Started Unicast Maintenance Ranging - No Response received - T3 time-out
I keep getting
Started Unicast Maintenance Ranging - No Response received - T3 time-out
Forum Discussion
This indicates a problem on your upstream connection. Confirm that all connections are tight. Replace interior cables with brand new high quality RG6 if practical. Remove all unnecessary splitters. If problems persist, contact Cox and request a tech visit as T3 timeouts are often caused by problems outside the boundaries of your property. Post your modem signals and full logs for more complete advice.
All connections are tight and all cables are high quality RG6
Here is the modem signals
tarting Frequency <tabindex=-1>Startup Procedure Procedure Status Comment Acquire Downstream Channel 855000000 Hz Locked Connectivity State OK Operational Boot State OK Operational Security Enable BPI+ IP Provisioning Mode Honor MDD IPv4 only <tabindex=-1>Downstream Bonded Channels Channel Lock Status Modulation Channel ID Frequency Power SNR / MER Unerrored Codewords Correctable Codewords Uncorrectable Codewords 1 Locked QAM256 13 855000000 Hz 6.6 dBmV 44.9 dB 4142770845 84 294 2 Locked QAM256 1 783000000 Hz 7.0 dBmV 45.1 dB 4141326958 32 0 3 Locked QAM256 2 789000000 Hz 6.9 dBmV 45.1 dB 4274583369 846 636 4 Locked QAM256 3 795000000 Hz 6.8 dBmV 45.0 dB 4274590126 802 609 5 Locked QAM256 4 801000000 Hz 7.0 dBmV 45.1 dB 4274577501 673 701 6 Locked QAM256 5 807000000 Hz 7.0 dBmV 45.3 dB 4274608176 683 634 7 Locked QAM256 6 813000000 Hz 7.0 dBmV 45.1 dB 4274589750 724 708 8 Locked QAM256 7 819000000 Hz 6.8 dBmV 45.0 dB 4274370609 695 722 9 Locked QAM256 8 825000000 Hz 6.5 dBmV 44.9 dB 4274377815 738 671 10 Locked QAM256 9 831000000 Hz 6.5 dBmV 44.9 dB 4274557633 677 643 11 Locked QAM256 10 837000000 Hz 6.5 dBmV 44.9 dB 4274383564 709 618 12 Locked QAM256 11 843000000 Hz 6.6 dBmV 44.9 dB 4274584807 1248 1769 13 Locked QAM256 12 849000000 Hz 6.6 dBmV 44.9 dB 4274593436 876 1082 14 Locked QAM256 14 861000000 Hz 6.5 dBmV 44.6 dB 4274601823 745 678 15 Locked QAM256 15 867000000 Hz 6.5 dBmV 44.7 dB 4274617207 740 653 16 Locked QAM256 16 873000000 Hz 6.7 dBmV 44.9 dB 4274625882 726 660 17 Locked QAM256 17 879000000 Hz 6.8 dBmV 44.9 dB 4274628006 729 591 18 Locked QAM256 18 885000000 Hz 6.7 dBmV 44.9 dB 4274636841 635 663 19 Locked QAM256 19 891000000 Hz 6.7 dBmV 44.8 dB 4274643198 662 613 20 Locked QAM256 20 897000000 Hz 6.9 dBmV 44.9 dB 4274648951 710 568 21 Locked QAM256 21 903000000 Hz 6.9 dBmV 44.9 dB 4274654577 635 615 22 Locked QAM256 22 909000000 Hz 7.1 dBmV 44.9 dB 4274661763 688 596 23 Locked QAM256 23 915000000 Hz 7.2 dBmV 44.9 dB 4274667466 692 568 24 Locked QAM256 24 921000000 Hz 7.2 dBmV 44.9 dB 4274672976 714 624 25 Locked QAM256 25 927000000 Hz 7.4 dBmV 45.1 dB 4274677403 666 616 26 Locked QAM256 26 933000000 Hz 7.4 dBmV 45.0 dB 4274682987 688 593 27 Locked QAM256 27 939000000 Hz 7.5 dBmV 45.1 dB 4274690217 696 565 28 Locked QAM256 28 945000000 Hz 7.6 dBmV 45.0 dB 4274693122 679 587 29 Locked QAM256 29 951000000 Hz 7.6 dBmV 45.0 dB 4274698023 744 611 30 Locked QAM256 30 957000000 Hz 7.7 dBmV 45.0 dB 4274714988 661 614 31 Locked QAM256 31 963000000 Hz 7.7 dBmV 45.1 dB 4274699085 689 559 32 Locked QAM256 32 969000000 Hz 7.7 dBmV 45.0 dB 4274698793 672 601 <tabindex=-1>Upstream Bonded Channels Channel Lock Status Modulation Channel ID Frequency Power 1 Locked ATDMA 1 17600000 Hz 40.5 dBmV 2 Locked ATDMA 2 24000000 Hz 41.0 dBmV 3 Locked ATDMA 3 30400000 Hz 41.5 dBmV 4 Locked ATDMA 4 36800000 Hz 41.5 dBmV 5 Not Locked Unknown 0 0 Hz 0.0 dBmV 6 Not Locked Unknown 0 0 Hz 0.0 dBmV 7 Not Locked Unknown 0 0 Hz 0.0 dBmV 8 Not Locked Unknown 0 0 Hz 0.0 dBmV Cox tech had come a few months ago and said all signals looked good
Downstream signals look good but you have T3 timeouts. This points to a problem on the upstream, most likely not on your property. Cox needs to investigate. Could be a bad amplifier, problem in the tap, neighbor backfeeding noise, etc. You won't be able to figure it out. Only Cox can fix it.
No. It indicates a lack of response from the upstream server to a request from the modem. Repeated requests without a response leads to a failure.
Uh, not sure why you're downvoting when I'm trying to help. That's technically true bit it makes it sound like there's a problem with the Cox CCAP. If your modem sends several RNG-REQ messages without receiving an RNG-RSP message it logs a T3 timeout. If the whole CCAP was down you'd see a complete loss of connectivity. The reason the modem isn't getting a RNG-RSP is because the RNG-REQ is never getting to the CCAP. This is almost always due to noise on the upstream which only a Cox technician can fix.
Or it does get there, but CCAP does not respond.
