Question Are these cable modem values good?

[dwd999]

Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables UnCorrectables 1 Locked QAM 256 25 117000000 Hz -0.5 dBmV 40.9 dB 0 0 2 Locked QAM 256 26 123000000 Hz -0.7 dBmV 40.3 dB 0 0 3 Locked QAM 256 27 129000000 Hz -1.2 dBmV 40.3 dB 0 0 4 Locked QAM 256 29 141000000 Hz -0.7 dBmV 40.3 dB 0 0 5 Locked QAM 256 37 189000000 Hz 0.4 dBmV 40.9 dB 12 0 6 Locked QAM 256 41 213000000 Hz 0.7 dBmV 39.9 dB 0 0 7 Locked QAM 256 42 219000000 Hz 0.7 dBmV 39.9 dB 0 0 8 Locked QAM 256 43 225000000 Hz 0.7 dBmV 40.4 dB 0 0 9 Locked QAM 256 44 231000000 Hz 0.9 dBmV 40.4 dB 0 0 10 Locked QAM 256 45 237000000 Hz 1.0 dBmV 41.1 dB 0 0 11 Locked QAM 256 46 243000000 Hz 1.0 dBmV 40.4 dB 0 0 12 Locked QAM 256 47 249000000 Hz 1.2 dBmV 40.4 dB 0 0 13 Locked QAM 256 48 255000000 Hz 1.4 dBmV 39.9 dB 0 0 14 Locked QAM 256 1 735000000 Hz 3.9 dBmV 38.6 dB 0 0 15 Locked QAM 256 2 741000000 Hz 3.5 dBmV 38.9 dB 0 0 16 Locked QAM 256 3 747000000 Hz 3.5 dBmV 38.6 dB 0 0 17 Locked QAM 256 4 753000000 Hz 3.5 dBmV 38.9 dB 0 0 18 Locked QAM 256 5 759000000 Hz 3.4 dBmV 38.6 dB 0 0 19 Locked QAM 256 6 765000000 Hz 3.5 dBmV 38.9 dB 0 0 20 Locked QAM 256 7 771000000 Hz 3.9 dBmV 38.6 dB 0 0 21 Locked QAM 256 8 777000000 Hz 4.0 dBmV 38.9 dB 0 0 22 Locked QAM 256 9 783000000 Hz 4.0 dBmV 38.9 dB 0 0 23 Locked QAM 256 10 789000000 Hz 3.5 dBmV 38.6 dB 0 1 24 Locked QAM 256 11 795000000 Hz 3.2 dBmV 38.9 dB 0 0 25 Locked QAM 256 12 801000000 Hz 3.0 dBmV 38.6 dB 0 0 26 Locked QAM 256 13 807000000 Hz 3.0 dBmV 38.6 dB 0 0 27 Locked QAM 256 14 813000000 Hz 3.0 dBmV 38.6 dB 0 0 28 Locked QAM 256 15 819000000 Hz 3.5 dBmV 38.6 dB 0 0 29 Locked QAM 256 16 825000000 Hz 3.7 dBmV 38.9 dB 0 0 30 Locked QAM 256 21 855000000 Hz 3.5 dBmV 38.2 dB 0 0 31 Locked QAM 256 23 867000000 Hz 3.7 dBmV 38.9 dB 0 0 32 Locked QAM 256 24 873000000 Hz 3.5 dBmV 38.6 dB 0 0

 

[Ralston18]

Arris modem - correct?

Table data is taken from the Downstream Bonded Channels section - correct?

FYI - Referencing the following linkl:

https://arris.my.salesforce-sites.c...ed to be,in relation to the noise on the line.

SNR is good. > 30dB

"If QAM64, SNR should be 23.5 dB or greater (from the link).

Downstream Bonded Channels (from the link):

"In the Downstream Bonded Channels section, verify Power levels are within the acceptable range of - 15 dBmV to + 15 dBmV for each downstream channel."

Also good.

 

[dwd999]

Arris modem - correct?

Table data is taken from the Downstream Bonded Channels section - correct?

FYI - Referencing the following linkl:

https://arris.my.salesforce-sites.com/consumers/articles/General_FAQs/S33-Cable-Signal-Levels#:~:text=The three signal levels that need to be,in relation to the noise on the line.

SNR is good. > 30dB

"If QAM64, SNR should be 23.5 dB or greater (from the link).

Downstream Bonded Channels (from the link):

"In the Downstream Bonded Channels section, verify Power levels are within the acceptable range of - 15 dBmV to + 15 dBmV for each downstream channel."

Also good.

Thanks for the Power level info. Actually its a Netgear CM700. I'm concerned since I've been having problems where the modem works fine when hooked up to one computer but if I hook it up to a router the internet signal goes on and off; tried it with 2 different routers, same problem. I may just bite the bullet next week even if I have to pay to have the cable company service people come over and check the line. Thanks again.

 

[bill001g]

What do you mean it goes on and off. If a pc hooked to the modem has no issues,assuming you tested for a long enough time,there should be no issue with the internet.

Someplace in the modem there should also be a log. You always get some kinds of strange messages that don't seem to hurt anything but if you see any messages around the time you think the connection dropped those might be concerning.

Maybe the router has a message or if it stays down long enough look at the lights on the modem and the router. Mostly does it seem the ethernet connection between the router and the modem is ok.

There really is not difference from the modems view point if you connect a router or a pc. A router is kinda just a small pc that only does the function of sharing the single IP address you get from the ISP to other machine in your house. Some people do use a real pc to do this function when they need more advanced stuff like firewalls or vpn.

If you had not used multiple routers I would be more likely to blame some issue with the router.

My guess would be it is random issue and you just got lucky and it never happened when you were directly connected. Going to have to do more investigation to see what is really going on.

 

[Ralston18]

Most home networks are similar to the following line diagram ( ----- > being an Ethernet cable):

ISP === (coax, DSL, fiber) ===> Modem ---->[WAN Port] NetGear CM700 Router [LAN Port] ----> [LAN port] Wired Network devices

And Router ~~~~~ >Wireless devices.

Feel free to edit and correct my line diagram to present your network connections (topology). Show the ports, WAN, LAN #] as applicable.

= = = =

Make model information for Modem?

What is your incoming connection (coax, DSL, fiber?

Do you lease or own the Modem and/or router?

On the "one computer" run "ipconfig /all" (without quotes) via the Command Prompt.

Copy and Paste the full results into your next post.