Visitor

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2 Messages

Tuesday, July 21st, 2026 2:01 PM

my downstream power is -10 to -16 dBmV and status is showing red/poor.

Cable Diagnostic

Status: Poor

Action:
[Downstream Power Level]
Try these actions (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 splitters.
4) Contact your service provider for troubleshooting help.

CM Status: Good

Downstream Status: Bad

    Downstream Power Level: Bad
    Downstream power is poor (-15.7dBmV). The recommended level is between -10dBmV to 10dBmV.

    Downstream SNR Level: Good

Upstream Status: Good

    Upstream Power Level: Good


Current Time: Tue Jul 21 09:00:58 2026

Startup Procedure
Acquire Downstream Channel: 423000000 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     423000000 Hz     -15.2     38.6     0     0
      2     Locked     QAM256      1     405000000 Hz     -15     38.7     0     0
      3     Locked     QAM256      2     411000000 Hz     -15.3     38.4     0     0
      4     Locked     QAM256      3     417000000 Hz     -15.2     38.4     0     0
      5     Locked     QAM256      5     429000000 Hz     -15.2     38.6     0     0
      6     Locked     QAM256      6     435000000 Hz     -15.3     38.5     0     0
      7     Locked     QAM256      7     441000000 Hz     -15.5     38.4     0     0
      8     Locked     QAM256      8     447000000 Hz     -15.5     37.6     0     0
      9     Locked     QAM256      9     453000000 Hz     -15.7     37.4     0     0
     10     Locked     QAM256     10     459000000 Hz     -15.1     38.2     0     0
     11     Locked     QAM256     11     465000000 Hz     -14.9     38.3     0     0
     12     Locked     QAM256     12     471000000 Hz     -15.2     38     0     0
     13     Locked     QAM256     13     477000000 Hz     -15.3     37.3     0     0
     14     Locked     QAM256     14     483000000 Hz     -15.3     36.9     0     0
     15     Locked     QAM256     15     489000000 Hz     -15.3     37.1     0     0
     16     Locked     QAM256     16     495000000 Hz     -15.5     37.1     0     0
     17     Locked     QAM256     17     501000000 Hz     -15.4     32.6     0     0
     18     Locked     QAM256     18     507000000 Hz     -14.7     38.2     0     0
     19     Locked     QAM256     19     513000000 Hz     -14.4     38.4     0     0
     20     Locked     QAM256     20     519000000 Hz     -14.9     38.4     0     0
     21     Locked     QAM256     21     525000000 Hz     -14.8     38.1     0     0
     22     Locked     QAM256     22     531000000 Hz     -14.6     38.1     0     0
     23     Locked     QAM256     23     537000000 Hz     -14.1     38.8     0     0
     24     Locked     QAM256     24     543000000 Hz     -13.7     39.1     0     0
     25     Locked     QAM256     25     549000000 Hz     -14.1     39     0     0
     26     Locked     QAM256     26     561000000 Hz     -13.9     39.3     0     0
     27     Locked     QAM256     27     567000000 Hz     -13     40     0     0
     28     Locked     QAM256     28     573000000 Hz     -11.7     41     0     0
     29     Locked     QAM256     29     579000000 Hz     -11.2     41.3     0     0
     30     Locked     QAM256     30     585000000 Hz     -10.9     41.5     0     0
     31     Locked     QAM256     31     591000000 Hz     -10.7     41.5     0     0
     32     Locked     QAM256     32     597000000 Hz     -10.3     41.9     0     0

Upstream Bonded Channels
Channel   LockedStatus  ChannelType ChannelID   SymbolRate        Frequency       Power     
      1       Locked       ATDMA      3       5120 Ksym/sec       29200000 Hz       54.8 dBmV
      2       Locked       ATDMA      2       5120 Ksym/sec       22800000 Hz       50.5 dBmV
      3       Locked       ATDMA      1       5120 Ksym/sec       16400000 Hz       49.3 dBmV
      4       Locked       ATDMA      4       5120 Ksym/sec       35600000 Hz       52.5 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     690000000 Hz     -11.02 dBmV     38.3 dB     688 ~ 3407     20483576     19693707     1912
      2     Locked     0 ,1 ,2 ,3     194     957000000 Hz     -17.72 dBmV     32.9 dB     148 ~ 3947     21344988     10236041     10560728

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
Tue Jul 21 08:43:31 2026     Notice (6)     CM-STATUS message sent. Event Type Code: 16; Chan ID: 193 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2 3.;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Tue Jul 21 08:42:08 2026     Notice (6)     CM-STATUS message sent. Event Type Code: 16; Chan ID: 193 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Tue Jul 21 08:41:54 2026     Critical (3)     UCD invalid or channel unusable;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Tue Jul 21 08:41:48 2026     Notice (6)     DS profile assignment change. DS Chan ID: 33; 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;
Tue Jul 21 08:41:47 2026     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;
Tue Jul 21 08:41:40 2026     Notice (6)     TLV-11 - unrecognized OID;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Tue Jul 21 08:41:31 2026     Notice (6)     Honoring MDD; IP provisioning mode = IPv6
Tue Jul 21 08:41:29 2026     Critical (3)     UCD invalid or channel unusable;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Tue Jul 21 08:41:23 2026     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)     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;
Tue Jul 21 07:51:16 2026     Critical (3)     UCD invalid or channel unusable;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Tue Jul 21 07:51:10 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;
Tue Jul 21 07:51:09 2026     Critical (3)     UCD invalid or channel unusable;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Tue Jul 21 07:51:08 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;
Tue Jul 21 07:51:08 2026     Critical (3)     UCD invalid or channel unusable;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Tue Jul 21 07:50:44 2026     Critical (3)     UCD invalid or channel unusable;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;
Fri Jul 10 12:08:53 2026     Critical (3)     Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Fri Jul 10 09:45:45 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;
Thu Jul 09 07:01:02 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;
Thu Jul 09 06:02:31 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;
Wed Jul 08 16:33:33 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;
Wed Jul 08 11:31:17 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;
Wed Jul 08 03:41:18 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;
Tue Jul 07 14:24:28 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 Jul 06 11:30:38 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 Jul 06 07:55:33 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 Jul 06 03:59:22 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 Jul 06 01:54:44 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;
Sun Jul 05 12:51:57 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;
Sun Jul 05 11:55:48 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;
Sat Jul 04 13:47:01 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;
Sat Jul 04 07:54:20 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;
Sat Jul 04 06:07:01 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;
Sat Jul 04 01:11:59 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;
Fri Jul 03 06:45:02 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;
Thu Jul 02 08:34:43 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;
Thu Jul 02 03:30:55 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;
Thu Jul 02 03:03:43 2026     Critical (3)     UCD invalid or channel unusable;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

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Official Employee

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3.2K Messages

2 hours ago

 

user_a9mi7z Hello! Can you also please try power cycling your modem by pulling the power cable out of it for about 20-seconds and then plugging it back in? If you're still having the same issue, please let us know.

 

Visitor

 • 

2 Messages

Yes I did try that and was getting the same results.

Official Employee

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3.2K Messages

 

user_a9mi7z Thank you for doing that for us. We'll need to take a closer look at the signal we're sending you and see what we can find out. Please send a Direct Message with your full name and address. Here are instructions on how to send a DM in case you need them:

 Click "Sign In" if necessary
  • Click the "Direct Message" icon (upper right corner of this page)
  • Click the "New message" (pencil and paper) icon
  • Type "Xfinity Support" in the to line and select "Xfinity Support" from the drop-down list
  • Type your message in the text area near the bottom of the window
  • Press Enter to send your message

 

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