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Forum Discussion
CM1000 not getting Gigabit speed with Xfinity
The Xfinity tech showed upwards of 1 Gig from the wall but I can't get a gig connected directly to the CM1000 modem. Please help.
What speed are you getting?
What device are you testing on?
What website are you using for test? (if its speedtest.com, try several of their servers, they don't always pick one that can max out the speed). Try speedtest.xfinity.com
I am having similar issues. I recently upgraded to gig speed through comcast. The engineer came and tested with his equipment and he was getting gig speed whereas I was not able to through my CM1000.
The version of Firmware is V7.01.01
The connection says Good
Frequency start Value This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect. Starting Frequency <tabindex=-1>Startup Procedure</tabindex=-1>
Procedure Status Comment Acquire Downstream Channel 651000000 Hz Locked Connectivity State OK Operational Boot State OK Operational Security Enable BPI+ IP Provisioning Mode Honor MDD IPv6 only <tabindex=-1>Downstream Bonded Channels</tabindex=-1>
Channel Lock Status Modulation Channel ID Frequency Power SNR / MER Unerrored Codewords Correctable Codewords Uncorrectable Codewords 1 Locked QAM256 37 651000000 Hz 3.5 dBmV 39.7 dB 35383176 0 0 2 Locked QAM256 10 483000000 Hz 4.4 dBmV 41.6 dB 34227231 0 0 3 Locked QAM256 11 489000000 Hz 4.6 dBmV 41.6 dB 34230641 0 0 4 Locked QAM256 12 495000000 Hz 4.7 dBmV 41.6 dB 34234480 0 0 5 Locked QAM256 13 507000000 Hz 5.6 dBmV 41.8 dB 34238224 0 0 6 Locked QAM256 14 513000000 Hz 6.0 dBmV 41.8 dB 34242485 0 0 7 Locked QAM256 15 519000000 Hz 6.6 dBmV 42.0 dB 34245954 0 0 8 Locked QAM256 16 525000000 Hz 7.0 dBmV 41.9 dB 34249929 0 0 9 Locked QAM256 17 531000000 Hz 7.5 dBmV 42.0 dB 34253520 0 0 10 Locked QAM256 18 537000000 Hz 8.1 dBmV 41.9 dB 34257380 0 0 11 Locked QAM256 19 543000000 Hz 8.4 dBmV 41.9 dB 34260139 0 0 12 Locked QAM256 20 549000000 Hz 8.6 dBmV 42.0 dB 34264724 0 0 13 Locked QAM256 21 555000000 Hz 8.3 dBmV 41.6 dB 34268838 0 0 14 Locked QAM256 22 561000000 Hz 7.7 dBmV 41.6 dB 34272310 0 0 15 Locked QAM256 23 567000000 Hz 7.0 dBmV 41.5 dB 34275633 0 0 16 Locked QAM256 24 573000000 Hz 6.3 dBmV 41.5 dB 34279322 0 0 17 Locked QAM256 25 579000000 Hz 5.8 dBmV 41.5 dB 34286435 0 0 18 Locked QAM256 26 585000000 Hz 5.2 dBmV 41.2 dB 34289971 0 0 19 Locked QAM256 27 591000000 Hz 4.8 dBmV 41.2 dB 34293616 0 0 20 Locked QAM256 28 597000000 Hz 4.5 dBmV 41.2 dB 34297375 0 0 21 Locked QAM256 29 603000000 Hz 4.3 dBmV 40.8 dB 34301046 0 0 22 Locked QAM256 30 609000000 Hz 3.9 dBmV 40.7 dB 34304945 0 0 23 Locked QAM256 31 615000000 Hz 3.7 dBmV 40.5 dB 34308735 0 0 24 Locked QAM256 32 621000000 Hz 3.8 dBmV 40.6 dB 34312095 0 0 25 Locked QAM256 33 627000000 Hz 3.8 dBmV 40.5 dB 34316098 0 0 26 Locked QAM256 34 633000000 Hz 3.8 dBmV 40.3 dB 34319935 0 0 27 Locked QAM256 35 639000000 Hz 3.6 dBmV 39.9 dB 34323590 0 0 28 Locked QAM256 36 645000000 Hz 3.4 dBmV 39.8 dB 34326994 0 0 29 Locked QAM256 38 657000000 Hz 3.6 dBmV 39.9 dB 34330852 0 0 30 Locked QAM256 39 663000000 Hz 3.8 dBmV 40.1 dB 34332078 0 0 31 Locked QAM256 40 669000000 Hz 3.7 dBmV 40.3 dB 34332913 0 0 32 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 0 <tabindex=-1>Upstream Bonded Channels</tabindex=-1>
Channel Lock Status Modulation Channel ID Frequency Power 1 Locked ATDMA 1 35600000 Hz 43.0 dBmV 2 Locked ATDMA 2 29200000 Hz 43.0 dBmV 3 Locked ATDMA 3 22800000 Hz 42.3 dBmV 4 Locked ATDMA 4 16400000 Hz 40.8 dBmV 5 Locked ATDMA 9 40400000 Hz 41.3 dBmV 6 Not Locked Unknown 0 0 Hz 0.0 dBmV 7 Not Locked Unknown 0 0 Hz 0.0 dBmV 8 Not Locked Unknown 0 0 Hz 0.0 dBmV <tabindex=-1>Downstream OFDM Channels</tabindex=-1>
Channel Lock Status Modulation / Profile ID Channel ID Frequency Power SNR / MER Active Subcarrier Number Range Unerrored Codewords Correctable Codewords Uncorrectable Codewords 1 Locked 0, 1, 2, 3 41 722000000 Hz 4.5 dBmV 39.3 dB 1228 ~ 2867 8573472 2928532 0 2 Not Locked 0 0 0 Hz 4.8 dBmV 0.0 dB 0 ~ 4095 0 0 0 <tabindex=-1>Upstream OFDMA Channels</tabindex=-1>
Channel Lock Status Modulation / Profile ID Channel ID Frequency Power 1 Not Locked Unknown 0 0 Hz 0 dBmV 2 Not Locked Unknown 0 0 Hz 0 dBmV Current System Time: Sun Oct 18 20:23:53 2020 System Up Time: 0:13:19
The event logs have the following issues
Time Priority Description 2020-10-18, 20:11:17 Notice (6) DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=a0:04:60:fc:4f:50;CMTS-MAC=00:01:5c:b2:02:92;CM-QOS=1.1;CM-VER=3.1; Time Not Established Notice (6) Honoring MDD; IP provisioning mode = IPv6 Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=a0:04:60:fc:4f:50;CMTS-MAC=00:01:5c:b2:02:92;CM-QOS=1.1;CM-VER=3.1; Time Not Established Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=a0:04:60:fc:4f:50;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=a0:04:60:fc:4f:50;CMTS-MAC=00:01:5c:b2:02:92;CM-QOS=1.1;CM-VER=3.1; Time Not Established Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=a0:04:60:fc:4f:50;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; Time Not Established Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=a0:04:60:fc:4f:50;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Can someone help explain what the issue is with me not getting Gig speeds. I max out at 230 to 250 mpbs.
Please HELP.
I tested directly hardwired through a laptop to my modem.
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 them back ON.Factory reset the modem as well.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Modems/m-p/1530376#M12853Furrye38,
The ISP provider in this case Comcast came home yesterday and checked the quality of the signal coming inside the home. The was able to remove some issues with some interference and was able to demonstrate through his equipment that the signal was strong and he was gettting more than 1 gig connection for download.
And he connected the modem directly to the incoming RG6 Coax. While debugging by connecting my laptop directly to the modem ethernet out I also did the following
(a) I rebooted the modem several times and tried the connection
(b) Factory reset
(c) Each time waited a few mins (powered off, removed the coax connection, removed power input)
Both did not solve the issue.
I had asked the ISP to reprovision the modem before the Tech came in yesterday and that was not successful either. The only thing I have not done is to as them to reprovision after the tech came to visit. I will try that today and repost and see if it that makes a difference.
Would love for someone more knowledgeable than me to look at the settings I posted and logs and see if there is something they see glaring that I might be able to work with Comcast to fix.
Thanks again to everyone who is helping me resolve this !
