Orbi WiFi 7 RBE973
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CM1200 Amber Upstream Light and Occasionally Blinking Downstream Light

spritesaga
Aspirant

CM1200 Amber Upstream Light and Occasionally Blinking Downstream Light

Hey all,

 

I have a brand new Netgear CM1200 modem and Netgear R7000 router. My ISP is Spectrum.

 

On my first day, my upstream light was blinking, but after restarting my modem, now I have a consistent amber light. The downstream light was solid green on my first and second day, but on my third day (Saturday), I've seen it blink once. I fixed this by turning on my fan since I felt my modem was getting a bit hot.

 

Here's my Event Log:

Sat May 09 14:14:30 2020Notice (6)CM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1.;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Sat May 09 14:14:28 2020Notice (6)CM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0.;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Sat May 09 14:14:06 2020Notice (6)CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1.;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Sat May 09 14:13:59 2020Notice (6)CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1.;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Sat May 09 14:12:04 2020Notice (6)CM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1.;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Sat May 09 14:11:39 2020Notice (6)CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1.;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Sat May 09 14:09:18 2020Notice (6)CM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1.;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Sat May 09 14:08:53 2020Notice (6)CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1.;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Sat May 09 14:03:59 2020Notice (6)CM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1.;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Sat May 09 14:03:34 2020Notice (6)CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1.;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Sat May 09 13:59:31 2020Notice (6)CM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1.;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Sat May 09 13:41:14 2020Notice (6)CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1.;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Fri May 08 17:06:55 2020Notice (6)DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1.;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Fri May 08 17:06:50 2020Notice (6)TLV-11 - unrecognized OID;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Fri May 08 17:06:49 2020Error (4)Missing BP Configuration Setting TLV Type: 17.9;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Fri May 08 17:06:49 2020Error (4)Missing BP Configuration Setting TLV Type: 17.8;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Fri May 08 17:06:49 2020Warning (5)DHCP WARNING - Non-critical field invalid in response ;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedNotice (6)Honoring MDD; IP provisioning mode = IPv4
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Fri May 08 16:28:10 2020Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Fri May 08 09:30:32 2020Critical (3)Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;

 

 

 

Some more details:

Startup Procedure
ProcedureStatusComment
Acquire Downstream Channel765000000 HzLocked
Connectivity StateOKOperational
Boot StateOKOperational
SecurityEnabledBPI+
IP Provisioning ModeHonor MDDhonorMdd(4)
 
Downstream Bonded Channels
ChannelLock StatusModulationChannel IDFrequencyPowerSNRCorrectablesUncorrectables
1LockedQAM25631765000000 Hz8.7 dBmV41.1 dB646811336
2LockedQAM2561585000000 Hz7.7 dBmV42.2 dB1001318745
3LockedQAM2562591000000 Hz7.8 dBmV42.3 dB1168218791
4LockedQAM2563597000000 Hz7.8 dBmV36.7 dB1267218591
5LockedQAM2564603000000 Hz7.8 dBmV40 dB1127417031
6LockedQAM2565609000000 Hz7.9 dBmV42.3 dB843715768
7LockedQAM2566615000000 Hz7.8 dBmV42.2 dB1074717519
8LockedQAM2567621000000 Hz7.9 dBmV42.3 dB982117184
9LockedQAM2568627000000 Hz7.8 dBmV42.1 dB1006616619
10LockedQAM2569633000000 Hz7.3 dBmV41.8 dB933416603
11LockedQAM25610639000000 Hz5.8 dBmV41.3 dB1102017128
12LockedQAM25611645000000 Hz5.6 dBmV41.3 dB999116870
13LockedQAM25612651000000 Hz6.8 dBmV41.6 dB944316197
14LockedQAM25613657000000 Hz7.6 dBmV41.9 dB898415909
15LockedQAM25614663000000 Hz8.3 dBmV42 dB830515549
16LockedQAM25615669000000 Hz8.5 dBmV42 dB834714992
17LockedQAM25616675000000 Hz9.2 dBmV41.6 dB808615032
18LockedQAM25617681000000 Hz9 dBmV42.1 dB789215155
19LockedQAM25618687000000 Hz8.3 dBmV41.8 dB802415008
20LockedQAM25619693000000 Hz8.7 dBmV41.9 dB772314796
21LockedQAM25620699000000 Hz8.8 dBmV42 dB771213952
22LockedQAM25621705000000 Hz8.7 dBmV41.9 dB770713753
23LockedQAM25622711000000 Hz8.1 dBmV41.6 dB745913394
24LockedQAM25623717000000 Hz7.4 dBmV41.4 dB750813130
25LockedQAM25624723000000 Hz7.3 dBmV41.3 dB745513240
26LockedQAM25625729000000 Hz8.3 dBmV41.4 dB685112999
27LockedQAM25626735000000 Hz9 dBmV39.6 dB735012435
28LockedQAM25627741000000 Hz9.6 dBmV39.2 dB707112875
29LockedQAM25628747000000 Hz10.2 dBmV38 dB689312782
30LockedQAM25629753000000 Hz10.4 dBmV37.4 dB669012525
31LockedQAM25630759000000 Hz10 dBmV41.5 dB686912108
32Not LockedUnknown00 Hz0.0 dBmV0.0 dB00
 
Upstream Bonded Channels
ChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower
1LockedATDMA45120 Ksym/sec36600000 Hz59 dBmV
2Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
3Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
4Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
5Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
6Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
7Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
8Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
 
Downstream OFDM Channels
ChannelLock
Status
Modulation /
Profile ID
Channel
ID
FrequencyPowerSNR /
MER
Active Subcarrier
Number Range
Unerrored
Codewords
Correctable
Codewords
Uncorrectable
Codewords
1Locked0 ,1159300000000 Hz3.0 dBmV41.9 dB1108 ~ 29872623055680369146528393
2Not Locked000 Hz0 dBmV0.0 dB0 ~ 4095000
 
Upstream OFDMA Channels
ChannelLock StatusModulation / Profile IDChannel IDFrequencyPower
1Not Locked000 Hz0 dBmV
2Not Locked000 Hz0 dBmV

 

----------------------

Would appreciate any thoughts I can get on this matter. Mostly looking to get rid of my amber light if possible, and figuring out why this modem gets a bit hotter than my old modem.

 

Model: CM1200|Nighthawk Multi-Gig Speed Cable Modem, R7000|AC1900 Smart WIFI Router
Message 1 of 17
spritesaga
Aspirant

Re: CM1200 Amber Upstream Light and Occasionally Blinking Downstream Light

After turning off my modem for a few ho and powering it back on after a lengthy period, my upstream light is now flashing green.

Startup Procedure
ProcedureStatusComment
Acquire Downstream Channel765000000 HzLocked
Connectivity StateOKOperational
Boot StateOKOperational
SecurityEnabledBPI+
IP Provisioning ModeHonor MDDhonorMdd(4)
 
Downstream Bonded Channels (Partial Service)
ChannelLock StatusModulationChannel IDFrequencyPowerSNRCorrectablesUncorrectables
1LockedQAM25631765000000 Hz9.4 dBmV41.5 dB00
2LockedQAM2561585000000 Hz8 dBmV42 dB00
3LockedQAM2562591000000 Hz8 dBmV42.1 dB00
4LockedQAM2563597000000 Hz8.1 dBmV37.6 dB00
5LockedQAM2564603000000 Hz8.1 dBmV40.8 dB00
6LockedQAM2565609000000 Hz8.1 dBmV42.2 dB00
7LockedQAM2566615000000 Hz8 dBmV42.1 dB00
8LockedQAM2567621000000 Hz8.1 dBmV42.1 dB00
9LockedQAM2568627000000 Hz8 dBmV42 dB00
10LockedQAM2569633000000 Hz7.5 dBmV41.7 dB00
11LockedQAM25610639000000 Hz5.8 dBmV41 dB00
12LockedQAM25611645000000 Hz5.9 dBmV41.1 dB00
13LockedQAM25612651000000 Hz6.9 dBmV41.4 dB00
14LockedQAM25613657000000 Hz7.8 dBmV41.6 dB00
15LockedQAM25614663000000 Hz8.5 dBmV41.7 dB00
16LockedQAM25615669000000 Hz8.9 dBmV41.8 dB00
17LockedQAM25616675000000 Hz9.5 dBmV41.5 dB00
18LockedQAM25617681000000 Hz9.2 dBmV41.9 dB00
19LockedQAM25618687000000 Hz8.3 dBmV41.6 dB00
20LockedQAM25619693000000 Hz8.7 dBmV41.6 dB00
21LockedQAM25620699000000 Hz8.9 dBmV41.8 dB00
22LockedQAM25621705000000 Hz8.9 dBmV41.7 dB00
23LockedQAM25622711000000 Hz8.3 dBmV41.5 dB00
24LockedQAM25623717000000 Hz7.6 dBmV41.3 dB00
25LockedQAM25624723000000 Hz7.5 dBmV41.2 dB00
26LockedQAM25625729000000 Hz8.4 dBmV41.3 dB00
27LockedQAM25626735000000 Hz9.1 dBmV40.7 dB00
28LockedQAM25627741000000 Hz9.6 dBmV40.1 dB00
29LockedQAM25628747000000 Hz10 dBmV39.8 dB00
30LockedQAM25629753000000 Hz10.3 dBmV39.1 dB00
31LockedQAM25630759000000 Hz10.1 dBmV41.7 dB00
32Not LockedUnknown00 Hz0.0 dBmV0.0 dB00
 
Upstream Bonded Channels (Partial Service)
ChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower
1LockedATDMA15120 Ksym/sec17400000 Hz49.5 dBmV
2Not LockedUnknown20 Ksym/sec17400000 Hz0.0 dBmV
3Not LockedUnknown30 Ksym/sec23800000 Hz0.0 dBmV
4Not LockedUnknown40 Ksym/sec36600000 Hz0.0 dBmV
5Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
6Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
7Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
8Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
 
Downstream OFDM Channels
ChannelLock
Status
Modulation /
Profile ID
Channel
ID
FrequencyPowerSNR /
MER
Active Subcarrier
Number Range
Unerrored
Codewords
Correctable
Codewords
Uncorrectable
Codewords
1Locked0 ,1159300000000 Hz6.0 dBmV42.1 dB1108 ~ 2987323389818435390
2Not Locked000 Hz0 dBmV0.0 dB0 ~ 4095000
 
Upstream OFDMA Channels
ChannelLock StatusModulation / Profile IDChannel IDFrequencyPower
1Not Locked000 Hz0 dBmV
2Not Locked000 Hz

0 dBmV

 

As you can see, I do have a locked bonded channel. My upstream power is less than last time, which I would prefer. But my internet drops if I upload something.

 

 

 
 
 
 
TimePriorityDescription
Sun May 10 00:31:15 2020Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Sun May 10 00:31:15 2020Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Sun May 10 00:31:06 2020Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Sun May 10 00:30:35 2020Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Message 2 of 17
FURRYe38
Guru

Re: CM1200 Amber Upstream Light and Occasionally Blinking Downstream Light

Have the ISP check the signal and line quality UP to the modem. 
Be sure there are not coax cable line splitters in the between the modem and ISP service box. 
Be sure your using good quality RG6 coax cable up to the modem. 

Message 3 of 17
spritesaga
Aspirant

Re: CM1200 Amber Upstream Light and Occasionally Blinking Downstream Light

Sorry to respond late; I wanted to test my connection for an extended period of time. That said, I do want to follow up in case anyone else from the future is searching for an answer to their problem and stumbles across this thread.
 
Shortly after your response, I made a call to Spectrum. They tried out some solutions before scheduling a tech to come diagnose my issue. Here's where it gets interesting—the appointment was canceled on the day of, with no explanation; I also never followed up because my internet was just magically working. My modem has maintained an amber light since that day, but my connection never drops. The modem doesn't get worryingly hot either.
Model: CM1200|Nighthawk Multi-Gig Speed Cable Modem
Message 4 of 17
FURRYe38
Guru

Re: CM1200 Amber Upstream Light and Occasionally Blinking Downstream Light

Might check the channels on the modem to see what is locked in. The ISP may have made some changes on there side.

 

You miight power OFF the modem for 1 minute then back on to see if the LEDs changes. 

Message 5 of 17
kryptoknight
Tutor

Re: CM1200 Amber Upstream Light and Occasionally Blinking Downstream Light

Do you have an update since your last response?  Is the upload light blinking and loss of connection resolved?  Sounds like it was a fix on spectrum side.  I had purchased a CM1200 back in March and had this same issue.  Thinking that it was a defect with the modem I exchanged it for another new one but the new one also had the same problem after a couple days.  When it worked, the CM1200 was getting great speeds.  I ended up returning it for a refund.  But if this problem is fixed, I'm thinking of buying it again.  Can you confirm on your side please?

Message 6 of 17
FURRYe38
Guru

Re: CM1200 Amber Upstream Light and Occasionally Blinking Downstream Light

Any updates regarding this? 


@spritesaga wrote:
Sorry to respond late; I wanted to test my connection for an extended period of time. That said, I do want to follow up in case anyone else from the future is searching for an answer to their problem and stumbles across this thread.
 
Shortly after your response, I made a call to Spectrum. They tried out some solutions before scheduling a tech to come diagnose my issue. Here's where it gets interesting—the appointment was canceled on the day of, with no explanation; I also never followed up because my internet was just magically working. My modem has maintained an amber light since that day, but my connection never drops. The modem doesn't get worryingly hot either.

 

Message 7 of 17
spritesaga
Aspirant

Re: CM1200 Amber Upstream Light and Occasionally Blinking Downstream Light

Somewhat of an update. It's still an ongoing battle. About a month after my last response, my connection dropped again, and my upstream light was once again blinking green. Spectrum sent out a technician who identified an issue with the line being chewed out by a squirrel, possibly, so the technician (Adam) replaced the entire line leading up to cable box outside the home.

 

I was still seeing a blinking green upstream light, but since I live with someone who is considered high-risk IRT COVID-19, I thanked Adam for his help and did not let him into the home. My internet was still dropping every 10-20 minutes, but perhaps 3 hours later, my internet connection finally stabilized despite having the blinking green upstream light.

 

A few days afterwards, my power did go out, so when my power came back on, I continued to have internet issues for the first few hours until my internet had restablized itself even with the blinking green upstream light (I know I sound like a parrot now, but I want to be extra clear when reporting my observations).

 

Very recently, perhaps another month since Adam had replaced the line, my internet randomly dropped again, and continued to sporadically drop for the entire day and midway through the next day as well. I did perform a couple of fixes, but I am not certain as to how effective they were:

  1. I enabled the checkbox in my modem settings for Extended Upstream Power.
  2. I cleared my Firefox history and cache.
  3. I ran a full System Scan with Bitdefender.

Now actions #2 and #3 seem rather silly, but I had recently seen a Reddit post about a Facebook crawler making millions of requests to someone's website; while this post may seem irrelevant, I found myself wondering whether I had any trackers or crawlers consuming my bandwidth in the background, so I carried out actions #2 and #3.

 

I found my internet working again after my Bitdefender system scan had completed hours later, but I was not checking my connection during the scan, and I was not testing my connection immediately after the scan either, so I am led to believe my connection resolved itself for one of these reasons:

  1. My modem got lucky and found a good upstream channel.
  2. Spectrum must have improved their stability.
  3. My Bitdefender scan, while it did not detect or remove any types of malware, may have done something beneficial to my connection.

This is my status as of 7/26/2020. My upstream light is still blinking green, but my connection works reliably (enough to game, use Discord, and work from home via a VPN).

Message 8 of 17
FURRYe38
Guru

Re: CM1200 Amber Upstream Light and Occasionally Blinking Downstream Light

Very interesting. Stil wondering why the uplink LED is blinking still. 

@vkdelta 

Message 9 of 17
vkdelta
NETGEAR Expert

Re: CM1200 Amber Upstream Light and Occasionally Blinking Downstream Light

last screenshot showed it is partial service.

 

Need new screenshot for connection table + event Logs

Message 10 of 17
spritesaga
Aspirant

Re: CM1200 Amber Upstream Light and Occasionally Blinking Downstream Light

Here you go. Although it should be noted I'm not having any major issues right now.

 

Frequency start Value
This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect.
Starting Frequency
 

Startup Procedure

Procedure Status Comment
Acquire Downstream Channel300000000 HzLocked
Connectivity StateOKOperational
Boot StateOKOperational
SecurityEnabledBPI+
IP Provisioning ModeHonor MDDhonorMdd(4)
 

Downstream Bonded Channels (Partial Service)

Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1LockedQAM2561585000000 Hz9.6 dBmV42.4 dB00
2LockedQAM2562591000000 Hz9.7 dBmV42.5 dB00
3LockedQAM2563597000000 Hz9.8 dBmV42.4 dB00
4LockedQAM2564603000000 Hz9.8 dBmV42.4 dB00
5LockedQAM2565609000000 Hz9.8 dBmV42.4 dB00
6LockedQAM2566615000000 Hz9.8 dBmV42.4 dB00
7LockedQAM2567621000000 Hz9.8 dBmV42.3 dB00
8LockedQAM2568627000000 Hz9.7 dBmV42.3 dB00
9LockedQAM2569633000000 Hz9.2 dBmV42 dB00
10LockedQAM25610639000000 Hz7.7 dBmV41.5 dB00
11LockedQAM25611645000000 Hz7.5 dBmV41.4 dB00
12LockedQAM25612651000000 Hz8.4 dBmV41.7 dB00
13LockedQAM25613657000000 Hz9 dBmV41.8 dB00
14LockedQAM25614663000000 Hz9.5 dBmV42 dB00
15LockedQAM25615669000000 Hz9.7 dBmV41.9 dB00
16LockedQAM25616675000000 Hz10.1 dBmV41.5 dB00
17LockedQAM25617681000000 Hz9.9 dBmV42 dB00
18LockedQAM25618687000000 Hz9.3 dBmV41.8 dB00
19LockedQAM25619693000000 Hz9.5 dBmV41.8 dB00
20LockedQAM25620699000000 Hz9.8 dBmV41.8 dB00
21LockedQAM25621705000000 Hz9.6 dBmV41.8 dB00
22LockedQAM25622711000000 Hz9.1 dBmV41.6 dB00
23LockedQAM25623717000000 Hz8.5 dBmV41.4 dB00
24LockedQAM25624723000000 Hz8.5 dBmV41.2 dB00
25LockedQAM25625729000000 Hz9.6 dBmV41.6 dB00
26LockedQAM25626735000000 Hz10.2 dBmV41.8 dB00
27LockedQAM25627741000000 Hz10.8 dBmV41.9 dB00
28LockedQAM25628747000000 Hz11.2 dBmV42 dB00
29LockedQAM25629753000000 Hz11.5 dBmV42.1 dB00
30LockedQAM25630759000000 Hz11.3 dBmV42.1 dB00
31LockedQAM25631765000000 Hz10.4 dBmV41.9 dB00
32Not LockedUnknown00 Hz0.0 dBmV0.0 dB00
 

Upstream Bonded Channels (Partial Service)

Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1LockedATDMA15120 Ksym/sec17400000 Hz43.3 dBmV
2Not LockedUnknown20 Ksym/sec17400000 Hz0.0 dBmV
3Not LockedUnknown30 Ksym/sec23800000 Hz0.0 dBmV
4Not LockedUnknown40 Ksym/sec36600000 Hz0.0 dBmV
5Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
6Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
7Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
8Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
 

Downstream OFDM Channels

Channel Lock
Status
Modulation /
Profile ID
Channel
ID
Frequency Power SNR /
MER
Active Subcarrier
Number Range
Unerrored
Codewords
Correctable
Codewords
Uncorrectable
Codewords
1Locked0 ,1 ,2159300000000 Hz7.8 dBmV42.5 dB1108 ~ 29871314421338911298810490
2Not Locked000 Hz0 dBmV0.0 dB0 ~ 4095000
 

Upstream OFDMA Channels

Channel Lock Status Modulation / Profile ID Channel ID Frequency Power
1Not Locked000 Hz0 dBmV
2Not Locked000 Hz

0 dBmV

 

 

 

 
 
 
Time Priority Description
Mon Jul 27 20:13:36 2020Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Mon Jul 27 20:13:36 2020Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Mon Jul 27 20:13:26 2020Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Mon Jul 27 20:12:56 2020Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Mon Jul 27 20:12:46 2020Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Mon Jul 27 20:12:36 2020Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Mon Jul 27 20:12:16 2020Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Mon Jul 27 20:12:16 2020Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Mon Jul 27 20:12:06 2020Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Mon Jul 27 20:11:36 2020Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Mon Jul 27 20:11:26 2020Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Mon Jul 27 20:11:16 2020Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:36:c9:3d:f1:08;CMTS-MAC=00:6c:bc:b8:34:ea;CM-QOS=1.1;CM-VER=3.1;
Message 11 of 17
vkdelta
NETGEAR Expert

Re: CM1200 Amber Upstream Light and Occasionally Blinking Downstream Light

It is still partial service though.

Message 12 of 17
spritesaga
Aspirant

Re: CM1200 Amber Upstream Light and Occasionally Blinking Downstream Light

Correct, it is still partial service. But it works 🙂

Message 13 of 17
kryptoknight
Tutor

Re: CM1200 Amber Upstream Light and Occasionally Blinking Downstream Light

So I went ahead with the purchase of the CM1200 (again) to replace the Spectrum stock modem (citron).  First day was was normal - CM1200 hooked up to the RAX200.  Recently switched to the gigabit plan with Spectrum.  Speeds tested were good with multiple tests - wasn't really expecting to achieve the full 1gbps download speed but did get substantial improvement over the stock modem.  Approximately 24 hours later, the upload light starting blinking on the CM1200.  Checked cable connection status before and after light blinking and they are the same.  No loss of connection and degradation in speeds for both download and upload.  So I seem to be in the same situation - upload light blinking green on the cm1200 but yet no connection issues.  Just wondering why it's blinking though??   I got 3 upstream bonded channels locked and 1 upstream ofdm channel locked.  See attached for screenshots. of the connected channels.  I have not rebooted the modem yet since the blinking of the light.  Will see what happens on its own in a few days.  Any Netgear folks reading through these community entries??  Are you looking into this??

 

 

CM1200-CableConnection1.jpgCM1200-CableConnection2.jpg

 

 

Message 14 of 17
FURRYe38
Guru

Re: CM1200 Amber Upstream Light and Occasionally Blinking Downstream Light

Do does the Hitron modem do the same thing with the blinking US led? 


@kryptoknight wrote:

So I went ahead with the purchase of the CM1200 (again) to replace the Spectrum stock modem (citron).  First day was was normal - CM1200 hooked up to the RAX200.  Recently switched to the gigabit plan with Spectrum.  Speeds tested were good with multiple tests - wasn't really expecting to achieve the full 1gbps download speed but did get substantial improvement over the stock modem.  Approximately 24 hours later, the upload light starting blinking on the CM1200.  Checked cable connection status before and after light blinking and they are the same.  No loss of connection and degradation in speeds for both download and upload.  So I seem to be in the same situation - upload light blinking green on the cm1200 but yet no connection issues.  Just wondering why it's blinking though??   I got 3 upstream bonded channels locked and 1 upstream ofdm channel locked.  See attached for screenshots. of the connected channels.  I have not rebooted the modem yet since the blinking of the light.  Will see what happens on its own in a few days.  Any Netgear folks reading through these community entries??  Are you looking into this??

 

 

CM1200-CableConnection1.jpgCM1200-CableConnection2.jpg

 

 


 

Message 15 of 17
kryptoknight
Tutor

Re: CM1200 Amber Upstream Light and Occasionally Blinking Downstream Light

Nope.
Message 16 of 17
FURRYe38
Guru

Re: CM1200 Amber Upstream Light and Occasionally Blinking Downstream Light

Something to keep in contact with NG with then. 

Message 17 of 17
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