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Aspirant

Do I need a new cable modem?

I purchased this equipment (c7000v2) two years ago this month.   Over the past couple of weeks my download speeds have been erratic.  I contacted Comcast who did their thing and they found nothing wrong from their end and suggested it could be time to replace my cable modem.    Netgear still sells this equipment so it isn't outdated.   There have been no recent changes in my equipment, devices connected or my usage.    I'm kind of at an impass.   Any thoughts?

Model: C7000|Nighthawk - AC1900 WiFi Cable Modem Router
Message 1 of 5
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Guru

Re: Do I need a new cable modem?

Do you have a screen snip of your cable connections page and the modem logs? Attach those back on here. 

If you have any splitters, amplifiers, or attenuators in your coax line, remove them. 

Is it just wired device, wireless devices, or both having the issue? 

CM2000-> Arris W31-> GS716v2-> TP-Link M9Plus
Message 2 of 5
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Aspirant

Re: Do I need a new cable modem?

Yes, I do have splitters but I have to use them.  They have been in use for years.    I use wireless only.  I copied and pasted the info on my cable connection.  I hope that will work.   Thanks!
 
Cable Connection
 
 
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 Channel561000000 HzLocked
Connectivity StateOKOperational
Boot StateOKOperational
SecurityEnabledBPI+
IP Provisioning ModeHonor MDDhonorMdd(4)
 
Downstream Bonded Channels
ChannelLock StatusModulationChannel IDFrequencyPowerSNRCorrectablesUncorrectables
1LockedQAM25616561000000 Hz-1.1 dBmV39.7 dB00
2LockedQAM2561465000000 Hz-2.3 dBmV39.9 dB00
3LockedQAM2562471000000 Hz-2.6 dBmV39.8 dB00
4LockedQAM2563477000000 Hz-2.1 dBmV40.1 dB00
5LockedQAM2564483000000 Hz-2.6 dBmV39.9 dB00
6LockedQAM2565489000000 Hz-2.1 dBmV40.1 dB00
7LockedQAM2566495000000 Hz-2.1 dBmV39.4 dB00
8LockedQAM2568507000000 Hz-1.9 dBmV39.5 dB00
9LockedQAM2569513000000 Hz-2.2 dBmV39.9 dB00
10LockedQAM25610519000000 Hz-1.6 dBmV40.1 dB00
11LockedQAM25611525000000 Hz-1.8 dBmV40 dB00
12LockedQAM25612531000000 Hz-1.8 dBmV40 dB00
13LockedQAM25613537000000 Hz-1.4 dBmV39.9 dB00
14LockedQAM25620585000000 Hz-1.2 dBmV40.2 dB00
15LockedQAM25623603000000 Hz-0.6 dBmV40.3 dB00
16LockedQAM25624609000000 Hz-0.4 dBmV40.3 dB00
17LockedQAM25627615000000 Hz-0.4 dBmV41.4 dB00
18LockedQAM25626621000000 Hz0.2 dBmV41.9 dB00
19LockedQAM25628627000000 Hz-0.4 dBmV41.4 dB00
20LockedQAM25629633000000 Hz0.2 dBmV41.9 dB00
21LockedQAM25630639000000 Hz0.1 dBmV41.4 dB00
22LockedQAM25631645000000 Hz0.2 dBmV41.9 dB00
23LockedQAM25632651000000 Hz0.6 dBmV42 dB00
24LockedQAM25633657000000 Hz0 dBmV41.9 dB00
 
Upstream Bonded Channels
ChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower
1LockedATDMA91280 Ksym/sec39600000 Hz45.3 dBmV
2LockedATDMA15120 Ksym/sec35600000 Hz45 dBmV
3LockedATDMA25120 Ksym/sec29200000 Hz45.8 dBmV
4LockedATDMA35120 Ksym/sec22800000 Hz45.5 dBmV
5LockedATDMA45120 Ksym/sec16400000 Hz45.5 dBmV
6Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
7Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
8Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
 
Extended Upstream Transmit Power
Enable Extended Upstream Transmit Power
 
Current System Time:Wed Sep 02 23:13:51 2020
System Up Time:04:37:00
Message 3 of 5
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Guru

Re: Do I need a new cable modem?

try hardwiring in a device to test your speeds and to check stability. If it drops when the wireless is having an issue, then it could be a hardware failure. 

If it doesn't, it could just be a wireless interference issue. 

have you notices if the issue is using the 2.4ghz or 5ghz signal? 

2.4ghz broadcasts further and through more materials but is much much slower and suffers from more interference. 

You can go in and try changing what channels the 2.4ghz and 5ghz broadcasts on

CM2000-> Arris W31-> GS716v2-> TP-Link M9Plus
Message 4 of 5
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Aspirant

Re: Do I need a new cable modem?

Thanks for the suggestions.  I will look at the channels and adjust the connections.   Thanks!

Message 5 of 5
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