.5 dBmV
36.9 dB
1117754671
21135
0
31
Locked
QAM256
34
639000000 Hz
2.9 dBmV
36.7 dB
1117747845
27634
0
32
Not Locked
Unknown
0
0 Hz
0.0 dBmV
0.0 dB
0
0
0
The upload speeds seem to remain constant and acceptable (e.g. as advertized) but I will include them here for prosperity:
Channel
Lock Status
Modulation
Channel ID
Frequency
Power
1
Locked
ATDMA
29
36500000 Hz
36.0 dBmV
2
Locked
ATDMA
30
30100000 Hz
35.8 dBmV
3
Locked
ATDMA
31
23700000 Hz
34.8 dBmV
4
Locked
ATDMA
32
17300000 Hz
34.0 dBmV
5
Not Locked
Unknown
0
0 Hz
0.0 dBmV
6
Not Locked
Unknown
0
0 Hz
0.0 dBmV
7
Not Locked
Unknown
0
0 Hz
0.0 dBmV
8
Not Locked
Unknown
0
0 Hz
0.0 dBmV
If anyone can decipher these tables and give me a "eureka" moment, I will be extremely grateful!
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EG
Expert
•
87.2K Messages
5 m ago
Don't know what's going on, but FWIW, the signal status values are o/k.
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