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internet stability issues.
I have been issues with stability of internet necessitating rebooting modem and access points on a regular basis. This has been an ongoing issue for sometime and struggling with identifying root cause. Below is the detail from the cable modem (Nighthawk CM2050V). The overall status is poor with upload speed as poor. From the box on the side of the home, it is a direct run to the cable modem (there are no splitters). There are numerous timeout errors - assume that this is not normal. On the most current firmware supported by Comcast. Any assistance would be appreciated.
Cable Diagnostic
Status: Poor
Action:
[Partial Service]
If the Partial Service mode does not go away within a few hours (Click the Refresh button after each step):
1) Make sure the coaxial cable is tightly connected.
2) Remove any unnecessary splitters.
3) Replace any required ones.
4) Contact your service provider for troubleshooting help.
CM Status: Good
Downstream Status: Good
Downstream Power Level: Good
Downstream SNR Level: Good
Upstream Status: Poor
Partial Service: Poor
Cable modem is in partial service mode. Your service provider might be under maintenance. Most of the time it won't affect your traffic and will automatically clear when work is complete.
Upstream Power Level: Good
Current Time: Sat Dec 27 21:08:14 2025
Startup Procedure
Acquire Downstream Channel: 597000000 Hz Locked
Connectivity State: OK Operational
Boot State: OK Operational
Security: Enabled BPI+
IP Provisioning Mode: Honor MDD IPv6 only
Downstream Bonded Channels
Channel LockedStatus Modulation ChannelID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 30 597000000 Hz 2.9 42.6 0 0
2 Locked QAM256 1 417000000 Hz -0.7 41.2 0 0
3 Locked QAM256 2 423000000 Hz -0.2 41.4 0 0
4 Locked QAM256 3 429000000 Hz 0.1 41.5 0 0
5 Locked QAM256 4 435000000 Hz 0.2 41.5 0 0
6 Locked QAM256 5 441000000 Hz 0.2 41.5 0 0
7 Locked QAM256 6 453000000 Hz 0.1 41.3 0 0
8 Locked QAM256 7 459000000 Hz 0.4 41.5 0 0
9 Locked QAM256 8 465000000 Hz 0.6 41.6 0 0
10 Locked QAM256 9 471000000 Hz 0.6 41.7 0 0
11 Locked QAM256 10 477000000 Hz 0.8 41.8 0 0
12 Locked QAM256 11 483000000 Hz 1.1 42 0 0
13 Locked QAM256 12 489000000 Hz 1.3 42.1 0 0
14 Locked QAM256 13 495000000 Hz 1.7 42.3 0 0
15 Locked QAM256 14 501000000 Hz 1.9 42.5 0 0
16 Locked QAM256 15 507000000 Hz 2.2 42.8 0 0
17 Locked QAM256 16 513000000 Hz 2.3 42.7 0 0
18 Locked QAM256 17 519000000 Hz 2.3 42.8 0 0
19 Locked QAM256 18 525000000 Hz 2.1 42.7 0 0
20 Locked QAM256 19 531000000 Hz 2.2 42.8 0 0
21 Locked QAM256 20 537000000 Hz 2.3 42.8 0 0
22 Locked QAM256 21 543000000 Hz 2.5 42.8 0 0
23 Locked QAM256 22 555000000 Hz 2.8 42.8 0 0
24 Locked QAM256 23 561000000 Hz 3 42.9 0 0
25 Locked QAM256 24 567000000 Hz 2.8 42.6 0 0
26 Locked QAM256 26 573000000 Hz 2.5 42.6 0 0
27 Locked QAM256 27 579000000 Hz 2.6 42.5 0 0
28 Locked QAM256 28 585000000 Hz 2.7 42.6 0 0
29 Locked QAM256 29 591000000 Hz 2.5 42.4 0 0
30 Locked QAM256 31 603000000 Hz 3 42.6 0 0
31 Locked QAM256 32 609000000 Hz 2.9 42.6 0 0
32 Not Locked Unknown 0 0 Hz 0.0 0.0 0 0
Upstream Bonded Channels (Partial Service)
Channel LockedStatus ChannelType ChannelID SymbolRate Frequency Power
1 Locked ATDMA 24 5120 Ksym/sec 35600000 Hz 46.5 dBmV
2 Not Locked Unknown 0 0 0 0.0
3 Not Locked Unknown 0 0 0 0.0
4 Not Locked Unknown 0 0 0 0.0
5 Not Locked Unknown 0 0 0 0.0
6 Not Locked Unknown 0 0 0 0.0
7 Not Locked Unknown 0 0 0 0.0
8 Not Locked Unknown 0 0 0 0.0
Downstream OFDM Channels
Channel LockedStatus ProfileID ChannelID Frequency Power SNR/MER ActiveSubcarrier Unerror Correctable Uncorrectable
1 Locked 0 ,1 ,2 ,3 25 693000000 Hz 4.08 dBmV 42.6 dB 1108 ~ 2987 5668427 3387966 0
2 Not Locked 0 0 0 Hz 0 dBmV 0 dB 0 ~ 4095 0 0 0
Upstream OFDMA Channels
Channel LockedStatus ProfileID ChannelID Frequency Power
1 Not Locked 0 0 0 Hz 0 dBmV
2 Not Locked 0 0 0 Hz 0 dBmV
Event Log
Time Priority Description
Sat Dec 27 21:08:06 2025 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 21:06:10 2025 Notice (6) CM-STATUS message sent. Event Type Code: 7; Chan ID: 21 22 23; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 21:06:03 2025 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 21:05:45 2025 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 3;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 21:05:45 2025 Critical (3) Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 21:05:45 2025 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 21:05:45 2025 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 21:05:45 2025 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 1;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 21:05:45 2025 Critical (3) Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 21:05:45 2025 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 21:05:44 2025 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 2;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 21:05:44 2025 Critical (3) Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 21:05:44 2025 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 21:05:19 2025 Warning (5) TCS Partial Service;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 21:05:19 2025 Critical (3) Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 21:05:19 2025 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 21:05:19 2025 Critical (3) Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 21:05:19 2025 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 21:05:18 2025 Critical (3) Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 21:05:18 2025 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 21:04:57 2025 Notice (6) DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 21:04:51 2025 Notice (6) TLV-11 - unrecognized OID;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 21:04:42 2025 Notice (6) Honoring MDD; IP provisioning mode = IPv6
Sat Dec 27 21:04:38 2025 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 21:04:31 2025 Warning (5) ToD request sent - No Response received;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];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=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];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=[Edited: “Personal Information”];CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 21:03:10 2025 Warning (5) ToD request sent - No Response received;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 21:02:58 2025 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 21:01:52 2025 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 1;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 21:01:52 2025 Critical (3) Ranging Request Retries exhausted;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 21:01:52 2025 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 21:00:37 2025 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 3;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 21:00:37 2025 Critical (3) Ranging Request Retries exhausted;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 21:00:37 2025 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 20:57:32 2025 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 2;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 20:57:32 2025 Critical (3) Ranging Request Retries exhausted;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 20:57:32 2025 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Dec 27 20:54:39 2025 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 3;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;


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