Intermittent connection cm1200

[ETermin]

Hey all, I'm a bit of a loss so I figured I would ask here. I'm losing downstream connectivity intermittently. My isp (mediacom) is blaming the modem which is less than a year old. I had no issues until recently. The technician that was out checking things said the cm 1200 was no longer on their supported list. So I was wondering what else could I check to try to get a stable connection?

Will post logs in next post(s)

[FURRYe38]

What is the brand and model of the host wifi router connected to the modem?

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-Mod...
https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router?article=24311
https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html

[ETermin]

I'm sorry the upload was being a bit finicky. I uploaded it to the image below from my phone. I don't know why it wouldn't let me post directly.

[FURRYe38]

Power levels are ok, however you have correct and un-correctables that should be zeros. 

Check all of the coax line connections and jack fittings. Remove any coax line splitters to test. 

What is your ISP speeds UP and Down that you pay for? 

[ETermin]

I pay for 400D/30U and im getting 494D/41D. As for the uncorrectables Im not sure what is causing them i can double check all the connections. This just started a few months again and has slowly become more of a nuisance.

[FURRYe38]

ISP needs to check into this as well...keep on them. 

[ETermin]

they had a tech out previously and said everthing was fine and blamed the modem since it wasnt on their supported list anymore. (it was previously)
they only support the following NG modems now, cm1000, cm1100, and cm2000

[FURRYe38]

That's funny, the 1200 is just a CM1100 with extra ports. 😒

[ETermin]

thats what i thought so i made sure LAG was turned off.

[ETermin]

okay so i jsut installed my ISP's modem for the meantime, in comparison this is what they show

Upstream Bonding

Channel ID Lock Status Modulation Power Level Symbol Rate

1	Locked	64-qam	51.3 dBmV	5120000
2	Locked	64-qam	49.3 dBmV	5120000
3	Locked	64-qam	48.0 dBmV	5120000
4	Locked	64-qam	46.5 dBmV	5120000

Downstream Bonding

Channel ID Lock Status Modulation Power Level SNR Level

1	Locked	256-QAM	5.4 dBmV	40.6 dB
2	Locked	256-QAM	5.6 dBmV	40.7 dB
3	Locked	256-QAM	5.7 dBmV	40.8 dB
4	Locked	256-QAM	5.7 dBmV	40.8 dB
5	Locked	256-QAM	6.0 dBmV	39.7 dB
6	Locked	256-QAM	6.1 dBmV	39.7 dB
7	Locked	256-QAM	5.8 dBmV	39.1 dB
8	Locked	256-QAM	5.8 dBmV	39.0 dB
9	Locked	256-QAM	5.7 dBmV	38.7 dB
10	Locked	256-QAM	5.6 dBmV	38.9 dB
11	Locked	256-QAM	5.4 dBmV	39.0 dB
12	Locked	256-QAM	5.6 dBmV	39.3 dB
13	Locked	256-QAM	5.8 dBmV	39.9 dB
14	Locked	256-QAM	5.5 dBmV	39.8 dB
15	Locked	256-QAM	5.5 dBmV	40.3 dB
16	Locked	256-QAM	5.4 dBmV	39.5 dB
17	Locked	256-QAM	5.4 dBmV	39.7 dB
18	Locked	256-QAM	5.6 dBmV	38.7 dB
19	Locked	256-QAM	5.7 dBmV	38.6 dB
20	Locked	256-QAM	5.8 dBmV	38.5 dB
21	Locked	256-QAM	5.9 dBmV	38.3 dB
22	Locked	256-QAM	5.9 dBmV	38.1 dB
23	Locked	256-QAM	5.8 dBmV	37.9 dB
24	Locked	256-QAM	5.9 dBmV	37.1 dB
200	Locked	OFDM	3.1 dBmV	38.18 dB