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Frequent Modem reboots needed to restore speed

HeadphoneJackHeadphoneJack Posts: 1
in Connectivity Jan 16, 2020

I'm having to reboot my modem (Netgear CM500, FirmwareV1.01.09)  once every couple of days to restore speeds. I'm getting 15mb down when speed testing, and after modem reboot I get closer to the 400mb down that I'm paying for. It's happening again today. Here are the modem info /  logs: 

Downstream Bonded Channels (Partial Service)
ChannelLock StatusModulationChannel IDFrequencyPowerSNRCorrectablesUncorrectables
1LockedQAM2563585000000 Hz-13.4 dBmV35.9 dB70
2LockedQAM2565603000000 Hz-20.2 dBmV30.1 dB205910
3LockedQAM2567615000000 Hz-17.1 dBmV33 dB2340
4LockedQAM2568621000000 Hz-18.2 dBmV32 dB2480
5LockedQAM25612645000000 Hz-19.7 dBmV30.8 dB11210
6LockedQAM25614657000000 Hz-21.7 dBmV29 dB4365130
7LockedQAM25615663000000 Hz-22.1 dBmV28.7 dB15920840
8LockedQAM25616669000000 Hz-22.4 dBmV28.4 dB36873800
9LockedQAM25617675000000 Hz-22 dBmV28.5 dB835007665
10LockedQAM25618681000000 Hz-20.9 dBmV29.8 dB1360190
11LockedQAM25619687000000 Hz-19.2 dBmV31.4 dB6790
12LockedQAM25621699000000 Hz-24.3 dBmV26.6 dB2032957446777335
13Not LockedUnknown22705000000 Hz0.0 dBmV0.0 dB00
14Not LockedUnknown26729000000 Hz0.0 dBmV0.0 dB00
15Not LockedUnknown28741000000 Hz0.0 dBmV0.0 dB00
16Not LockedUnknown31759000000 Hz0.0 dBmV0.0 dB00


Upstream Bonded Channels
ChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower
1LockedATDMA655120 Ksym/sec17600000 Hz40.5 dBmV
2LockedATDMA665120 Ksym/sec24000000 Hz40.5 dBmV
3LockedATDMA675120 Ksym/sec30400000 Hz44.5 dBmV
4LockedATDMA685120 Ksym/sec36800000 Hz44.3 dBmV


I'm getting various (infrequent) errors in the logs such as:

- Missing BP Configuration Setting TLV Type

- SYNC Timing Synchronization failure - Failed to acquire FEC framing

- Started Unicast Maintenance Ranging - No Response received


I'm in Ohio. Does anyone have any insight based on the above info?




  • RAIST5150RAIST5150 Posts: 633 ✭✭✭✭
    Jan 16, 2020
    Need a tech to check all your connections and lines.

    Signal levels are dropping below minimum specs, and you don't appear to be bonding all channels. Modem can grab 16 and the system should have at least 24 usable channels (if not 32) available by now.

    ... at least I hope they don't still have the older 2.x spec hardware out there not providing enough channels for all the 3.x spec bandwidth plans they are selling.
  • LGTLGT Posts: 94 ✭✭✭✭
    Jan 16, 2020

    Agree. You need to call Spectrum. Your downstream numbers are terrible. The amazing part is you get service at all. There is definitely a problem with your cabling somewhere. 

This discussion has been closed.