Netgear CM1200 is 32×8
Downstream Light: Blinking Green (Scanning for additional downstream channels)
I don't know why the Downstream would be blinking because you have 32 locked channels.
Your Upstream, however, only has 4 Bonded Channels. I'd assume...due to gigabit...you should have 8. Your Upstream Light should be blinking.
dave9 would be the best source but I think the OFDM(A) channels are your overall circuits. These circuits are then divided into separate channels: 32 and 4. Therefore the overall circuits wouldn't be individually locked. I could be wrong and sure I am.
I guess a good question: why don't you have 8 Upstream channels?
Hi Bruce, I appreciate the response.
I am not sure why I don't have 8 upload channels locked but at this point Cox has decided that now my brand new modem is also the "Issue". The issue has been consistent through my Netgear CM1200 as well as the Netgear CM2000 modem I just purchased two weeks ago. The concerning part for me is they installed one cox modem and it actually wouldn't lock the downstream channels either. They said their modem must have an issue as well. So now we are on a forth modem(another cox modem) to see if they can pinpoint the issue. After provisioning it did lose connection but I was told it was probably upgrading the firmware so that is why it was down.
I hate to sound negative but I find it very hard to believe that 3 out of 4 different modems(including one of cox's) are the issue and not something with the signal.
I now seem to have the ODFM channel locked as of this morning (after 12 hours) but there the SNR and power levels don't have any readings. Shouldn't there be some kind of signal information?
Any thoughts on this? This is from cox modem model # CGM4140COM
|
Downstream
|
Channel Bonding Value | ||||||||||||||||||||||||||||||||
| Index |
13
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
11
|
12
|
14
|
15
|
16
|
33
|
34
|
35
|
36
|
37
|
38
|
39
|
40
|
41
|
42
|
43
|
44
|
45
|
46
|
47
|
48
|
159
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lock Status |
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
|
| Frequency |
855 MHz
|
783 MHz
|
789 MHz
|
795 MHz
|
801 MHz
|
807 MHz
|
813 MHz
|
819 MHz
|
825 MHz
|
831 MHz
|
837 MHz
|
843 MHz
|
849 MHz
|
861 MHz
|
867 MHz
|
873 MHz
|
357 MHz
|
363 MHz
|
369 MHz
|
375 MHz
|
381 MHz
|
387 MHz
|
393 MHz
|
399 MHz
|
405 MHz
|
411 MHz
|
417 MHz
|
423 MHz
|
429 MHz
|
435 MHz
|
441 MHz
|
447 MHz
|
300000000
|
| SNR |
42.3 dB
|
43.5 dB
|
43.4 dB
|
43.4 dB
|
43.3 dB
|
43.1 dB
|
43.3 dB
|
43.1 dB
|
42.9 dB
|
42.9 dB
|
42.7 dB
|
42.7 dB
|
42.4 dB
|
42.2 dB
|
42.1 dB
|
41.7 dB
|
45.0 dB
|
45.4 dB
|
45.2 dB
|
45.2 dB
|
45.3 dB
|
45.3 dB
|
45.4 dB
|
45.4 dB
|
45.4 dB
|
45.3 dB
|
45.3 dB
|
45.2 dB
|
45.2 dB
|
45.2 dB
|
45.1 dB
|
45.2 dB
|
NA
|
| Power Level |
2.2 dBmV
|
3.8 dBmV
|
3.7 dBmV
|
3.7 dBmV
|
3.7 dBmV
|
3.5 dBmV
|
3.7 dBmV
|
3.5 dBmV
|
3.3 dBmV
|
3.3 dBmV
|
2.8 dBmV
|
2.7 dBmV
|
2.4 dBmV
|
2.0 dBmV
|
1.9 dBmV
|
1.5 dBmV
|
4.1 dBmV
|
4.1 dBmV
|
4.2 dBmV
|
4.1 dBmV
|
4.3 dBmV
|
4.3 dBmV
|
4.3 dBmV
|
4.3 dBmV
|
4.4 dBmV
|
4.5 dBmV
|
4.5 dBmV
|
4.6 dBmV
|
4.5 dBmV
|
4.5 dBmV
|
4.4 dBmV
|
4.2 dBmV
|
NA
|
| Modulation |
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
|
256 QAM
|
OFDM
|
|
Upstream
|
Channel Bonding Value | ||||||||
| Index |
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
|
|---|---|---|---|---|---|---|---|---|---|
| Lock Status |
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
|
| Frequency |
16 MHz
|
23 MHz
|
29 MHz
|
36 MHz
|
60 MHz
|
67 MHz
|
74 MHz
|
81 MHz
|
|
| Symbol Rate |
5120
|
5120
|
5120
|
5120
|
5120
|
5120
|
5120
|
5120
|
|
| Power Level |
40.5 dBmV
|
41.5 dBmV
|
41.0 dBmV
|
41.0 dBmV
|
41.8 dBmV
|
42.5 dBmV
|
42.5 dBmV
|
43.0 dBmV
|
|
| Modulation |
QAM
|
QAM
|
QAM
|
QAM
|
QAM
|
QAM
|
QAM
|
QAM
|
|
| Channel Type |
ATDMA
|
ATDMA
|
ATDMA
|
ATDMA
|
ATDMA
|
ATDMA
|
ATDMA
|
ATDMA
|
|
| CM Error Codewords | |||||||||||||||||||||||||||||||||
| Index |
1
|
2
|
3
|
4
|
5
|
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
|
33
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Unerrored Codewords |
2985830488
|
2394402663
|
2394409589
|
2394416138
|
2394423578
|
2394430285
|
2394437436
|
2394445207
|
2394453297
|
2394460406
|
2394467767
|
2394474395
|
2394481221
|
2394487381
|
2394494060
|
2394499908
|
2394505276
|
2394512736
|
2394519020
|
2394525227
|
2394531941
|
2394538605
|
2394545097
|
2394551929
|
2394557930
|
2394566396
|
2394573800
|
2394581273
|
2394588059
|
2394595046
|
2394600590
|
2394604125
|
2985830488
|
| Correctable Codewords |
268983428
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
268983428
|
| Uncorrectable Codewords |
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
Hi Maria,
I just sent the team an email with my contact information regarding this post.
I appreciate the response and look forward to hearing back from your team to hopefully figure out what's going on.
Thank you
Nathan
As far as I know, very few areas have 8 upstream channels. Most have 4, and a few have 5 (really more like 4 1/2) due to congestion. Gigablast only supports up to 35 Mbit upstream so 4 channels is more than enough for that. As you pointed out it's odd that the OFDMA channel isn't locked since I think all of Cox is on DOCSIS 3.1 now. That's something a tech would need to investigate. As mentioned, it could be caused by noise issues in the 300 MHz band used by OFDMA.
Moral of the story is that Cox always blames the modem because it's a quick way to get customers off the phone and keep call times down. And very rarely a modem does break down. But it's almost never the modem. It's a good idea to keep up with new technology and upgrade your modem every few years but most of the time when Cox blames the modem they're just plain wrong.
