netgear c7000 combo modem error questions

the other modem they were not there either so how can i get this fixed? i was on the phone with tech trying to get this modem connected and they did not notice that, but they did have a time with connections..

when i look at the basic-cable connections where is show all the connections i see tons of correctibles. so what ar those? and can i n=move the starting frequency around to make thst correctibls go away? or is that given to  me by the cable company?  

my last modem i think got spiked eith by a power outage 2 weeks ago or by me when i was testing the breakers for installing a generator, and i turned off the breaker to themodem a few times in a row and i may have spiked it. it is on a surge protector power strip, but a spike may have got thru. or that modem just failed.  but after that failure started and i was getting just about every time i went to any site on the internet, i got this site is not safe and i got blocked. 

i thought comcast at that time put a block on my internet but i did get thru somtimes. the last time they put a filter/block on my internet, i still got cable but no internet and they said i was broadcasting. i do not understand that as i have one line from the pole tap to the house ground block and then on into the house to the modem. at that point they put in a splitter that has the output taps that say -3.5 on them. one goes to the tv and one goes to the modem.  i did take the cable off that splitter and connected the modem thry a barrel connector to the modem and nothing changed, so i figure that splitter is still good. in fact when i cleared the logs and they came back the same. and then i turned off the modem to reset it and they were the same.

they told me i have 1 upstream becasue i have 5mbps upstream, that was the same with the other modem, that modem had 8x4  the new modem has 24x8  and i do see the 24 channel down but still 1 up. thanks

i did and it did not change when i did that a few days ago.  also i just had the cable off the modem for like 30 minutes as i drilled holes in the floor joists and re ran the cable thru them and back to the modem. this time i did not put any bends, i pushed the 3' extra cable up into the support for the floor joists and that gave it a relaxed curve. and i did chack the cable for nicks and nothing out of the ordanary.  i do have some rg6 form the cable company my brother gave me and i'm leaning on running that from the ground block thru the house, istead of along the aluminum siding like they did.

anyway after i reconnected the cable back and the modem came back online almost instantly the errors all came back.  so it is either the modem of which i'm not thinking is causeing that as the old failing modem ahd the exact same issue. so i'm goint to start a chant sith comcast and schedule a high level tech to stop out and fix it. unless they tell me they can't fix it. then i may just cancel cable and go with frountier. as i already use ota for tv and on the cable box all i get is the same channels. and believe it or not when the ots is out so it the same cable channels. i only have the cable because it was cheaper for the bundle that just internet.

when i was on the phone last night with the tech they made me go to comcast's speed test not the speedtest.net. they said the comcast speed test was all they can go by.  i just now did the comcast test and i get 92mbps out of the 100mbps i pay for. then on the speedtest.net site i get 25mbps.  

i still have 0 correctibles and un correctibles so that is good. maybe all those errors i'm seeing are not that important if i get online and everything i do seems normal. so maybe i'm messing with things that are of no realavance to me? but ihave 30 day to keep this modem and that is one reason i'm after it because if it turns out to be bad i need to return it before the 30 days are up or i'm out 150$ that i do not want to eat for a bad modem. thanks

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@corvairbob wrote:

 

i get 35mbps on speedtest.net but 115 on comcast so what one is the truth?

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The reason that their *in house* speed tests show faster speed is because their speed testing servers lie on *their* network's edge, therefore they are not subject to any third party's potential backbone deficiencies / routing deficiencies / distance related latency issues etc;

https://www.dslreports.com/forum/r31251250-

ok this is what i did. i can't say that it is the 100% fix yet only time is going to tell .  

based on the reply form  eg entered below my reply,  i got a kit that lets me reterminate the cable ends. to what comcast used. now theya re all the same from the pole to the device and tv.  

then after about 8 hours it seemed to reset and now it is working ok speed back up and steady at 120mpbs

 ed's reply thanks ed.

FWIW, noise ingress into the lines / return path somewhere can also cause the un-bonding of the upstream channels. 

There are other signal stat figures that can't be read by the modem. They are the "Upstream Rx Power" (Upstream Receive Power Level), the "Upstream SNR Ch." (Upstream Signal To Noise Ratio), and the "Upstream ICFR" (In Channel Frequency Response). These are as equally important in diagnosing connectivity issues as are the modem's stats.

O/k good. Hope things hold up for you ! Marked "answered" thread now being closed. Please post back with a new topic if the issue returns.