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Action:
[Partial Service]
If the Partial Service mode does not go away within a few hours (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 ones.
4) Contact your service provider for troubleshooting help.
[Downstream SNR]
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.
The Cable diagnostics info details below:
Cable Diagnostic
Status: Poor
Action:
[Downstream SNR]
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: Poor
Downstream Power Level: Good
Downstream SNR Level: Poor
Downstream SNR (signal to noise ratio) is poor (27.7dB). The recommended level is greater than 30dB.
Upstream Status: Good
Upstream Power Level: Good
Current Time: Sat Mar 28 20:39:55 2026
Startup Procedure
Acquire Downstream Channel: 543000000 Hz Locked
Connectivity State: OK Operational
Boot State: OK Operational
Security: Enabled BPI+
IP Provisioning Mode: Honor MDD IPv6 only
Downstream Bonded Channels (Partial Service)
Channel LockedStatus Modulation ChannelID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 28 543000000 Hz -9.9 37.1 323 325
2 Locked QAM256 13 453000000 Hz -1 32.8 199 179
3 Locked QAM256 14 459000000 Hz -0.7 44.3 145 97
4 Locked QAM256 15 465000000 Hz 1.2 41.6 1444 7359
5 Locked QAM256 16 471000000 Hz -0.3 44.4 62 20
6 Locked QAM256 17 477000000 Hz -3.8 42.5 199 227
7 Locked QAM256 18 483000000 Hz -2.3 33.1 262 317
8 Locked QAM256 19 489000000 Hz -6 35 41682 4570
9 Locked QAM256 20 495000000 Hz -5.4 41.8 263 311
10 Locked QAM256 26 531000000 Hz -6.5 32.3 2208 379
11 Locked QAM256 27 537000000 Hz -5.8 39.7 373 341
12 Locked QAM256 29 549000000 Hz -7.2 34 269 327
13 Locked QAM256 30 555000000 Hz -4.7 28 5828886 394991
14 Locked QAM256 32 567000000 Hz -4.8 27.7 91434080 19431985
15 Locked QAM256 33 573000000 Hz -2.6 32.7 58129 175
16 Locked QAM256 34 579000000 Hz -4.9 32.1 269008 229
17 Locked QAM256 35 585000000 Hz -2.3 32.5 35055 70
18 Locked QAM256 36 591000000 Hz -1.6 34.1 85 0
19 Locked QAM256 40 615000000 Hz -6 38.4 61816551 37798505
20 Locked QAM256 41 621000000 Hz -5.5 28.5 40846086 110261290
21 Locked QAM256 42 627000000 Hz -5.9 27.8 30708422 86130238
22 Locked QAM256 43 633000000 Hz -4.9 28.7 53181398 133860620
23 Locked QAM256 44 639000000 Hz -3.5 40.4 9846318 3160444
24 Not Locked Unknown 0 0 Hz 0.0 0.0 0 0
25 Not Locked Unknown 0 0 Hz 0.0 0.0 0 0
26 Not Locked Unknown 0 0 Hz 0.0 0.0 0 0
27 Not Locked Unknown 0 0 Hz 0.0 0.0 0 0
28 Not Locked Unknown 0 0 Hz 0.0 0.0 0 0
29 Not Locked Unknown 0 0 Hz 0.0 0.0 0 0
30 Not Locked Unknown 0 0 Hz 0.0 0.0 0 0
31 Not Locked Unknown 0 0 Hz 0.0 0.0 0 0
32 Not Locked Unknown 0 0 Hz 0.0 0.0 0 0
Upstream Bonded Channels
Channel LockedStatus ChannelType ChannelID SymbolRate Frequency Power
1 Locked ATDMA 18 5120 Ksym/sec 22800000 Hz 50.5 dBmV
2 Locked ATDMA 19 5120 Ksym/sec 29200000 Hz 54.5 dBmV
3 Locked ATDMA 20 5120 Ksym/sec 35600000 Hz 54.5 dBmV
4 Locked ATDMA 17 5120 Ksym/sec 16400000 Hz 54.0 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 -2.62 dBmV 37.9 dB 388 ~ 3707 140662533 139848205 294995
2 Locked 0 ,1 ,2 ,3 194 957000000 Hz -2.92 dBmV 39.1 dB 148 ~ 3947 102207561 97327768 432
Upstream OFDMA Channels
Channel LockedStatus ProfileID ChannelID Frequency Power
1 Locked 10 ,13 43 36200000 Hz 48.5 dBmV
2 Not Locked 0 0 0 Hz 0 dBmV
Event Log
Time Priority Description
Sat Mar 28 20:39:51 2026 Warning (5) MDD message timeout;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Mar 28 20:39:51 2026 Notice (6) CM-STATUS message sent. Event Type Code: 4; Chan ID: 32 40 42 43; 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;
Sat Mar 28 20:39:49 2026 Warning (5) MDD message timeout;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Mar 28 20:39:49 2026 Notice (6) CM-STATUS message sent. Event Type Code: 2; Chan ID: 42 43; 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;
Sat Mar 28 20:39:47 2026 Notice (6) CM-STATUS message sent. Event Type Code: 2; Chan ID: 43; 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;
Sat Mar 28 20:39:43 2026 Warning (5) MDD message timeout;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Mar 28 20:39:16 2026 Notice (6) CM-STATUS message sent. Event Type Code: 4; Chan ID: 32 40 41 42 43; 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;
Sat Mar 28 20:39:15 2026 Notice (6) CM-STATUS message sent. Event Type Code: 5; Chan ID: 41 42 43; 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;
Sat Mar 28 20:39:11 2026 Warning (5) MDD message timeout;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Mar 28 20:39:06 2026 Notice (6) CM-STATUS message sent. Event Type Code: 4; Chan ID: 32 40 41 43; 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;
Sat Mar 28 20:39:05 2026 Notice (6) CM-STATUS message sent. Event Type Code: 2; Chan ID: 41; 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;
Sat Mar 28 20:39:03 2026 Warning (5) MDD message timeout;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Mar 28 20:39:03 2026 Notice (6) CM-STATUS message sent. Event Type Code: 5; Chan ID: 42 43; 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;
Sat Mar 28 20:38:55 2026 Warning (5) MDD message timeout;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Mar 28 20:38:54 2026 Notice (6) CM-STATUS message sent. Event Type Code: 2; Chan ID: 41; 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;
Sat Mar 28 20:38:53 2026 Warning (5) MDD message timeout;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Mar 28 20:38:48 2026 Notice (6) CM-STATUS message sent. Event Type Code: 5; Chan ID: 41 42 43; 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;
Sat Mar 28 20:38:39 2026 Notice (6) CM-STATUS message sent. Event Type Code: 4; Chan ID: 32 40 41 42 43; 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;
Sat Mar 28 20:38:37 2026 Warning (5) MDD message timeout;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Mar 28 20:38:30 2026 Notice (6) CM-STATUS message sent. Event Type Code: 5; Chan ID: 43; 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;
Sat Mar 28 20:38:30 2026 Notice (6) CM-STATUS message sent. Event Type Code: 2; Chan ID: 41 42; 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;
Sat Mar 28 20:38:21 2026 Warning (5) MDD message timeout;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Mar 28 20:38:19 2026 Notice (6) CM-STATUS message sent. Event Type Code: 2; Chan ID: 41 42; 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;
Sat Mar 28 20:38:17 2026 Warning (5) MDD message timeout;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Mar 28 20:38:17 2026 Notice (6) CM-STATUS message sent. Event Type Code: 1; Chan ID: 41 42; 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;
Sat Mar 28 20:38:16 2026 Notice (6) CM-STATUS message sent. Event Type Code: 2; Chan ID: 41; 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;
Sat Mar 28 20:38:14 2026 Notice (6) CM-STATUS message sent. Event Type Code: 5; Chan ID: 41 42 43; 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;
Sat Mar 28 20:38:09 2026 Warning (5) MDD message timeout;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Mar 28 20:38:05 2026 Notice (6) CM-STATUS message sent. Event Type Code: 4; Chan ID: 32 40 42 43; 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;
Sat Mar 28 20:38:05 2026 Warning (5) MDD message timeout;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Mar 28 20:37:50 2026 Notice (6) CM-STATUS message sent. Event Type Code: 4; Chan ID: 32 40 41 42 43; 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;
Sat Mar 28 20:37:47 2026 Warning (5) MDD message timeout;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Mar 28 20:37:36 2026 Notice (6) CM-STATUS message sent. Event Type Code: 5; Chan ID: 41 42 43; 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;
Sat Mar 28 20:37:33 2026 Notice (6) CM-STATUS message sent. Event Type Code: 4; Chan ID: 32 40 41 42 43; 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;
Sat Mar 28 20:37:25 2026 Warning (5) MDD message timeout;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Mar 28 20:37:18 2026 Notice (6) CM-STATUS message sent. Event Type Code: 2; Chan ID: 41; 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;
Sat Mar 28 20:37:17 2026 Warning (5) MDD message timeout;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Mar 28 20:37:11 2026 Notice (6) CM-STATUS message sent. Event Type Code: 4; Chan ID: 32 40 41 42 43; 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;
Sat Mar 28 20:37:07 2026 Warning (5) MDD message timeout;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;
Sat Mar 28 20:37:04 2026 Notice (6) CM-STATUS message sent. Event Type Code: 5; Chan ID: 41 42 43; 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;
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BruceW
Gold Problem Solver
•
27.2K Messages
2 hours ago
Those signals are really bad, and the event log entries are in bad shape as well. Network connection problems like this are often due to poor coax connections or damaged coax cable, usually in or near your home. Running the cable through a surge protector, a defective splitter, or too many splitters can cause signal problems as well. If there is an amplifier in the line make sure it's getting power.
If you want to troubleshoot this yourself, please see Internet Troubleshooting Tips. If you can't find the problem or you'd rather have Comcast take care of it and an employee does not respond to your message here, call them at the phone number on your bill or 1-800-Comcast, or use one of the options on https://www.xfinity.com/support/contact-us/. It's not likely they can fix the problem remotely. If not, insist they send a tech out to identify the cause and correct it.
If the tech finds bad coax, splitters, amplifiers, or connections in your home (even if Comcast originally supplied them) you'll probably have to pay for the visit (approx $100) unless you have their Service Protection Plan ( https://www.xfinity.com/support/articles/service-protection-plan, closed to customers that don't already have it). If the trouble is due to a faulty Comcast rental device or anything outside your home you shouldn't be charged.
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