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SB8200 Connectivity Problems

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SB8200 Connectivity Problems

Several months ago i started having connectivity issues. The connection would drop out and i would have to restart my cable modem to get internet back. After several phone calls with comcast and several tech visits they determined that my modem was bad. I contacted arris and had them replace my sb8200. After the replacement everything worked fine for about a month and then it started dropping every few days to now where its dropping multiple times a day. They keep telling me everything is fine but im sure at this point it has to be a something else besides the modem. My logs are below.

 

 SB8200
Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 573000000 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
17 Locked QAM256 573000000 Hz -2.8 dBmV 38.2 dB 0 0
1 Locked QAM256 477000000 Hz -0.8 dBmV 40.7 dB 0 0
2 Locked QAM256 483000000 Hz -1.0 dBmV 40.2 dB 0 0
3 Locked QAM256 489000000 Hz -1.4 dBmV 40.2 dB 0 0
4 Locked QAM256 495000000 Hz -1.0 dBmV 40.1 dB 0 0
5 Locked QAM256 501000000 Hz -1.0 dBmV 40.0 dB 0 0
6 Locked QAM256 507000000 Hz -1.3 dBmV 39.9 dB 0 0
7 Locked QAM256 513000000 Hz -1.3 dBmV 39.9 dB 0 0
8 Locked QAM256 519000000 Hz -1.5 dBmV 39.0 dB 0 0
9 Locked QAM256 525000000 Hz -1.8 dBmV 38.9 dB 0 0
10 Locked QAM256 531000000 Hz -2.0 dBmV 39.4 dB 0 0
11 Locked QAM256 537000000 Hz -2.4 dBmV 39.2 dB 0 0
12 Locked QAM256 543000000 Hz -2.9 dBmV 38.9 dB 0 0
13 Locked QAM256 549000000 Hz -3.6 dBmV 38.6 dB 0 0
14 Locked QAM256 555000000 Hz -4.1 dBmV 38.2 dB 0 0
15 Locked QAM256 561000000 Hz -5.2 dBmV 37.4 dB 0 0
16 Locked QAM256 567000000 Hz -5.9 dBmV 36.0 dB 0 0
18 Locked QAM256 579000000 Hz -0.3 dBmV 40.2 dB 0 0
19 Locked QAM256 585000000 Hz -2.7 dBmV 39.2 dB 0 0
20 Locked QAM256 591000000 Hz -3.1 dBmV 38.9 dB 0 0
21 Locked QAM256 597000000 Hz -3.7 dBmV 38.6 dB 0 0
22 Locked QAM256 603000000 Hz -3.9 dBmV 38.4 dB 0 0
23 Locked QAM256 609000000 Hz -5.0 dBmV 37.8 dB 0 0
24 Locked QAM256 615000000 Hz -4.9 dBmV 37.7 dB 0 0
159 Locked Other 708000000 Hz -5.2 dBmV 34.8 dB 24961729 1

 
Upstream Bonded Channels
Channel Channel ID Lock Status US Channel Type Frequency Width Power
1 4 Locked SC-QAM 16000000 Hz 6400000 Hz 42.5 dBmV
2 1 Locked SC-QAM 35600000 Hz 6400000 Hz 43.5 dBmV
3 2 Locked SC-QAM 29200000 Hz 6400000 Hz 43.0 dBmV
4 3 Locked SC-QAM 22800000 Hz 6400000 Hz 43.5 dBmV

 

Current System Time: Tue Jul 3 07:22:42 2018


 

to help diagnose and correct problems, if any should occur.

Time Priority Description
7-3-2018, 7:10:21 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:95:69:67:7d:51;CMTS-MAC=04:2a:e2:c7:e4:e9;CM-QOS=1.1;CM-VER=3.1;"
1-1-1970, 0:0:41 Notice(6) "Honoring MDD; IP provisioning mode = IPv6"
1-1-1970, 0:0:33 Critical(3) "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:95:69:67:7d:51;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
7-2-2018, 19:56:45 Critical(3) "Resetting the cable modem due to docsDevResetNow"
1-1-1970, 0:0:33 Critical(3) "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:95:69:67:7d:51;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
6-29-2018, 7:50:32 Critical(3) "Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=2c:95:69:67:7d:51;CMTS-MAC=04:2a:e2:c7:e4:e9;CM-QOS=1.1;CM-VER=3.1;"
6-29-2018, 7:50:20 Critical(3) "Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=2c:95:69:67:7d:51;CMTS-MAC=04:2a:e2:c7:e4:e9;CM-QOS=1.1;CM-VER=3.1;"
6-29-2018, 7:50:20 Critical(3) "Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=2c:95:69:67:7d:51;CMTS-MAC=04:2a:e2:c7:e4:e9;CM-QOS=1.1;CM-VER=3.1;"
6-29-2018, 7:48:32 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:95:69:67:7d:51;CMTS-MAC=04:2a:e2:c7:e4:e9;CM-QOS=1.1;CM-VER=3.1;"
6-22-2018, 22:9:46 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:95:69:67:7d:51;CMTS-MAC=04:2a:e2:c7:e4:e9;CM-QOS=1.1;CM-VER=3.1;"
 

 

Expert

Re: SB8200 Connectivity Problems

I've asked an employee to check the CMTS for real-time and historical RF signal reports from your modem. They can also check your local node/plant for any degradation or error reports. You can expect a reply in this thread. 



"Keepin' it clean since '09"
I am not a Comcast employee, just a moderator.
Official Employee

Re: SB8200 Connectivity Problems

Hello Mharris134. I can assist with troubleshooting your internet connectivity problems. To get started, please send me a private message and include your full name and account primary phone number so access your equipment. 

New Poster

Re: SB8200 Connectivity Problems

Joe for some reason the page is not loading for me to direct message you but the internet has dropped 6 times today and i have had to restart my modem. I used the tool online since i was away and i was trying to keep a track on everything with my cameras which i can review remotely but i constantly had no connectivity all night. This is becoming a huge hassle.

Official Employee

Re: SB8200 Connectivity Problems

Hi Mharris134. I apologize you continue to experience issues. I did receive your private message and I have responded. Please check your PMs.