# Reset modem through node red **URL:** \ **Category:** General\ **Created:** [12 September 2020 14:22 UTC](https://discourse.nodered.org/t/reset-modem-through-node-red/32778 "2020-09-12T14:22:40Z")\ **Posts on this page:** 13\ **Page:** 2

**Author:** ![Nodi.Rubrum](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/nodi.rubrum/32/107482_2.png) [@Nodi.Rubrum](https://discourse.nodered.org/u/Nodi.Rubrum)\ **Post date:** [15 September 2020 02:16 UTC](https://discourse.nodered.org/t/reset-modem-through-node-red/32778/21 "2020-09-15T02:16:51Z")

If you are getting odd noise when you talk on a call, that is an upstream issue, if people say you are breaking up, choppy for example. If you hear breaking up of voices, or choppy, that is a downstream issue. Make sure you don't here any breaking of audio (up or down) when NO ONE else is using your bandwidth, that will define your baseline is ok. If you get bad quality when no one else is using your bandwidth, that means either your ISP is limiting something or you are sending and receiving a lot of bad data or modem maybe retrying to get good data. You should have power between 10/-10, which is ok for most modems. For your make and modem of modem there should be a specification sheet on what is normal ranges, and your ISP should publish the same as well. As for your ping returns say to [www.google.com](http://www.google.com) being both faster and slower, that could be from a number of scenarios. Need more data to know if that is an issue or not. Each route of a ping can vary greatly based on what others are doing at the time you do the ping test. Cable is a SHARED bus, so if others are streaming a lot, you would expect your pings to be slow, etc. Do you have any view that shows the correctable and uncorrectable codeword errors? This is also a good metric for tracking issues. Here is a snapshot of my cable modem... ```auto Downstream Bonding Channel Value Channel ID 15 16 17 18 19 20 21 22 Frequency 663000000 Hz 669000000 Hz 675000000 Hz 681000000 Hz 687000000 Hz 693000000 Hz 699000000 Hz 705000000 Hz Signal to Noise Ratio 36 dB 36 dB 36 dB 36 dB 37 dB 36 dB 36 dB 36 dB Downstream Modulation QAM256 QAM256 QAM256 QAM256 QAM256 QAM256 QAM256 QAM256 Power Level The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading -9 dBmV -9 dBmV -9 dBmV -9 dBmV -9 dBmV -9 dBmV -10 dBmV -10 dBmV Upstream Bonding Channel Value Channel ID 17 20 19 18 Frequency 17800000 Hz 37000000 Hz 30600000 Hz 24200000 Hz Ranging Service ID 9281 9281 9281 9281 Symbol Rate 5.120 Msym/sec 5.120 Msym/sec 5.120 Msym/sec 5.120 Msym/sec Power Level 44 dBmV 47 dBmV 46 dBmV 45 dBmV Upstream Modulation [3] QPSK [1] 16QAM [2] 64QAM [3] QPSK [1] 16QAM [2] 64QAM [3] QPSK [1] 16QAM [2] 64QAM [3] QPSK [1] 16QAM [2] 64QAM Ranging Status Success Success Success Success Signal Stats (Codewords) Bonding Channel Value Channel ID 15 16 17 18 19 20 21 22 Total Unerrored Codewords 3782278605 3782294806 3782259374 3782317826 3782261177 3782258912 3782254714 3782258905 Total Correctable Codewords 8780 9058 10931 4134 687 3032 9960 4669 Total Uncorrectable Codewords 1661 2428 1458 1527 2111 1658 620 2687 ``` Here is the datasheet for my modem... [https://arris.secure.force.com/consumers/articles/General\_FAQs/SB6141-Cable-Signal-Level/?l=en\_US&fs=RelatedArticle#:~:text=Acceptable%20SNR%20Levels%20(dB)%3A,be%2033%20dB%20or%20greater](https://arris.secure.force.com/consumers/articles/General_FAQs/SB6141-Cable-Signal-Level/?l=en_US&fs=RelatedArticle#:~:text=Acceptable%20SNR%20Levels%20(dB)%3A,be%2033%20dB%20or%20greater). Notice my downstream SNR is below 39, the higher the better is the general rule, but it varies based on the QAM settings, so I have good quality signals coming my AMP, and I have a signal filter on the AMP, so that helps keep the SNR up even though by cable modem is a long distance from my AMP and the ISP hub. But too high is also an issue, which most tutorials do not explain as an issue. But lets ignore that for now. My upstream SNR is a bit off specification, but again, I have a long distance between point to point as noted above. As long as I am just gaming and surfing, I am not sending a lot of data back to the ISP compared to a business or such, so I am not flooding the up channels. Thus a bit more noise, or lower ratio is ok. If either my downstream or upstream signals degrade, I will see the correctable and uncorrectable errors start adding up faster than in the past. As you can (not) see my error counts are low and stay low... no spiking. ---

**Author:** ![Nodi.Rubrum](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/nodi.rubrum/32/107482_2.png) [@Nodi.Rubrum](https://discourse.nodered.org/u/Nodi.Rubrum)\ **Post date:** [15 September 2020 02:29 UTC](https://discourse.nodered.org/t/reset-modem-through-node-red/32778/22 "2020-09-15T02:29:30Z")

If you can see the codeword counts and the modem logs, to watch the number of line resets, then you can develop over time a good baseline and have NR report anything that varies against the baseline. This is what I do as well. The second I see an increase of resets (and the ISP is not pushing firmware updates or such) or the number of uncorrectable codewords spikes, I have reason to talk to my ISP. Of course if the SNR goes above 40 for downstream and above 45 for upstream in my case as well I talk to my ISP. ---

**Author:** ![Nodi.Rubrum](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/nodi.rubrum/32/107482_2.png) [@Nodi.Rubrum](https://discourse.nodered.org/u/Nodi.Rubrum)\ **Post date:** [15 September 2020 02:43 UTC](https://discourse.nodered.org/t/reset-modem-through-node-red/32778/23 "2020-09-15T02:43:29Z")

Oh, I should have said this before, if anything is out of range for power levels and you have a dedicated AMP, your ISP should be able to adjust accordingly. This should improve both the stability and performance of your internet experience. Even if you have a shared AMP, say in apartment building, there is still some adjustments that the ISP can do to improve things if your SNRs are out of acceptable ranges, it just depend on how many lines you have and how many devices you have on each line. ---

**Author:** ![arcegabriel](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/arcegabriel/32/28485_2.png) [@arcegabriel](https://discourse.nodered.org/u/arcegabriel)\ **Post date:** [15 September 2020 13:53 UTC](https://discourse.nodered.org/t/reset-modem-through-node-red/32778/24 "2020-09-15T13:53:21Z")

Thanks, I only know how to access the web interface of the modem, I am not sure if there are other way. What I can see is what I shared. I can also see system log but seem short and some detail is cut out from the web interface. I will try to find out if there a (hidden) way to extend the info on the web interface One thing I wanted to point out: 1. My house is relatively new in a relatively new residential suburb area (built 2014). I would hope this eliminates certain potential issues related to old infrastructure 2. My ISP is a small one that buys wholesales bandwidth from one of the large ISPs Does this make a difference? Would the discussion with my ISP change (i.e. they may have limited capacity to address an issue?) **System Log** | Time | Priority | Description | | --- | --- | --- | | Tue Sep 15 08:55:07 2020 | Warning (5) | DHCP WARNING - Non-critical field invalid in response ;CM-MAC=BLURRED!;CMTS-MAC=BLURRED2!;CM-QOS=1.1;CM-VER=... | | Tue Sep 15 08:55:12 2020 | Notice (6) | Honoring MDD; IP provisioning mode = IPv4 | | Tue Sep 15 08:55:01 2020 | Critical (3) | No Ranging Response received - T3 time-out;CM-MAC=BLURRED!;CMTS-MAC=BLURRED2!;CM-QOS=1.0;CM-VER=3.0; | | Tue Sep 15 08:54:50 2020 | Critical (3) | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=c4... | | Tue Sep 15 08:54:17 2020 | Critical (3) | Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=BLURRED!;CMTS-MAC=BLURRED2!;... | | Time Not Established | Warning (5) | DHCP WARNING - Non-critical field invalid in response ;CM-MAC=BLURRED!;CMTS-MAC=BLURRED2!;CM-QOS=1.0;CM-VER=... | | Time Not Established | Notice (6) | Honoring MDD; IP provisioning mode = IPv4 | | Sat Sep 12 21:58:05 2020 | Critical (3) | Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=BLURRED!;CMTS-MAC=BLURRED2!;... | | Time Not Established | Critical (3) | No Ranging Response received - T3 time-out;CM-MAC=BLURRED!;CMTS-MAC=BLURRED2!;CM-QOS=1.0;CM-VER=3.0; | ---

**Author:** ![Nodi.Rubrum](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/nodi.rubrum/32/107482_2.png) [@Nodi.Rubrum](https://discourse.nodered.org/u/Nodi.Rubrum)\ **Post date:** [15 September 2020 15:40 UTC](https://discourse.nodered.org/t/reset-modem-through-node-red/32778/25 "2020-09-15T15:40:34Z")

Your log, is pretty much a typical log, ISPs often send control codes/messages, and your modem often reacquire its ip unless you have a static ip, which typically is only done if you host a server or have a business account. You can always request a static ip for extra $$$ with most ISPs. The log information you showed here, does not show a reset or reboot, which is good, you don't want resets or reboots that are not scheduled, or expected. Infrastructure issues can happen at anytime, typically water damage is common on the truck lines between your local hub and your house being typically underground. I have had to have my trunk line replaced very few years, even through I live out in the desert, the problem out here is heat, wires have memory, meaning they don't like to be flexed, or move once set in place, every time a trunk line is moved, pushed, etc. say when new lines are pulled or added to the same conduit, it can impact the quality of the physical cable you are using. Now if you can find in your model setup, where the codeword statistics are, we would have the full picture of what you have to work with. A lot of uncorrectable and/or correctable codewords, adding up over a short period of time is an indicator of several possible issues. Your ISP is just a VAR (value added reseller), so all technical support comes from the parent ISP right? ---

**Author:** ![arcegabriel](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/arcegabriel/32/28485_2.png) [@arcegabriel](https://discourse.nodered.org/u/arcegabriel)\ **Post date:** [15 September 2020 19:16 UTC](https://discourse.nodered.org/t/reset-modem-through-node-red/32778/26 "2020-09-15T19:16:17Z")

My ISP (Carrytel) is not a pure reseller. Below describe their technical model even though is for a different ISP. In my case, my house came wired by Rogers (a large player) and I got their service for a year. With carrytel, I believe they "reuse" (pay?) to use the last mile getting to my home. Carrytel then connect to their backbone infrastructure and to the internet. **TekSavvy Solutions Inc.** is a Canadian residential, business, and wholesale [telecommunications](https://en.wikipedia.org/wiki/Telecommunications) company based in [Chatham](https://en.wikipedia.org/wiki/Chatham-Kent), [Ontario](https://en.wikipedia.org/wiki/Ontario). In most of the country, it is a wholesale-network-access-based service provider and voice [reseller](https://en.wikipedia.org/wiki/Reseller), connecting its service to existing [last mile](https://en.wikipedia.org/wiki/Last_mile) networks from telecom carriers [Bell Canada](https://en.wikipedia.org/wiki/Bell_Canada) (including [Bell Aliant](https://en.wikipedia.org/wiki/Bell_Aliant)) and [Telus Communications](https://en.wikipedia.org/wiki/Telus), and cable carriers [Rogers Communications](https://en.wikipedia.org/wiki/Rogers_Communications), [Cogeco Cable](https://en.wikipedia.org/wiki/Cogeco), [Shaw](https://en.wikipedia.org/wiki/Shaw_Communications) and [Vidéotron](https://en.wikipedia.org/wiki/Vid%C3%A9otron). However, in parts of rural southwestern Ontario, the service is provided over TekSavvy's own fixed wireless network (branded as "Sky Fi"). ---

**Author:** ![arcegabriel](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/arcegabriel/32/28485_2.png) [@arcegabriel](https://discourse.nodered.org/u/arcegabriel)\ **Post date:** [15 September 2020 22:01 UTC](https://discourse.nodered.org/t/reset-modem-through-node-red/32778/27 "2020-09-15T22:01:50Z")

Sadly, based on a quick research sounds like my modem doesnt log codewords... [https://www.amazon.com/review/R1G0O8LGRWNOS8/ref=cm\_cr\_srp\_d\_rdp\_perm](https://www.amazon.com/review/R1G0O8LGRWNOS8/ref=cm_cr_srp_d_rdp_perm) ---

**Author:** ![Nodi.Rubrum](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/nodi.rubrum/32/107482_2.png) [@Nodi.Rubrum](https://discourse.nodered.org/u/Nodi.Rubrum)\ **Post date:** [16 September 2020 03:42 UTC](https://discourse.nodered.org/t/reset-modem-through-node-red/32778/28 "2020-09-16T03:42:25Z")

That is really a shame. You might want to consider replacing it if possible to get such data. It really is key to finding and resolving some of the common issues. ---

**Author:** ![arcegabriel](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/arcegabriel/32/28485_2.png) [@arcegabriel](https://discourse.nodered.org/u/arcegabriel)\ **Post date:** [16 September 2020 13:29 UTC](https://discourse.nodered.org/t/reset-modem-through-node-red/32778/29 "2020-09-16T13:29:20Z")

Thanks, not sure if I will be replacing the modem any time soon. I purchased it around 18 months ago and only used 6 months (other ISP didn't let me bring my modem) Today, I had a terrible ping time to google 20ms - 700ms With regards to how to temporary correct the problem (through intervention on my local equipment) I can confirm that power cycle the ROUTER did not make a different A reboot (through menu) of the MODEM brought the ping to 13-18ms which is expected / good for me ---

**Author:** ![Nodi.Rubrum](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/nodi.rubrum/32/107482_2.png) [@Nodi.Rubrum](https://discourse.nodered.org/u/Nodi.Rubrum)\ **Post date:** [17 September 2020 06:20 UTC](https://discourse.nodered.org/t/reset-modem-through-node-red/32778/30 "2020-09-17T06:20:58Z")

Reboot of the cable modem does several things, first, it forces the channels to reinitialize, so if you are lucky you get channels that are open/least used. Reboot of the cable modem also forces a DHCP release and request (unless you have a static IP assignment), this alone is not a big deal, but it does kill any existing session traffic. So you ping maybe faster, ONLY because you ping before all other traffic is coming and going again. Do you have anyone else in the home streaming or using internet access? Remember your router and cable modem are a shared device with limited resources. Just an idea, but when you run a speed test, is the test results consistent or faster or slower at different times of the day? Cable (COAX) is bus network design, so any other customer on the same trunk line as you, is sharing available bandwidth. I wrote a python script, and am converting it to an NR flow that does a speed check about every 15 minutes, and if I get a result that is out of the acceptable range, I get an email alert. ---

**Author:** ![arcegabriel](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/arcegabriel/32/28485_2.png) [@arcegabriel](https://discourse.nodered.org/u/arcegabriel)\ **Post date:** [22 September 2020 21:56 UTC](https://discourse.nodered.org/t/reset-modem-through-node-red/32778/31 "2020-09-22T21:56:01Z")

Thanks My external IP address never changes even though I am not paying for that. As for ping, it is not really correlated to other traffic inside my home. Several times, I run into the issue early in the morning when I am the only person up and not doing anything crazy. After reset connection improves significantly and pings get very close 13-15ms (before is between 30-300ms) Speed test work fine regardless the time of day. It is not really a speed issue. Also have a family that happily watches netflix/youtube at other times without a problem. Problem mostly small video/voice artifacts during live calls. In the end: 1. I realized I have to do this most days 2. I don't seem to have a reliable way to detect programatically bad quality 3. It seem a little involved to programatically reset the modem (simulate mouse click). I am busy at work at this requires a larger effort than I anticipated (and outside my expertise) Since it looks it is not bad to do this every day I have setup a smartthings+zigbee switch automation to reset the modem at 4am (PS. it took a couple of tries to get it to work all locally - without internet) Depending how it goes also, I may buy the modem TC4400 that shows uncorrectable codewords and is compatible with local ISPs. (I read somewhere that ISP may remotely disable codewords screen... hopefully not). REALLY, appreciate all your comments about ISP and modem logs. ---

**Author:** ![Nodi.Rubrum](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/nodi.rubrum/32/107482_2.png) [@Nodi.Rubrum](https://discourse.nodered.org/u/Nodi.Rubrum)\ **Post date:** [23 September 2020 04:32 UTC](https://discourse.nodered.org/t/reset-modem-through-node-red/32778/32 "2020-09-23T04:32:51Z")

Well, glad to help as I could. I still would encourage you to push your ISP to solve the issue, IMHO, this would be best. My setup, I have a 30 second delay circuit, between power down and power up events. So as long as I have an authenticated power down via my smart plug, the power up is guaranteed. Sneaky but works. But like you, I had to find a way to avoid external authentication. Smart plugs that have a count down timer, make this scenario easy to do. 🙂 As for the streaming, NetFlix, etc. The nature of the transport protocol for video playback does (usually) sufficient buffering that modem temporary drop outs may never be noticed. For example, when I am streaming from various services like NetFlix, I can power down my router/modem for several minutes, and video playback is fine. This is by design to provide consistent viewing experience because the actual transport via the internet is highly random in performance end to end. ---

**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\ **Post date:** [22 November 2020 04:32 UTC](https://discourse.nodered.org/t/reset-modem-through-node-red/32778/33 "2020-11-22T04:32:51Z")

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