Community Forum

upload light on netgear cm1200 constantly drops out

Highlighted
Frequent Visitor

upload light on netgear cm1200 constantly drops out

I've had 3 tech appointments with the last one including basically replacing all fittings and even a supervisor came to my house. They said all the connections are great. Within 10 hours of them leaving upload light on modem starting flashing and crashed my internet. This morning it took 5 restarts of my modem to since to internet. Within 2 hours it has crashed and now no connectivity.
Highlighted
Expert

Re: upload light on netgear cm1200 constantly drops out

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 ?




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!
Highlighted
Frequent Visitor

Re: upload light on netgear cm1200 constantly drops out

 
 
Apply               Cancel     
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

ProcedureStatusComment
Acquire Downstream Channel405000000 HzLocked
Connectivity StateOKOperational
Boot StateOKOperational
SecurityEnabledBPI+
IP Provisioning ModeHonor MDDhonorMdd(4)
 

Downstream Bonded Channels

ChannelLock StatusModulationChannel IDFrequencyPowerSNRCorrectablesUncorrectables
1LockedQAM2564405000000 Hz3.4 dBmV43 dB00
2LockedQAM2565411000000 Hz4.1 dBmV43.5 dB00
3LockedQAM2566417000000 Hz4.4 dBmV43.7 dB00
4LockedQAM2567423000000 Hz4.3 dBmV43.5 dB00
5LockedQAM2568429000000 Hz4.1 dBmV43.3 dB00
6LockedQAM2569435000000 Hz4.2 dBmV43.3 dB00
7LockedQAM25610441000000 Hz4.4 dBmV43.4 dB00
8LockedQAM25611447000000 Hz4.9 dBmV43.7 dB00
9LockedQAM25612453000000 Hz5.3 dBmV43.9 dB00
10LockedQAM25613459000000 Hz5.2 dBmV43.8 dB00
11LockedQAM25614465000000 Hz4.9 dBmV43.4 dB00
12LockedQAM25615471000000 Hz4.8 dBmV43.3 dB00
13LockedQAM25616477000000 Hz5.1 dBmV43.4 dB00
14LockedQAM25617483000000 Hz5.7 dBmV43.8 dB00
15LockedQAM25618489000000 Hz6 dBmV44.1 dB00
16LockedQAM25619495000000 Hz5.8 dBmV43.8 dB00
17LockedQAM25620507000000 Hz5.7 dBmV43.5 dB00
18LockedQAM25621513000000 Hz5.9 dBmV43.6 dB00
19LockedQAM25622519000000 Hz6.1 dBmV43.8 dB00
20LockedQAM25623525000000 Hz6.5 dBmV44 dB00
21LockedQAM25624531000000 Hz6.6 dBmV44 dB00
22LockedQAM25625537000000 Hz6.2 dBmV43.7 dB00
23LockedQAM25626543000000 Hz6 dBmV43.6 dB00
24LockedQAM25627549000000 Hz6.4 dBmV43.8 dB00
25LockedQAM25628555000000 Hz6.7 dBmV44 dB00
26LockedQAM25629561000000 Hz6.4 dBmV43.8 dB00
27LockedQAM25630567000000 Hz6.1 dBmV43.7 dB00
28LockedQAM25631573000000 Hz6 dBmV43.5 dB00
29LockedQAM25632579000000 Hz6.1 dBmV43.6 dB00
30LockedQAM25633585000000 Hz6.3 dBmV43.7 dB00
31LockedQAM25634591000000 Hz6.5 dBmV43.8 dB00
32Not LockedUnknown00 Hz0.0 dBmV0.0 dB00
 

Upstream Bonded Channels

ChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower
1LockedATDMA15120 Ksym/sec17300000 Hz43.3 dBmV
2LockedATDMA25120 Ksym/sec23700000 Hz43 dBmV
3LockedATDMA35120 Ksym/sec30100000 Hz43.3 dBmV
4LockedATDMA45120 Ksym/sec36500000 Hz42.3 dBmV
5LockedATDMA51280 Ksym/sec41200000 Hz41.8 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 ,1 ,2 ,348722000000 Hz5.6 dBmV42.6 dB1108 ~ 2987234927816495360
2Not Locked000 Hz0 dBmV0.0 dB0 ~ 4095000
 

Upstream OFDMA Channels

ChannelLock StatusModulation / Profile IDChannel IDFrequencyPower
1Not Locked000 Hz0 dBmV
2Not Locked000 Hz0 dBmV
Highlighted
Frequent Visitor

Re: upload light on netgear cm1200 constantly drops out

These are the result directly following a full modem factory reset. 

Highlighted
Expert

Re: upload light on netgear cm1200 constantly drops out

Post again in 24 hours. Don't reset the modem.



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!