Forum Discussion

cowboy101's avatar
cowboy101
New Contributor
8 years ago

Cable Modem Ramdomly Dropping

Switched to a DOCSIS 3.1 Arris SB8200 a week later started getting random disconnects. Called Cox and they told me it was my modem so exchanged it out. Still having the issue with the new one. I pulled this info out of the modem.

3-25-2018, 1:5:4
Notice(6)
"TLV-11 - unrecognized OID;CM-QOS=1.1;CM-VER=3.1;"
1-1-1970, 0:0:43
Warning(5)
"DHCP WARNING - Non-critical field invalid in response ;CM-QOS=1.1;CM-VER=3.1;"
1-1-1970, 0:0:41
Notice(6)
"Honoring MDD; IP provisioning mode = IPv4"
1-1-1970, 0:0:33
Critical(3)
"SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-QOS=1.1;CM-VER=3.1;"

Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 855000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Configuration File OK
Security Enabled BPI+
DOCSIS Network Access Enabled Allowed

Downstream Bonded Channels
Channel ID Lock Status Modulation Frequency Power SNR/MER Corrected Uncorrectables
8 Locked QAM256 855000000 Hz -4.8 dBmV 39.5 dB 0 0
1 Locked QAM256 813000000 Hz -3.7 dBmV 40.5 dB 0 0
2 Locked QAM256 819000000 Hz -4.7 dBmV 39.8 dB 0 0
3 Locked QAM256 825000000 Hz -5.3 dBmV 39.4 dB 0 0
4 Locked QAM256 831000000 Hz -5.2 dBmV 39.3 dB 0 0
5 Locked QAM256 837000000 Hz -4.7 dBmV 39.7 dB 0 0
6 Locked QAM256 843000000 Hz -4.6 dBmV 39.8 dB 0 0
7 Locked QAM256 849000000 Hz -4.8 dBmV 39.7 dB 0 0
9 Locked QAM256 861000000 Hz -5.0 dBmV 39.0 dB 0 0
10 Locked QAM256 867000000 Hz -4.0 dBmV 39.8 dB 0 0
11 Locked QAM256 873000000 Hz -4.0 dBmV 39.8 dB 0 0
12 Locked QAM256 879000000 Hz -4.1 dBmV 39.7 dB 0 0
13 Locked QAM256 885000000 Hz -4.1 dBmV 39.5 dB 0 0
14 Locked QAM256 891000000 Hz -4.4 dBmV 39.5 dB 0 0
15 Locked QAM256 897000000 Hz -4.3 dBmV 39.7 dB 0 0
16 Locked QAM256 903000000 Hz -4.0 dBmV 39.8 dB 8885 42052
17 Locked QAM256 909000000 Hz -3.7 dBmV 40.2 dB 14847 64060
18 Locked QAM256 915000000 Hz -3.3 dBmV 40.2 dB 16485 78967
19 Locked QAM256 921000000 Hz -3.8 dBmV 39.9 dB 16374 60649
20 Locked QAM256 927000000 Hz -3.5 dBmV 40.2 dB 5938 16752
21 Locked QAM256 933000000 Hz -3.4 dBmV 40.2 dB 0 0
22 Locked QAM256 939000000 Hz -3.8 dBmV 40.0 dB 0 0
23 Locked QAM256 945000000 Hz -3.9 dBmV 40.0 dB 0 0
24 Locked QAM256 951000000 Hz -4.7 dBmV 39.9 dB 0 0

Upstream Bonded Channels
Channel Channel ID Lock Status US Channel Type Frequency Width Power
1 2 Locked SC-QAM 24300000 Hz 6400000 Hz 46.5 dBmV
2 1 Locked SC-QAM 19400000 Hz 3200000 Hz 46.5 dBmV
3 3 Locked SC-QAM 30800000 Hz 6400000 Hz 46.5 dBmV
4 4 Locked SC-QAM 37300000 Hz 6400000 Hz 48.0 dBmV

  • Allan's avatar
    Allan
    Moderator
    8 years ago

    @cowboy101

    The modem is reporting multiple time out errors. Are there any splitters or signal amps on the cable line going to the modem?

    Allan - Cox Support Forums Moderator

  • cowboy101's avatar
    cowboy101
    New Contributor
    8 years ago

    When I signed up with Cox there was a splitter installed in the Cox box on the side of the house to feed other rooms. Those receivers have been removed. I did not touch the box on the side of the house since that is property of Cox. There are no signal amps installed.

  • StephanieS's avatar
    StephanieS
    Moderator
    8 years ago
    cowboy101

    I can see that a field technician is scheduled for this evening. If you have any further trouble after the technician has came and gone please reach out here, we're available 24/7.

    StephanieS
    Cox Support Forums Moderator
  • DCX105's avatar
    DCX105
    New Contributor
    8 years ago

    There was a bad batch of Arris SB8200s that came out over the last few months bough both on Amazon and other ISPs causing issues. Some people had to swap out the same model a few times before finding a non-bunk one.

  • cowboy101's avatar
    cowboy101
    New Contributor
    8 years ago

    Thank you Deadcow92, I will try getting another replacement wish me luck.