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Forum Discussion
CM500 Modem is showing errors - log shows critical errors
Can someone help me explain these critical errors and time outs?
4 Replies
It's not letting me upload my screenshot but here's a summary of today's errors:
Time Priority Description 2021-1-20, 09:30:04 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=3c:37:86:02:d2:60;CMTS-MAC=00:90:f0:54:09:00;CM-QOS=1.1;CM-VER=3.0; 1970-1-1, 00:00:38 Notice (6) Honoring MDD; IP provisioning mode = IPv6 1970-1-1, 00:00:21 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=3c:37:86:02:d2:60;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 2021-1-20, 09:19:48 Critical (3) SYNC Timing Synchronization failure - Failed to receive MAC SYNC frame within time-out period;CM-MAC=3c:37:86:02:d2:60;CMTS-MAC=00:90:f0:54:09:00;CM-QOS=1.1;CM-VER=3.0; 2021-1-20, 09:18:23 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=3c:37:86:02:d2:60;CMTS-MAC=00:90:f0:54:09:00;CM-QOS=1.1;CM-VER=3.0; 2021-1-20, 09:16:32 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=3c:37:86:02:d2:60;CMTS-MAC=00:90:f0:54:09:00;CM-QOS=1.1;CM-VER=3.0; Do you have a snip of the cable connections page ?
Thanks for your reponse. Here's what I see:
Startup Procedure Procedure Status Comment Acquire Downstream Channel 507000000 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 4 507000000 Hz 0.6 dBmV 42.9 dB 0 0 2 Locked QAM256 1 489000000 Hz 0.9 dBmV 45.9 dB 0 0 3 Locked QAM256 2 495000000 Hz 0.8 dBmV 45.7 dB 0 0 4 Locked QAM256 3 501000000 Hz 0.7 dBmV 44.8 dB 0 0 5 Locked QAM256 5 513000000 Hz 0.6 dBmV 45.3 dB 0 0 6 Locked QAM256 6 519000000 Hz 0.6 dBmV 44.6 dB 0 0 7 Locked QAM256 7 525000000 Hz 0.7 dBmV 44.9 dB 0 0 8 Locked QAM256 8 531000000 Hz 1 dBmV 45.6 dB 0 0 9 Locked QAM256 9 537000000 Hz 1.1 dBmV 44.4 dB 0 0 10 Locked QAM256 10 543000000 Hz 1.2 dBmV 45.1 dB 0 0 11 Locked QAM256 11 549000000 Hz 1.2 dBmV 45.7 dB 0 0 12 Locked QAM256 12 555000000 Hz 1.1 dBmV 45.5 dB 0 0 13 Locked QAM256 13 561000000 Hz 1 dBmV 45.6 dB 0 0 14 Locked QAM256 14 567000000 Hz 1 dBmV 44.9 dB 0 0 15 Locked QAM256 15 573000000 Hz 0.9 dBmV 44.9 dB 0 0 16 Locked QAM256 16 579000000 Hz 1 dBmV 44.2 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 38800000 Hz 41.3 dBmV 2 Locked ATDMA 2 5120 Ksym/sec 32400000 Hz 41 dBmV 3 Locked ATDMA 3 5120 Ksym/sec 26000000 Hz 39.7 dBmV 4 Locked ATDMA 4 5120 Ksym/sec 19600000 Hz 40 dBmV Your power levels are spot on. And you tend to get those errors when you first boot up your modem.
If you continue to get those errors repeatedly after using it for a period of time, repost the logs and the cable connections page.
Are you having an issue?
