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Started Unicast Maintenance Ranging - No Response received - T3 time-out
I keep having these T3 errors. I had a technician come out a month or so ago to diagnose the problem, and the issue he found left me at the mercy of Xfinity. He mentioned something about the need to upgrade the local node.
I am using a Netgear CM3000, and I have the error log.
Thanks for looking this over.
Cable Diagnostic
Status: Good
Action:
Your setup looks fine. If you can't access the internet, make sure you properly activated the modem. If modem has been activated and you still can't access the internet, contact your service provider for troubleshooting help.
If you can access the internet but has other internet issue, the Netgear Cable Knowledge Base can provide additional troubleshooting info.
CM Status: Good
Downstream Status: Good
Downstream Power Level: Good
Downstream SNR Level: Good
Upstream Status: Good
Upstream Power Level: Good
Current Time: Mon Feb 16 10:31:58 2026
Startup Procedure
Acquire Downstream Channel: 405000000 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 4 405000000 Hz 5.9 41.2 1517088 4983370
2 Locked QAM256 1 387000000 Hz 6.3 42.8 25820 11867
3 Locked QAM256 2 393000000 Hz 6.5 43 10184 967
4 Locked QAM256 3 399000000 Hz 5.8 41.9 1710337 5755275
5 Locked QAM256 5 411000000 Hz 5.8 41.8 1772537 5641251
6 Locked QAM256 6 417000000 Hz 5.2 43.2 0 0
7 Locked QAM256 7 423000000 Hz 5.4 43.2 0 0
8 Locked QAM256 8 429000000 Hz 5.2 43.2 0 0
9 Locked QAM256 9 435000000 Hz 4.7 43 0 0
10 Locked QAM256 10 441000000 Hz 4.8 42.9 0 0
11 Locked QAM256 11 447000000 Hz 4.4 42.8 0 0
12 Locked QAM256 12 453000000 Hz 4 42.7 0 0
13 Locked QAM256 13 459000000 Hz 3.9 42.3 0 0
14 Locked QAM256 14 465000000 Hz 3.5 42.1 0 0
15 Locked QAM256 15 471000000 Hz 3.5 42 0 0
16 Locked QAM256 16 477000000 Hz 3.6 42.2 0 0
17 Locked QAM256 17 483000000 Hz 2.8 41.7 0 0
18 Locked QAM256 18 489000000 Hz 2.4 41.5 0 0
19 Locked QAM256 19 495000000 Hz 2.7 41.7 0 0
20 Locked QAM256 20 501000000 Hz 2.6 41.8 0 0
21 Locked QAM256 21 507000000 Hz 2.6 41.8 0 0
22 Locked QAM256 22 513000000 Hz 2.2 41.5 0 0
23 Locked QAM256 23 519000000 Hz 1.9 41.2 0 0
24 Locked QAM256 24 525000000 Hz 1.8 41.2 0 0
25 Locked QAM256 25 531000000 Hz 1.8 41.2 0 0
26 Locked QAM256 26 537000000 Hz 1.9 41.3 0 0
27 Locked QAM256 27 543000000 Hz 1.8 41.2 0 0
28 Locked QAM256 28 549000000 Hz 1.6 41 0 0
29 Locked QAM256 29 555000000 Hz 1.1 40.6 0 0
30 Locked QAM256 30 561000000 Hz 0.9 40.5 0 0
31 Locked QAM256 31 567000000 Hz 1.5 40.9 0 0
32 Locked QAM256 32 573000000 Hz 1.3 40.8 0 0
Upstream Bonded Channels
Channel LockedStatus ChannelType ChannelID SymbolRate Frequency Power
1 Locked ATDMA 3 5120 Ksym/sec 29200000 Hz 40.8 dBmV
2 Locked ATDMA 2 5120 Ksym/sec 22800000 Hz 40.5 dBmV
3 Locked ATDMA 1 5120 Ksym/sec 16400000 Hz 40.8 dBmV
4 Locked ATDMA 4 5120 Ksym/sec 35600000 Hz 40.8 dBmV
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 ,3 193 722000000 Hz -2.12 dBmV 37.6 dB 448 ~ 3647 44697930 40709262 0
2 Locked 0 ,1 ,2 ,3 194 957000000 Hz -7.02 dBmV 32.9 dB 148 ~ 3947 45684332 34306582 181739
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
Mon Feb 16 10:31:38 2026 Notice (6) CM-STATUS message sent. Event Type Code: 4; Chan ID: 3 5; 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;
Mon Feb 16 10:31:07 2026 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;
Mon Feb 16 10:31:06 2026 Warning (5) MDD message timeout;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
Mon Feb 16 10:30:15 2026 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;
Mon Feb 16 10:29:07 2026 Notice (6) CM-STATUS message sent. Event Type Code: 5; Chan ID: 3 4 5; 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;
Mon Feb 16 10:27:37 2026 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;
Mon Feb 16 10:25:37 2026 Notice (6) CM-STATUS message sent. Event Type Code: 4; Chan ID: 3 5; 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;
Mon Feb 16 10:25:07 2026 Warning (5) MDD message timeout;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
Mon Feb 16 10:24:25 2026 Notice (6) CM-STATUS message sent. Event Type Code: 5; Chan ID: 3 4 5; 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;
Mon Feb 16 10:23:53 2026 Notice (6) CM-STATUS message sent. Event Type Code: 2; Chan ID: 5; 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;
Mon Feb 16 10:23:36 2026 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;
Mon Feb 16 10:22:14 2026 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;
Mon Feb 16 10:21:46 2026 Warning (5) TCS Partial Service;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
Mon Feb 16 10:21:44 2026 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;
Mon Feb 16 10:21:19 2026 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;
Mon Feb 16 10:21:10 2026 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;
Mon Feb 16 10:18:47 2026 Notice (6) CM-STATUS message sent. Event Type Code: 4; Chan ID: 3 5; 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;
Mon Feb 16 10:18:16 2026 Warning (5) MDD message timeout;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
Mon Feb 16 10:17:49 2026 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;
Mon Feb 16 10:11:31 2026 Notice (6) CM-STATUS message sent. Event Type Code: 22; Chan ID: 194; 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;
Mon Feb 16 10:11:03 2026 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;
Mon Feb 16 10:10:45 2026 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;
Mon Feb 16 10:10:21 2026 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;
Mon Feb 16 10:10:18 2026 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;
Mon Feb 16 10:10:15 2026 Warning (5) TCS Partial Service;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
Mon Feb 16 10:10:10 2026 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;
Mon Feb 16 10:10:07 2026 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;
Mon Feb 16 10:10:05 2026 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;
Mon Feb 16 10:07:24 2026 Notice (6) CM-STATUS message sent. Event Type Code: 4; Chan ID: 3 5; 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;
Mon Feb 16 10:07:00 2026 Warning (5) MDD message timeout;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
Mon Feb 16 10:06:44 2026 Notice (6) CM-STATUS message sent. Event Type Code: 5; Chan ID: 3 4 5; 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;
Mon Feb 16 10:06:36 2026 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;
Mon Feb 16 10:06:05 2026 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;
Mon Feb 16 10:05:41 2026 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;
Mon Feb 16 10:03:23 2026 Notice (6) CM-STATUS message sent. Event Type Code: 20; Chan ID: 194; 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;
Mon Feb 16 10:03:08 2026 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;
Mon Feb 16 09:59:15 2026 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;
Mon Feb 16 09:58:45 2026 Warning (5) TCS Partial Service;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
Mon Feb 16 09:58:42 2026 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;
Mon Feb 16 09:56:57 2026 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;
No Responses!