CM1000 Upstream Light Keeps Turning Amber

Question

Hello all,&nbsp;&nbsp;I've been trying for weeks to resolve an issue with a Netgear ADT Hub. ADT has been out several times to no avail. I've tried everything but can't seem to locate the problem. The only network component I haven't changed out is my Netgear CM1000 modem. I have noticed that there are periods of time when the upstream light is solid amber. Most of the time it is green, but I am wondering if this issue may be contributory.&nbsp;&nbsp;A quick glance at the manual suggests this indicates that only ONE upstream channel locked but indicates this is WNL. Could this be contibuting to my ADT Hub problem? If so, can anyone suggest a possible solution?&nbsp;Thanks!

FURRYe38 · Answer

Please post a copy and paste of the modems connection status page.
Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.
Be sure there are no 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.
Be sure to power OFF the modem for 1 minute then back ON.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Modems/m-p/1530376#M12853

plemans · Answer

Are you using an amplifier on the coax line? Or a signal attenuator?
Based off the power of your downstream channels, your upstream is rather high. (high enough to cause issues)
Reason I ask is,&nbsp;when you're close to a hub, your downstream will be higher and the upstream tends to run lower.&nbsp;
If you're further away, you have lower downstream and higher upstream. Your numbers downstream indicate you're close to a hub but your upstream indicates your further away. so somethings a bit funky there.&nbsp;
Got a copy of the event logs?

EMH · Answer

plemans&nbsp;&nbsp;Great call. I do have an amplifier in the system, but since I cancelled cable a couple of years ago, I am wondering about its necessity. I will have to address that as soon as I am able.&nbsp;&nbsp;I am learning (I think) much from your and Furry's posts. I intend to explore such things more when I have a bit longer window to address.&nbsp;In short - I have the ADT hub up and running again. After hours spent re-routing, by-passing and exchanging out components, it is working again with the original hardware configuration. I am not certain that this was the fix, but Furry's reminder of the basics did cause me to think about the coax cables again and whether they were all firmly connected. I worked from the cable modem backwards re-tightening all connections. Thereafter, the upstream channel locks inceased and the recertification if the ADT hub went through. KISS principle strikes again (I believe).&nbsp;To be sure there is more in the system to tweak. I'll provide more information in the log to address the power discrepancies later on and get back to you both. Thank you very much for you help to date.&nbsp;

EMH · Answer

&nbsp;FURRYe38&nbsp;- Thanks for the info. All measures have been taken.&nbsp;Please post a copy and paste of the modems connection status page. &lt;- done, upstream status light is green at the moment.&nbsp;Have the ISP check the signal and line quality UP to the modem.&nbsp;Be sure the ISP provisions the modem correctly.&nbsp;&lt;- checkBe sure there are no coax cable line splitters in the between the modem and ISP service box.&nbsp;&lt;- checkBe sure your using good quality RG6 coax cable up to the modem.&nbsp;&lt;- check, including drop line.Be sure to power OFF the modem for 1 minute then back ON.&nbsp;&lt;- done for 3" at a time (more than once during troubleshooting).&nbsp;&nbsp;Could you explain the potential issues associated with only locking one upstrem channel?&nbsp;Cable ConnectionProcedureStatusCommentAcquire Downstream Channel429000000 HzLockedConnectivity StateOKOperationalBoot StateOKOperationalSecurityEnableBPI+IP Provisioning ModeHonor MDDIPv4 onlyDownstream Bonded Channels&nbsp;ChannelLock StatusModulationChannel IDFrequencyPowerSNR / MERUnerrored CodewordsCorrectable CodewordsUncorrectable Codewords1LockedQAM25645429000000 Hz5.9 dBmV42.5 dB372483566002LockedQAM2561783000000 Hz4.1 dBmV41.5 dB371516651003LockedQAM2562789000000 Hz3.7 dBmV41.3 dB371519622004LockedQAM2563795000000 Hz3.6 dBmV41.2 dB371523720005LockedQAM2565807000000 Hz3.4 dBmV40.9 dB371527756006LockedQAM25613855000000 Hz3.2 dBmV40.4 dB371531393007LockedQAM25615867000000 Hz2.6 dBmV40.3 dB371535192008LockedQAM25616873000000 Hz2.4 dBmV40.2 dB371537538009LockedQAM25617879000000 Hz1.9 dBmV40.0 dB3715419320010LockedQAM25618885000000 Hz1.6 dBmV40.0 dB3715455770011LockedQAM25619891000000 Hz1.9 dBmV40.0 dB3715492100012LockedQAM25620897000000 Hz1.9 dBmV40.1 dB3715529390013LockedQAM25621903000000 Hz1.8 dBmV40.0 dB3715568710014LockedQAM25622909000000 Hz0.4 dBmV39.4 dB3715604350015LockedQAM25623915000000 Hz0.2 dBmV39.2 dB3715642580016LockedQAM25624921000000 Hz-0.5 dBmV38.9 dB3715679490017LockedQAM25629951000000 Hz0.0 dBmV38.8 dB3715716680018LockedQAM25633357000000 Hz4.3 dBmV41.5 dB3715750090019LockedQAM25634363000000 Hz4.7 dBmV41.9 dB3715790600020LockedQAM25635369000000 Hz4.7 dBmV42.0 dB3715830920021LockedQAM25636375000000 Hz5.2 dBmV42.1 dB3715862160022LockedQAM25637381000000 Hz5.2 dBmV42.1 dB3715903880023LockedQAM25638387000000 Hz5.4 dBmV42.3 dB3715938520024LockedQAM25639393000000 Hz5.3 dBmV42.3 dB3715975700025LockedQAM25640399000000 Hz5.5 dBmV42.3 dB3716013360026LockedQAM25641405000000 Hz5.4 dBmV42.3 dB3716049170027LockedQAM25642411000000 Hz5.8 dBmV42.4 dB3716092270028LockedQAM25643417000000 Hz5.6 dBmV42.4 dB3716127310029LockedQAM25644423000000 Hz5.9 dBmV42.5 dB3716160290030LockedQAM25646435000000 Hz6.2 dBmV42.6 dB3716196660031LockedQAM25647441000000 Hz5.8 dBmV42.6 dB3716215370032LockedQAM25648447000000 Hz5.9 dBmV42.7 dB37162134100&nbsp;Upstream Bonded Channels&nbsp;ChannelLock StatusModulationChannel IDFrequencyPower1LockedATDMA119300000 Hz58.3 dBmV2LockedATDMA225800000 Hz58.3 dBmV3LockedATDMA332200000 Hz58.3 dBmV4LockedATDMA438600000 Hz58.3 dBmV5LockedATDMA614500000 Hz55.3 dBmV6Not LockedUnknown00 Hz0.0 dBmV7Not LockedUnknown00 Hz0.0 dBmV8Not LockedUnknown00 Hz0.0 dBmVDownstream OFDM Channels&nbsp;ChannelLock StatusModulation / Profile IDChannel IDFrequencyPowerSNR / MERActive Subcarrier Number RangeUnerrored CodewordsCorrectable CodewordsUncorrectable Codewords1Locked0, 1, 2, 3159300000000 Hz9.3 dBmV42.8 dB1108 ~ 2987405553628614373644122Not Locked000 Hz4.5 dBmV0.0 dB0 ~ 4095000&nbsp;Upstream OFDMA Channels&nbsp;ChannelLock StatusModulation / Profile IDChannel IDFrequencyPower1Not LockedUnknown00 Hz0 dBmV2Not LockedUnknown00 Hz0 dBmVCurrent System Time:&nbsp;Mon Aug 16 15:54:14 2021 System Up Time:&nbsp;2:16:57

EMH · Answer

Interesting.Firmware lised for my&nbsp;CM1000-1AZNAS&nbsp;for my ISP: V3.01.04My firmware: V6.01.07&nbsp;Does the ISP push these down? If not, how else could I have gotten there if I didn't do it myself?&nbsp;Thanks!

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CM1000 Upstream Light Keeps Turning Amber

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