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Re: Lose Connection Frequently

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Frequent Visitor

Re: Lose Connection Frequently

I am having the same problem. Need help as well
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Expert

Re: Lose Connection Frequently

Start here;


https://forums.xfinity.com/t5/Your-Home-Network/Internet-Troubleshooting-Tips/m-p/3310447#M316652



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Re: Lose Connection Frequently

None of the tips helped. Only changes made were I upgraded from an 6141/250mbps plan to an SB8200/600mbps plan. Since then random rebooting of modem every couple hours.

The status listed show the connection state of the cable modem. They are used by your service provider to evaluate the operation of the cable modem.
Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 651000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Configuration File OK
Security Enabled BPI+
DOCSIS Network Access Enabled Allowed

Downstream Bonded Channels
Channel ID Lock Status Modulation Frequency Power SNR/MER Corrected Uncorrectables
29 Locked QAM256 651000000 Hz 0.1 dBmV 38.6 dB 0 0
1 Locked QAM256 477000000 Hz 0.2 dBmV 40.0 dB 0 0
2 Locked QAM256 483000000 Hz 0.2 dBmV 40.0 dB 0 0
3 Locked QAM256 489000000 Hz 0.6 dBmV 40.0 dB 0 0
4 Locked QAM256 495000000 Hz 0.8 dBmV 39.2 dB 0 0
5 Locked QAM256 507000000 Hz 1.2 dBmV 39.8 dB 0 0
6 Locked QAM256 513000000 Hz 1.1 dBmV 39.7 dB 0 0
7 Locked QAM256 519000000 Hz 1.1 dBmV 39.7 dB 0 0
8 Locked QAM256 525000000 Hz 1.2 dBmV 39.6 dB 0 0
9 Locked QAM256 531000000 Hz 1.2 dBmV 39.7 dB 0 0
10 Locked QAM256 537000000 Hz 1.3 dBmV 39.5 dB 0 0
11 Locked QAM256 543000000 Hz 1.2 dBmV 39.4 dB 0 0
12 Locked QAM256 549000000 Hz 1.3 dBmV 39.4 dB 0 0
13 Locked QAM256 555000000 Hz 1.4 dBmV 39.3 dB 0 0
14 Locked QAM256 561000000 Hz 1.5 dBmV 39.3 dB 0 0
15 Locked QAM256 567000000 Hz 1.7 dBmV 39.3 dB 0 0
16 Locked QAM256 573000000 Hz 1.8 dBmV 39.3 dB 0 0
17 Locked QAM256 579000000 Hz 1.9 dBmV 39.2 dB 0 0
18 Locked QAM256 585000000 Hz 2.1 dBmV 39.4 dB 0 0
19 Locked QAM256 591000000 Hz 2.1 dBmV 39.4 dB 0 0
20 Locked QAM256 597000000 Hz 2.4 dBmV 39.4 dB 0 0
21 Locked QAM256 603000000 Hz 2.3 dBmV 39.3 dB 1 0
22 Locked QAM256 609000000 Hz 1.9 dBmV 39.1 dB 0 0
23 Locked QAM256 615000000 Hz 1.7 dBmV 39.2 dB 0 0
24 Locked QAM256 621000000 Hz 1.3 dBmV 39.0 dB 0 0
25 Locked QAM256 627000000 Hz 1.1 dBmV 39.0 dB 0 0
26 Locked QAM256 633000000 Hz 0.8 dBmV 38.7 dB 0 0
27 Locked QAM256 639000000 Hz 0.4 dBmV 38.8 dB 0 0
28 Locked QAM256 645000000 Hz 0.3 dBmV 38.7 dB 0 0
30 Locked QAM256 657000000 Hz 0.1 dBmV 38.6 dB 1 0
31 Locked QAM256 663000000 Hz 0.1 dBmV 38.7 dB 0 0
159 Locked Other 702000000 Hz 2.6 dBmV 37.8 dB 3543941629 0



Upstream Bonded Channels
Channel Channel ID Lock Status US Channel Type Frequency Width Power
1 1 Locked SC-QAM Upstream 36500000 Hz 6400000 Hz 43.0 dBmV
2 2 Locked SC-QAM Upstream 30100000 Hz 6400000 Hz 44.0 dBmV
3 3 Locked SC-QAM Upstream 23700000 Hz 6400000 Hz 44.0 dBmV
4 4 Locked SC-QAM Upstream 17300000 Hz 6400000 Hz 45.0 dBmV



Current System Time: Thu Apr 9 14:37:30 2020


Event Log
The table below contains the log of events that the SB8200 has detected. This log can be important to the service provider to help diagnose and correct problems, if any should occur.
Date Time Event ID Event Level Description
04/09/2020 03:45 84000500 3 "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 2436694066 6 "Honoring MDD; IP provisioning mode = IPv6"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
04/08/2020 01:05 82000600 3 "Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/08/2020 01:05 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/08/2020 01:05 82000600 3 "Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/08/2020 01:05 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/08/2020 01:05 82000600 3 "Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/08/2020 01:05 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/08/2020 01:05 82000600 3 "Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/08/2020 01:05 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/08/2020 01:05 84000500 3 "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/08/2020 00:53 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:10 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:09 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:09 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:09 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:08 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:06 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:04 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:02 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:01 68001202 3 "DHCP failed - DHCP Solicit sent, No DHCP Advertise received;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
04/07/2020 20:52 82000600 3 "Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/07/2020 20:52 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/07/2020 20:52 82000600 3 "Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/07/2020 20:52 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/07/2020 20:52 82000600 3 "Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/07/2020 20:52 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/07/2020 20:52 82000600 3 "Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/07/2020 20:52 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/07/2020 20:52 84000500 3 "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
04/07/2020 20:38 2436694044 3 "Resetting the cable modem due to docsDevResetNow"
04/04/2020 22:52 82000600 3 "Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/04/2020 22:52 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/04/2020 22:51 82000600 3 "Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/04/2020 22:51 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/04/2020 22:51 82000600 3 "Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/04/2020 22:51 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/04/2020 22:51 82000600 3 "Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/04/2020 22:51 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/04/2020 22:51 84000500 3 "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
04/04/2020 22:38 2436694044 3 "Resetting the cable modem due to docsDevResetNow"
04/04/2020 22:08 82000600 3 "Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/04/2020 22:08 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/04/2020 22:08 82000600 3 "Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
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Expert

Re: Lose Connection Frequently

The signal stats are o/k but the error log entries indicate that something is going on. Perhaps there is noise ingress into the line(s) somewhere.

 

There are other signal stat figures that can't be read by the modem. They are the "Upstream Rx Power" (Upstream Receive Power Level), the "Upstream SNR Ch." (Upstream Signal To Noise Ratio), and the "Upstream ICFR" (In Channel Frequency Response). These are as equally important in diagnosing connectivity issues as are the modem's stats.

 

I'm going to escalate your issue to the Comcast corporate employees that are available to these boards. They will be able to poll the CMTS to see whether or not everything is in the green zone, see your node / cable plant and modem health, and also see a history plot for the modem. You should get a reply here in your topic. Good luck !



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I am a Customer Expert volunteering my time to help other customers here in the Forums.
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Frequent Visitor

Re: Lose Connection Frequently

Thank you so much!
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Expert

Re: Lose Connection Frequently


@Mr781drama wrote:
Thank you so much!

Quite welcome !



I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark the post as Best Answer!
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Official Employee

Re: Lose Connection Frequently

Hello, Mr781drama! 

I'm so happy that you reached out to us here for help. I know how important it is to have a stable internet connection, especially right now. I would love to work with you and see if we can improve your service together! Please send me a private message with your first and last name, as well as your service address so I can assist. 

 

 To send a private message, click my name "ComcastTambrey", then click "send a message".


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Frequent Visitor

Re: Lose Connection Frequently

My connection had been having more disconnects with different errors. I need help ASAP.

Event Log
The table below contains the log of events that the SB8200 has detected. This log can be important to the service provider to help diagnose and correct problems, if any should occur.
Date Time Event ID Event Level Description
04/13/2020 16:14 84000500 3 "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/13/2020 16:02 2436694061 5 "Dynamic Range Window violation"
04/13/2020 16:02 82001100 5 "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/13/2020 16:02 2436694061 5 "Dynamic Range Window violation"
04/13/2020 16:02 82001100 5 "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 2436694066 6 "Honoring MDD; IP provisioning mode = IPv6"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
04/13/2020 16:00 2436694044 3 "Resetting the cable modem due to docsDevResetNow"
04/11/2020 20:23 84000500 3 "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
04/11/2020 20:09 2436694044 3 "Resetting the cable modem due to docsDevResetNow"
04/09/2020 03:45 84000500 3 "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
04/08/2020 01:05 82000600 3 "Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/08/2020 01:05 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/08/2020 01:05 82000600 3 "Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/08/2020 01:05 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/08/2020 01:05 82000600 3 "Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/08/2020 01:05 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/08/2020 01:05 82000600 3 "Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/08/2020 01:05 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/08/2020 01:05 84000500 3 "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/08/2020 00:53 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:10 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:09 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:09 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:09 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:08 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:06 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:04 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:02 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:01 68001202 3 "DHCP failed - DHCP Solicit sent, No DHCP Advertise received;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
04/07/2020 20:52 82000600 3 "Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/07/2020 20:52 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/07/2020 20:52 82000600 3 "Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/07/2020 20:52 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/07/2020 20:52 82000600 3 "Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/07/2020 20:52 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/07/2020 20:52 82000600 3 "Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/07/2020 20:52 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/07/2020 20:52 84000500 3 "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
04/07/2020 20:38 2436694044 3 "Resetting the cable modem due to docsDevResetNow"
04/04/2020 22:52 82000600 3 "Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/04/2020 22:52 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/04/2020 22:51 82000600 3 "Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/04/2020 22:51 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
04/04/2020 22:51 82000600 3 "Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=2c:58:4f:ff:19:b5;CMTS-MAC=dc:eb:94:b4:b9:5d;CM-QOS=1.1;CM-VER=3.1;"
Highlighted
Expert

Re: Lose Connection Frequently

You need to also post the *Downstream Power Level*, the *Upstream Power Level*, and the *SNR* (Signal to Noise Ratio) numbers.

What is the exact make and model number of the modem ?

Is this a WiFi connection ?



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Frequent Visitor

Re: Lose Connection Frequently

I am using a sb8200. The only wired thing on my network is my Xbox one. Everything is wireless.

ARRIS Logo
STATUS
PRODUCT INFORMATION
EVENT LOG
ADDRESSES
CONFIGURATION
ADVANCED
HELP
Connection
The status listed show the connection state of the cable modem. They are used by your service provider to evaluate the operation of the cable modem.
Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 651000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Configuration File OK
Security Enabled BPI+
DOCSIS Network Access Enabled Allowed

Downstream Bonded Channels
Channel ID Lock Status Modulation Frequency Power SNR/MER Corrected Uncorrectables
29 Locked QAM256 651000000 Hz 1.7 dBmV 39.0 dB 0 0
1 Locked QAM256 477000000 Hz 1.4 dBmV 40.3 dB 0 0
2 Locked QAM256 483000000 Hz 1.5 dBmV 40.1 dB 0 0
3 Locked QAM256 489000000 Hz 1.9 dBmV 40.2 dB 0 0
4 Locked QAM256 495000000 Hz 2.0 dBmV 40.1 dB 0 0
5 Locked QAM256 507000000 Hz 2.5 dBmV 40.0 dB 0 0
6 Locked QAM256 513000000 Hz 2.4 dBmV 40.0 dB 0 0
7 Locked QAM256 519000000 Hz 2.4 dBmV 39.9 dB 0 0
8 Locked QAM256 525000000 Hz 2.5 dBmV 40.0 dB 0 0
9 Locked QAM256 531000000 Hz 2.5 dBmV 39.9 dB 0 0
10 Locked QAM256 537000000 Hz 2.6 dBmV 39.9 dB 0 0
11 Locked QAM256 543000000 Hz 2.5 dBmV 39.6 dB 0 0
12 Locked QAM256 549000000 Hz 2.6 dBmV 39.7 dB 0 0
13 Locked QAM256 555000000 Hz 2.7 dBmV 39.7 dB 0 0
14 Locked QAM256 561000000 Hz 2.8 dBmV 39.6 dB 0 0
15 Locked QAM256 567000000 Hz 3.0 dBmV 39.8 dB 0 0
16 Locked QAM256 573000000 Hz 3.2 dBmV 39.5 dB 0 0
17 Locked QAM256 579000000 Hz 3.3 dBmV 39.7 dB 0 0
18 Locked QAM256 585000000 Hz 3.5 dBmV 39.8 dB 0 0
19 Locked QAM256 591000000 Hz 3.6 dBmV 39.7 dB 0 0
20 Locked QAM256 597000000 Hz 3.8 dBmV 39.8 dB 0 0
21 Locked QAM256 603000000 Hz 3.8 dBmV 39.6 dB 0 0
22 Locked QAM256 609000000 Hz 3.3 dBmV 39.5 dB 0 0
23 Locked QAM256 615000000 Hz 3.1 dBmV 39.4 dB 0 0
24 Locked QAM256 621000000 Hz 2.8 dBmV 39.3 dB 0 0
25 Locked QAM256 627000000 Hz 2.6 dBmV 39.2 dB 0 0
26 Locked QAM256 633000000 Hz 2.3 dBmV 39.1 dB 0 0
27 Locked QAM256 639000000 Hz 1.9 dBmV 38.9 dB 0 0
28 Locked QAM256 645000000 Hz 1.9 dBmV 38.9 dB 0 0
30 Locked QAM256 657000000 Hz 1.6 dBmV 39.0 dB 0 0
31 Locked QAM256 663000000 Hz 1.7 dBmV 39.0 dB 0 0
159 Locked Other 702000000 Hz 4.3 dBmV 38.0 dB 5387443 0



Upstream Bonded Channels
Channel Channel ID Lock Status US Channel Type Frequency Width Power
1 1 Locked SC-QAM Upstream 36500000 Hz 6400000 Hz 43.0 dBmV
2 2 Locked SC-QAM Upstream 30100000 Hz 6400000 Hz 44.0 dBmV
3 3 Locked SC-QAM Upstream 23700000 Hz 6400000 Hz 44.0 dBmV
4 4 Locked SC-QAM Upstream 17300000 Hz 6400000 Hz 45.0 dBmV



Current System Time: Tue Apr 14 13:15:53 2020
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Expert

Re: Lose Connection Frequently

The stats are o/k. When the connection goes down does the hardwired Xbox one also go down or is it just the WiFi devices ?



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Frequent Visitor

Re: Lose Connection Frequently

Ok I just noticed the date and time of the reboots. And I realized the docsdevreset is me rebooting with the xfinity app. Google had me restart to try to get my nest thermostat working. So the t3 reboots are my main concern
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Frequent Visitor

Re: Lose Connection Frequently

And yes the wired Xbox loses connection. That’s all I play and when I get kicked out of a game I run straight to the modem and router. And the modem will be restarting
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Expert

Re: Lose Connection Frequently

I'm going to re-escalate this.



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Frequent Visitor

Re: Lose Connection Frequently

I pm the guy my info but he never got back to me
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Expert

Re: Lose Connection Frequently

O/k.



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Official Employee

Re: Lose Connection Frequently

Hello again, Mr781drama!
I just wanted to drop by here in your thread quickly to let you know I did get your PM over my weekend and have replied. I look forward to your response!

For anyone reading who may be curious about the current situation, it looks like we have already scheduled repairs for the area that may fix the issues Mr781drama is having. I'll be sure to leave updates here as well just in case! 🙂


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Frequent Visitor

Re: Lose Connection Frequently

Thank you so much. My last question, in my inbox I can’t see the full message. It has 3 dots at the end of last line but can not click them. If I turn phone sideways it shows a few more lines, but still not the full message.