I am losing my internet connectivity on a daily basis, multiple times a day, from my Xfinity 400 package. On average, from a couple of minutes up to an hour. with 10 dropped signals at various times, throughout today. This problem started at the beginning of the year and is progressively get worse on a daily basis.
Xfinity came out for a service call yesterday. The service technician ran several diagnostic tests from the inside of the house and the tested numbers are within the acceptable range of tolerance.
I have the Netgear CM1150v V4.02.02 that works flawlessly since it was purchased. From the pole to the house, there no splitters attached. Several years ago Xfinity installed a 5 Port signal booster splitter PPC EV01-5-U/U
Again, no problems until this year. I have enclosed my stats and error logs for review and comment.
The log files below denote the following critical errors
- Started Unicast Maintenance Ranging - No Response received - T3
- No Ranging Response received - T3 time-out
- SYNC Timing Synchronization failure
- No Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities Ranging Response received - T3 time-out
I need some help with my Xfinity dropping connection and I appreciate any assistance.
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 |
Startup Procedure |
Procedure | Status | Comment | Acquire Downstream Channel | 579000000 Hz | Locked | Connectivity State | OK | Operational | Boot State | OK | Operational | Security | Enabled | BPI+ | IP Provisioning Mode | Honor MDD | honorMdd(4) |
|
Downstream Bonded Channels |
Channel | Lock Status | Modulation | Channel ID | Frequency | Power | SNR | Correctables | Uncorrectables | 1 | Locked | QAM256 | 21 | 579000000 Hz | 6.1 dBmV | 38.9 dB | 0 | 0 | 2 | Locked | QAM256 | 6 | 483000000 Hz | 5.9 dBmV | 39.4 dB | 0 | 0 | 3 | Locked | QAM256 | 7 | 489000000 Hz | 5.9 dBmV | 39.3 dB | 28 | 0 | 4 | Locked | QAM256 | 8 | 495000000 Hz | 6 dBmV | 39.2 dB | 32 | 1 | 5 | Locked | QAM256 | 9 | 507000000 Hz | 6.2 dBmV | 39.3 dB | 28 | 0 | 6 | Locked | QAM256 | 10 | 513000000 Hz | 6.1 dBmV | 39.3 dB | 1 | 0 | 7 | Locked | QAM256 | 11 | 519000000 Hz | 6.2 dBmV | 39.3 dB | 0 | 0 | 8 | Locked | QAM256 | 12 | 525000000 Hz | 6.2 dBmV | 39.2 dB | 0 | 0 | 9 | Locked | QAM256 | 13 | 531000000 Hz | 6.3 dBmV | 39.3 dB | 0 | 0 | 10 | Locked | QAM256 | 14 | 537000000 Hz | 6.3 dBmV | 39.2 dB | 0 | 0 | 11 | Locked | QAM256 | 15 | 543000000 Hz | 6.3 dBmV | 39.2 dB | 0 | 0 | 12 | Locked | QAM256 | 16 | 549000000 Hz | 6.3 dBmV | 39.2 dB | 0 | 0 | 13 | Locked | QAM256 | 17 | 555000000 Hz | 6.3 dBmV | 39.1 dB | 0 | 0 | 14 | Locked | QAM256 | 18 | 561000000 Hz | 6.3 dBmV | 39 dB | 0 | 0 | 15 | Locked | QAM256 | 19 | 567000000 Hz | 6.2 dBmV | 39 dB | 0 | 0 | 16 | Locked | QAM256 | 20 | 573000000 Hz | 6.2 dBmV | 38.9 dB | 0 | 0 | 17 | Locked | QAM256 | 22 | 585000000 Hz | 6.2 dBmV | 38.8 dB | 0 | 0 | 18 | Locked | QAM256 | 23 | 591000000 Hz | 6.1 dBmV | 38.8 dB | 0 | 0 | 19 | Locked | QAM256 | 24 | 597000000 Hz | 6.2 dBmV | 38.8 dB | 0 | 0 | 20 | Locked | QAM256 | 25 | 603000000 Hz | 6.1 dBmV | 38.7 dB | 0 | 0 | 21 | Locked | QAM256 | 26 | 609000000 Hz | 6.1 dBmV | 38.6 dB | 0 | 0 | 22 | Locked | QAM256 | 27 | 615000000 Hz | 6 dBmV | 38.5 dB | 0 | 0 | 23 | Locked | QAM256 | 28 | 621000000 Hz | 6 dBmV | 38.6 dB | 0 | 0 | 24 | Locked | QAM256 | 29 | 627000000 Hz | 6 dBmV | 38.5 dB | 1 | 0 | 25 | Locked | QAM256 | 30 | 633000000 Hz | 6.1 dBmV | 38.6 dB | 0 | 0 | 26 | Locked | QAM256 | 31 | 639000000 Hz | 5.9 dBmV | 38.5 dB | 0 | 0 | 27 | Locked | QAM256 | 32 | 645000000 Hz | 6.1 dBmV | 38.6 dB | 0 | 0 | 28 | Locked | QAM256 | 33 | 651000000 Hz | 6 dBmV | 38.4 dB | 0 | 0 | 29 | Locked | QAM256 | 34 | 657000000 Hz | 5.9 dBmV | 38.3 dB | 0 | 0 | 30 | Locked | QAM256 | 35 | 663000000 Hz | 5.8 dBmV | 38.2 dB | 0 | 0 | 31 | Locked | QAM256 | 36 | 669000000 Hz | 5.9 dBmV | 38.2 dB | 0 | 0 | 32 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV | 0.0 dB | 0 | 0 |
|
Upstream Bonded Channels |
Channel | Lock Status | US Channel Type | Channel ID | Symbol Rate | Frequency | Power | 1 | Locked | ATDMA | 1 | 5120 Ksym/sec | 35600000 Hz | 41 dBmV | 2 | Locked | ATDMA | 2 | 5120 Ksym/sec | 29200000 Hz | 41.8 dBmV | 3 | Locked | ATDMA | 3 | 5120 Ksym/sec | 22800000 Hz | 42.3 dBmV | 4 | Locked | ATDMA | 4 | 5120 Ksym/sec | 16400000 Hz | 42.5 dBmV | 5 | Not Locked | Unknown | 0 | 0 Ksym/sec | 0 Hz | 0.0 dBmV | 6 | Not Locked | Unknown | 0 | 0 Ksym/sec | 0 Hz | 0.0 dBmV | 7 | Not Locked | Unknown | 0 | 0 Ksym/sec | 0 Hz | 0.0 dBmV | 8 | Not Locked | Unknown | 0 | 0 Ksym/sec | 0 Hz | 0.0 dBmV |
|
Downstream OFDM Channels |
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 | 37 | 722000000 Hz | 6.2 dBmV | 37.6 dB | 1228 ~ 2867 | 2080859646 | 2043288292 | 0 | 2 | Not Locked | 0 | 0 | 0 Hz | 0 dBmV | 0.0 dB | 0 ~ 4095 | 0 | 0 | 0 |
|
Upstream OFDMA Channels |
Channel | Lock Status | Modulation / Profile ID | Channel ID | Frequency | Power | 1 | Not Locked | 0 | 0 | 0 Hz | 0 dBmV | 2 | Not Locked | 0 | 0 | 0 Hz | 0 dBmV |
|
Ryan3030
Regular Visitor
•
4 Messages
4 years ago
Event Log
Time
Priority
Description
Thu Feb 11 20:49:58 2021
Critical (3)
Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:01:5c:64:f0:79;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 09 14:54:02 2021
Notice (6)
CM-STATUS message sent. Event Type Code: 5; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:01:5c:64:f0:79;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 09 14:53:48 2021
Notice (6)
DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:01:5c:64:f0:79;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 09 14:53:43 2021
Notice (6)
TLV-11 - unrecognized OID;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:01:5c:64:f0:79;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=78:d2:94:59:93:70;CMTS-MAC=00:01:5c:64:f0:79;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=78:d2:94:59:93:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 09 14:45:11 2021
Notice (6)
CM-STATUS message sent. Event Type Code: 5; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:01:5c:64:f0:79;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 09 14:44:58 2021
Notice (6)
DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:01:5c:64:f0:79;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 09 14:44:53 2021
Notice (6)
TLV-11 - unrecognized OID;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:01:5c:64:f0:79;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=78:d2:94:59:93:70;CMTS-MAC=00:01:5c:64:f0:79;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=78:d2:94:59:93:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 09 14:23:52 2021
Notice (6)
CM-STATUS message sent. Event Type Code: 5; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:01:5c:64:f0:79;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 09 14:23:38 2021
Notice (6)
DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:01:5c:64:f0:79;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 09 14:23:33 2021
Notice (6)
TLV-11 - unrecognized OID;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:01:5c:64:f0:79;CM-QOS=1.1;CM-VER=3.1;
Time Not Established
Notice (6)
Honoring MDD; IP provisioning mode = IPv6
Time Not Established
Critical (3)
SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 09 14:21:17 2021
Notice (6)
CM-STATUS message sent. Event Type Code: 5; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:01:5c:64:f0:79;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 09 14:21:05 2021
Notice (6)
DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:01:5c:64:f0:79;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 09 14:21:04 2021
Notice (6)
TLV-11 - unrecognized OID;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:01:5c:64:f0:79;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 09 14:21:10 2021
Notice (6)
Honoring MDD; IP provisioning mode = IPv6
Tue Feb 09 14:21:01 2021
Warning (5)
Lost MDD Timeout;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 09 14:20:54 2021
Critical (3)
SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 09 14:16:52 2021
Critical (3)
Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:01:5c:64:f0:79;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 09 14:16:52 2021
Critical (3)
SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:01:5c:64:f0:79;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 09 14:16:46 2021
Critical (3)
Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:01:5c:64:f0:79;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 09 14:16:46 2021
Critical (3)
SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:01:5c:64:f0:79;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 09 14:16:40 2021
Critical (3)
Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:01:5c:64:f0:79;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 09 14:16:39 2021
Critical (3)
SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:01:5c:64:f0:79;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 09 14:15:42 2021
Critical (3)
Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:01:5c:64:f0:79;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 09 14:15:41 2021
Critical (3)
SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:01:5c:64:f0:79;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 09 14:13:32 2021
Warning (5)
MDD message timeout;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:01:5c:64:f0:79;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 09 14:13:30 2021
Critical (3)
SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:01:5c:64:f0:79;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 09 14:13:23 2021
Notice (6)
CM-STATUS message sent. Event Type Code: 16; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:01:5c:64:f0:79;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 09 14:13:22 2021
Notice (6)
CM-STATUS message sent. Event Type Code: 20; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:01:5c:64:f0:79;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 09 13:57:39 2021
Critical (3)
Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:01:5c:64:f0:79;CM-QOS=1.1;CM-VER=3.1;
Mon Feb 08 23:59:49 2021
Notice (6)
CM-STATUS message sent. Event Type Code: 24; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0.;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:01:5c:64:f0:79;CM-QOS=1.1;CM-VER=3.1;
Mon Feb 08 23:59:41 2021
Notice (6)
CM-STATUS message sent. Event Type Code: 23; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:01:5c:64:f0:79;CM-QOS=1.1;CM-VER=3.1;
Mon Feb 08 23:59:41 2021
Notice (6)
CM-STATUS message sent. Event Type Code: 22; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=78:d2:94:59:93:70;CMTS-MAC=00:01:5c:64:f0:79;CM-QOS=1.1;CM-VER=3.1;
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EG
Expert
•
111.7K Messages
4 years ago
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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Ryan3030
Regular Visitor
•
4 Messages
4 years ago
Thank you!
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EG
Expert
•
111.7K Messages
4 years ago
My pleasure !
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Ryan3030
Regular Visitor
•
4 Messages
4 years ago
Any luck or updates? My internet is up and down like a yo-yo.
Thank you,
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EG
Expert
•
111.7K Messages
4 years ago
I can't know what happens after I escalate something, sorry. I can however try re-escalating this.
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