@Davisteraz can you confirm for me that you have a CODA-4582U, not a CODA-4582U 2A? The specific model can be seen on the Serial Number sticker on the back of the modem.
Your DOCSIS 3.0 downstream levels are low, with the usual drop-off after 750 Mhz. The signal to noise ratios are on the borderline at the low end of the range with a few dropping slightly below the normal 36 dB level. However, as your modem is using the DOCSIS 3.1 OFDM channel for Downstream data, the DOCSIS 3.0 levels don't really mean very much other than a broad indication of power levels at various frequencies. That may or may not have any relation to the DOCSIS 3.1 OFDM channel power level, depending on where the OFDM is situated in the range of frequencies. At the present time, the OFDM channel data on the user interface is not accurate, so, to determine if the Downstream OFDM channel is within spec you will have to call Tech Support and ask the tech to check the DOCSIS 3.1 OFDM channel data.
The Upstream channels are running higher than is normal for a modem that is using DOCSIS 3.1 on the downstream side. Typically their around 30 to 32 dBmV. So, still well within spec, just commenting on the fact that your upstream levels are a little higher than normal. If they ever approach 51/52 dBmV, that's an indication of a cable or connector problem. Typically you would see slow data rates as the modem will shut down one channel and then maybe another to use all of the available output power for the last remaining channel. If you're ever there, you will know it.
From a signals perspective, without knowing the power level and signal to noise ratio for the DOCSIS 3.1 OFDM channel, there isn't anything to suggest an issue with the external cable or connectors. That doesn't mean that the cable and connectors are operating perfectly, but that there isn't a continuous problem that can be seen through those signal levels and signal to noise ratios.
If you're using wifi, that can be a problem all of its own. For now, without knowing how crowded your neighborhood is for wifi, do the following:
check/set the following 2.4 Ghz wifi parameters:
Wireless Mode: 802.11 n
Channel Bandwidth: 20/40 Mhz, although, for test puposes you could set this to 20 Mhz. In a crowded wifi environment, I would set this for 20 Mhz.
Wireless channel: AUTO or, to an open channel if one existed, or to the channel that offers the least interference from neighboring routers and modems
WPS Enabled: OFF
Security Mode: WPA-Personal
Auth Mode: WPA2-PSK
Encrypt Mode: AES only
Save the setting and ensure that the Encrypt Mode stays on AES only. If it changes on its own to TKIP/AES, change it back to AES only and save the setting again. TKIP is no longer secure will cap the throughput rates at a maximum of 54 Mb/s as its not compatible with 802.11n.
Check/set the following 5 Ghz wifi parameters:
Wireless Mode: 802.11 a/n/ac mixed
Channel Bandwidth: 80 Mhz, although, for test puposes you could set this to 40 Mhz
Wireless channel: 149 to 165
WPS Enabled: OFF
Security Mode: WPA-Personal
Auth Mode: WPA2-PSK
Encrypt Mode: AES only
Once again, save the setting and ensure that the Encrypt Mode stays on AES only. If it changes on its own to TKIP/AES, change it back to AES only and save the setting again.
Reboot the modem if you had to make any changes, ADMIN ..... DEVICE RESET .... Reboot.
Look at your wifi environment using one of the following applications:
http://www.techspot.com/downloads/5936-inssider.html
https://www.acrylicwifi.com/en/wlan-software/wlan-scanner-acrylic-wifi-free/
http://www.nirsoft.net/utils/wifi_information_view.html
Or,
For IOS
https://itunes.apple.com/us/app/network-analyzer-lite-wifi/id562315041?mt=8
For Android
https://play.google.com/store/apps/details?id=com.farproc.wifi.analyzer&hl=en
Thats the last freebie version of inSSIDer and at this point in time is getting a little old. Its fine for 2.4 Ghz application and does work for 802.11n 5 Ghz networks. It does display 802.11ac networks but not as well as it should. This has become a licenced application now for $20 US and works very well for both frequency bands, 2.4 and 5 Ghz.
The other applications are fine for 802.11ac. Acrylic is graphical, WifiInfoView is text only.
What you want to do is determine what channels in the 149 to 165 range are occupied and if so, which offers the least competition in terms of signal level for any given channel. If you can find a channel or channel range in that group that is not occupied, that will be the best choice. The 2.4 Ghz range will probably be pretty tough to work in. Its usually fully occupied and the end result is that you have to pick the least of worst, so to speak. There's no getting around that for devices that only support 2.4 Ghz. For anything that supports 5 Ghz as well, your best bet is to kick them up to that range.
Ok, have a look at the wifi settings and set the 5 Ghz channel to the best possible choice and see how this turns out.
To signup for the trial firmware if you're interested, send a private message to @CommunityHelps Follow that link to the public page for @CommunityHelps and then select the link on the right hand side to "Send this user a private message" to navigate to the message composition page. It will already be addressed.
Fill in the title: CODA-4582 Modem Firmware Trial
In the text area, add your modems:
MAC Address
Serial Number
Modem Model: CODA-4582U (?)
The first two can be found in the Status page when you log into the modem or on the back of the modem. They can be copied from the Status page and pasted into the message.
When you're logged into the forum, watch for a number overlaid on your avatar at the top right hand corner signifying a response from one of the moderators. Select that link and follow it down to your message inbox. You should see a disclaimer that has to be acknowledged prior to loading the latest version of trial firmware.
Keep an eye open on this thread or the Open Issues thread for any particular requirements for rebooting or running a factory reset on a modem with trial firmware loaded. Usually there are no special instructions, but, that can happen occasionally. For V2.0.10.31, you can reboot or restart the modem after disconnecting the modem power and the modem will remain at V2.0.10.31. If you run a factory reset the modem will revert back to V2.0.10.28T2 which is the current network wide version for the CODA-4582.
Ok, thank you. 🙂
Fwiw, in the modem, there is a Wifi Site Survey under ADMINISTRATION .... DIAGNOSTICS. That is basically the same as any other wifi monitor application, except that it resides on the modem. Since it uses 3 antenna for the 2.4 Ghz band and 4 antenna for the 5 Ghz band, its pretty sensitive compared to a laptop for example. So, you will see more wifi networks running nearby than you would see with a laptop for example. The display isn't great, but, you can copy the entire data set and paste that into something like MS Excel where you can sort the data any way that you want to.
Channels 1, 6 and 11 are the only three channels in the 2.4 Ghz band that don't overlap with each other. Your best bet is to use which ever of those 3 channels has the least number of users on it and the least amount of overlap from adjacent channels. That selected channel will still be timeshared, but, it will be the least affected of the worst. There's no winning with 2.4 Ghz unless you're out in the county with no neighbor for miles in all directions.
In the case of the 5 Ghz channel, if 149 is occupied, set 161 or work down from there, and set 80 Mhz bandwidth. There will be some overlap in the middle, and most likely everyone will end up with 40 Mhz wide channels. C'est la vie, as they say. My immediate neighbors and I are all running in the 149 to 161 range, competing with each other, and despite that, I still see faster wifi rates in the 149 to 161 range compared to running in the unoccupied channel 36 to 48 range with its mandated lower power output.
Hello Community!
I’m currently reviewing feedback on firmware 4.5.8.33 (CGN3AMR, CGN3AMF, CGN3ACSMR, CGNM3552 and CGN3ACR) and realized that there hasn’t been many comments.
I noted on this forum a problem with some Pixel devices disconnecting from the WiFi. We do have a solution for this but as a quick workaround, a one-time factory reset should resolve the issue.
I’d like to get some feedback on stability of the firmware, features, speed, etc. Anything to help us make a decision on the readiness of this firmware for primetime.
Let me know!
Dave
1. What mode are you running your modem bridge or gateway?
Gateway
2. What are your signal levels?
Downstream Overview
| Port ID | Frequency (MHz) | Modulation | Signal strength (dBmV) | Channel ID | Signal noise ratio (dB) |
| 1 | 693000000 | 256QAM | 2.300 | 23 | 38.983 |
| 2 | 561000000 | 256QAM | -0.100 | 2 | 37.636 |
| 3 | 567000000 | 256QAM | -2.200 | 3 | 38.605 |
| 4 | 573000000 | 256QAM | -1.000 | 4 | 38.983 |
| 5 | 579000000 | 256QAM | -0.400 | 5 | 40.366 |
| 6 | 585000000 | 256QAM | -0.700 | 6 | 38.983 |
| 7 | 591000000 | 256QAM | -1.100 | 7 | 38.605 |
| 8 | 597000000 | 256QAM | -1.400 | 8 | 38.983 |
| 9 | 603000000 | 256QAM | -1.200 | 9 | 38.605 |
| 10 | 609000000 | 256QAM | -0.400 | 10 | 38.983 |
| 11 | 615000000 | 256QAM | 0.700 | 11 | 38.605 |
| 12 | 621000000 | 256QAM | 2.000 | 12 | 38.983 |
| 13 | 633000000 | 256QAM | 2.900 | 13 | 40.366 |
| 14 | 639000000 | 256QAM | 1.700 | 14 | 38.983 |
| 15 | 645000000 | 256QAM | 0.500 | 15 | 38.605 |
| 16 | 651000000 | 256QAM | -0.300 | 16 | 38.605 |
| 17 | 657000000 | 256QAM | -0.400 | 17 | 38.605 |
| 18 | 663000000 | 256QAM | -0.400 | 18 | 38.983 |
| 19 | 669000000 | 256QAM | 0.100 | 19 | 38.983 |
| 20 | 675000000 | 256QAM | 0.500 | 20 | 38.605 |
| 21 | 681000000 | 256QAM | 1.000 | 21 | 38.983 |
| 22 | 687000000 | 256QAM | 1.600 | 22 | 38.605 |
| 23 | 555000000 | 256QAM | 1.300 | 1 | 38.983 |
| 24 | 699000000 | 256QAM | 3.600 | 24 | 38.983 |
Upstream Overview
| Port ID | Frequency (MHz) | Modulation | Signal strength (dBmV) | Channel ID | Bandwidth |
| 1 | 23700000 | ATDMA - 64QAM | 42.500 | 2 | 6400000 |
| 2 | 38596000 | ATDMA - 64QAM | 43.750 | 3 | 3200000 |
| 3 | 30596000 | ATDMA - 64QAM | 42.750 | 1 | 6400000 |
3. Are you achieving your speeds per plan?
Ignite 100U
4. Are your issues encountered on WiFi, Wired or Both?
Mostly on wired.
I will probably try a hard reset tomorrow, maybe it's just what it needs to fix everything.
Edited later same evening:
Okay, so I decided to hard reset my modem anyway tonight and what do you know, everything is back to normal (Videos on youtube and netflix play as they should). Something I didn't know, a few weeks back and a couple a days ago, there has been a power failure during the night that lasted only 2 or 3 second, probably what affected my modem.
@aube wrote:I'm on firmware 4.5.8.33 on my CGN3ACSMR. One thing that is causing problems for me is with Youtube and Netflix or other web videos formats, With 4.5.8.27 videos were starting immediately without any problems but now with 4.5.8.33 videos are buffering a lot and at times they freeze for a few minutes before restarting or I need to refresh the page to restart it. I don't know if others are having similar problems but I think the firmware needs more work.
Etienne
One more detail, are you watching these videos on an Android device or on something else?
Dave
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