01-05-2017
10:32 PM
- last edited on
09-23-2017
06:53 PM
by
RogersTony
Hi -- I recently signed up for an ignite 250mpbs internet package after being with TekSavvy for years. I am experiencing intermittment disconnects -- usually once a day in the evenings, and they are usually resolved with a modem reboot. The DOCSIS log fills with "No Ranging Response received - T3." Other then these outages, the service seems to run well and I am getting farily consistent 250mpbs speed. The signal levels seem fine when it's working, but I have yet to caputre some when it goes down.
I live in a house, downtown toronto. 100+ years old, mess of wires and cables running from poles in the backyards of the street. Based on reading here it looks like this could be a cabling issue? Any advice in the steps needed to get a ticket and/or tech out if necessary? My attempt at rogers support just has techs telling me to reboot the modem.
Any advice apprecited -- thanks!
Solved! Solved! Go to Solution.
01-05-2017
10:38 PM
- last edited on
09-23-2017
06:53 PM
by
RogersTony
Can you log into the modem, navigate to the DOCSIS WAN page, copy the downstream and upstream tables and paste them into a thread. Just the tables, and none of the data above the downstream table which includes the MAC Address. The copy and paste process will paste in the text contents into the post. Those are the downstream and upstream signal levels which will be of interest at the present time.
01-05-2017
10:42 PM
- last edited on
09-23-2017
06:54 PM
by
RogersTony
Thanks. Here's what it looks like now (net working fine). I will try and grab one the next time the connection drops.
Downstream Overview
Port ID | Frequency (MHz) | Modulation | Signal strength (dBmV) | Channel ID | Signal noise ratio (dB) |
1 | 633000000 | 256QAM | -7.200 | 37 | 38.605 |
2 | 621000000 | 256QAM | -5.600 | 36 | 38.983 |
3 | 639000000 | 256QAM | -7.100 | 38 | 38.605 |
4 | 645000000 | 256QAM | -6.400 | 39 | 38.983 |
5 | 651000000 | 256QAM | -6.700 | 40 | 37.356 |
6 | 657000000 | 256QAM | -8.300 | 41 | 37.356 |
7 | 663000000 | 256QAM | -8.500 | 42 | 37.356 |
8 | 669000000 | 256QAM | -7.400 | 43 | 37.636 |
9 | 675000000 | 256QAM | -7.100 | 44 | 38.605 |
10 | 681000000 | 256QAM | -7.100 | 45 | 38.983 |
11 | 687000000 | 256QAM | -8.000 | 46 | 37.636 |
12 | 693000000 | 256QAM | -7.400 | 47 | 38.605 |
13 | 699000000 | 256QAM | -5.800 | 48 | 38.983 |
14 | 705000000 | 256QAM | -6.700 | 49 | 38.983 |
15 | 711000000 | 256QAM | -8.000 | 50 | 37.636 |
16 | 717000000 | 256QAM | -8.500 | 51 | 37.636 |
17 | 723000000 | 256QAM | -7.900 | 52 | 38.605 |
18 | 825000000 | 256QAM | -10.800 | 53 | 37.636 |
19 | 831000000 | 256QAM | -11.700 | 54 | 36.387 |
20 | 837000000 | 256QAM | -12.400 | 55 | 36.387 |
21 | 843000000 | 256QAM | -11.900 | 56 | 36.387 |
22 | 849000000 | 256QAM | -11.400 | 57 | 36.387 |
23 | 855000000 | 256QAM | -13.000 | 58 | 35.780 |
24 | 861000000 | 256QAM | -13.300 | 59 | 35.084 |
Port ID | Frequency (MHz) | Modulation | Signal strength (dBmV) | Channel ID | BandWidth |
1 | 38596000 | ATDMA - 64QAM | 52.500 | 6 | 3200000 |
2 | 30596000 | ATDMA - 64QAM | 52.250 | 4 | 6400000 |
3 | 10000154 | ATDMA - 64QAM | 50.250 | --- | 6400000 |
01-05-2017
10:47 PM
- last edited on
09-23-2017
06:54 PM
by
RogersTony
@jerkbag you have serious signal issues on the go. Call tech support and advise the CSR that you have signal levels on the downstream side that are below -10 dBmV and that you only have two upstream channels running instead of three. Ask the CSR to run a signal check on the modem. That check should fail automatically and the next discussion should be about getting a tech to your home at your convenience.
If you have any problems with tech support, please let us know. This should be a straight forward conversation: Bad signal levels --- need tech. End of discussion.
Please let us know what occurs.
01-06-2017
10:08 AM
- last edited on
09-23-2017
06:54 PM
by
RogersTony
Thanks for you help -- I guess I can't read those signal levels as well as I thought I could
I called Rogers just now and they did a test and are sending out a tech.
Thanks!
01-06-2017
04:34 PM
- last edited on
09-23-2017
06:53 PM
by
RogersTony
Update -- tech came by today, and traced the problem to an ancient looking rusty splitter inside the locked rogers box outside the house. There was a strong signal coming into the box, and removing the splitter put everything in back in spec.
Thanks for the help here, and to rogers for a quick solution!
01-06-2017
05:01 PM
- last edited on
09-23-2017
06:52 PM
by
RogersTony
01-06-2017
05:05 PM
- last edited on
09-23-2017
06:51 PM
by
RogersTony
sure -- new and improved below
Port ID | Frequency (MHz) | Modulation | Signal strength (dBmV) | Channel ID | Signal noise ratio (dB) |
1 | 621000000 | 256QAM | -2.300 | 36 | 40.366 |
2 | 615000000 | 256QAM | -2.100 | 35 | 38.605 |
3 | 633000000 | 256QAM | -3.900 | 37 | 38.605 |
4 | 639000000 | 256QAM | -3.500 | 38 | 38.605 |
5 | 651000000 | 256QAM | -3.500 | 40 | 37.636 |
6 | 657000000 | 256QAM | -4.700 | 41 | 37.356 |
7 | 663000000 | 256QAM | -4.400 | 42 | 37.636 |
8 | 669000000 | 256QAM | -3.700 | 43 | 38.605 |
9 | 675000000 | 256QAM | -3.800 | 44 | 38.605 |
10 | 681000000 | 256QAM | -3.400 | 45 | 38.983 |
11 | 687000000 | 256QAM | -3.900 | 46 | 38.605 |
12 | 693000000 | 256QAM | -3.500 | 47 | 38.605 |
13 | 699000000 | 256QAM | -2.200 | 48 | 40.366 |
14 | 705000000 | 256QAM | -3.000 | 49 | 38.983 |
15 | 711000000 | 256QAM | -3.900 | 50 | 38.605 |
16 | 717000000 | 256QAM | -4.500 | 51 | 38.983 |
17 | 723000000 | 256QAM | -3.900 | 52 | 38.605 |
18 | 825000000 | 256QAM | -6.800 | 53 | 38.605 |
19 | 831000000 | 256QAM | -7.000 | 54 | 37.636 |
20 | 837000000 | 256QAM | -7.800 | 55 | 37.636 |
21 | 843000000 | 256QAM | -6.800 | 56 | 37.636 |
22 | 849000000 | 256QAM | -7.200 | 57 | 37.356 |
23 | 855000000 | 256QAM | -8.300 | 58 | 37.356 |
24 | 861000000 | 256QAM | -8.500 | 59 | 37.356 |
Port ID | Frequency (MHz) | Modulation | Signal strength (dBmV) | Channel ID | BandWidth |
1 | 30596000 | ATDMA - 64QAM | 36.500 | 4 | 6400000 |
2 | 38595824 | ATDMA - 64QAM | 36.500 | 6 | 3200000 |
3 | 23700000 | ATDMA - 64QAM | 36.500 | 5 | 6400000 |
09-23-2017 06:45 PM - edited 09-23-2017 07:45 PM
Rogers CGN3ACSMR - wifi constantly dropping
About a day or two ago I noticed my WiFi has been constantly dropping. Ethernet is fine. I've tried rebooting the modem countless times but the issue reappears after a few minutes. I've also done a factory reset, but the issue reappeared after a bit. I am not in bridge mode.
Some information:
Downstream/upstream stats:
Any idea what may be causing this? I first noticed it around Thursday night.
Thanks.
09-23-2017 07:42 PM - edited 09-23-2017 07:51 PM
@illiterate can you delete the System Information block please. Its not a good security practice to leave MAC addresses and IP addresses exposed in an open forum. The signal levels can remain.
For the wifi, this might be caused by anything, but, I would suspect that a neighbor may have set up a new modem or router which is competing with your modem for a clear wifi channel. So, can you check/set the following 2.4 Ghz wifi parameters:
Wireless Mode: 802.11 n
Channel Bandwidth: 20/40 Mhz, although, for test purposes you could set this to 20 Mhz. In a crowded wifi environment, I would set this for 20 Mhz. It would most likely default down to 20 Mhz anyway.
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 and will cause the wifi data rates to cap at 54 Mb/s which is the 802.11g rate.
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. I would revert back to 80 Mhz after running a 40 Mhz test.
Wireless channel: 149 to 161
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.
Next 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
In the modem itself, if you have a CODA-4582, there is a wifi Site Survey under ADMIN .... DIAGNOSTICS. Since it uses all three of the 2.4 Ghz antenna and all four of the 5 Ghz antenna, its fairly sensitive compared to a laptop or phone. The user interface isn't great, but, you can copy all of the data in one go and dump it into something like MS Excel, where you can sort it any way you want.
My personal choice is InSSIDer. That's 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 2.4 Ghz band offer the least number of users, and in the 5 Ghz band, what channels in the 149 to 165 range are occupied and if so, which offers the least competition in terms of occupancy or 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.
Ok, have a look at the wifi settings and at the number of users in the 2.4 and 5 Ghz bands and see if your able to find a better channel to use for your own wifi network.