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Acie6134
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Frequent Visitor

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13 Messages

Thursday, June 13th, 2024 6:02 PM

Internet drops intermittently throughout the day

For the past few weeks my connection has been intermittently dropping, repeatedly. I've noticed that it usually starts in the afternoon, and will be unstable thereafter.

I've tried restarting modem/router, using the Xfinity Troubleshoot, but nothing works. Xfinity says there's no outages in my area either.

This happens over both WiFi and wired connections.

The modem connects straight into the wall in my house, and there are no other devices in the house using COAX besides the modem.

Any help would be appreciated.

Modem: Netgear CM1100

Event logs:

Time

Priority

Description

2024-06-13, 18:03:28

Notice (6)

CM-STATUS message sent. Event Type Code: 24; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1.;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

2024-06-13, 18:01:21

Notice (6)

CM-STATUS message sent. Event Type Code: 16; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1 3.;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

2024-06-13, 18:00:57

Notice (6)

CM-STATUS message sent. Event Type Code: 16; Chan ID: 48; 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;

2024-06-13, 17:54:35

Notice (6)

CM-STATUS message sent. Event Type Code: 24; Chan ID: 48; 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;

2024-06-13, 17:51:03

Notice (6)

CM-STATUS message sent. Event Type Code: 16; Chan ID: 48; 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;

2024-06-13, 17:49:15

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;

2024-06-13, 16:41:16

Notice (6)

CM-STATUS message sent. Event Type Code: 24; Chan ID: 48; 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;

2024-06-13, 16:39:11

Notice (6)

CM-STATUS message sent. Event Type Code: 16; Chan ID: 48; 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;

2024-06-13, 16:38:54

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;

2024-06-13, 16:27:28

Warning (5)

Dynamic Range Window violation

2024-06-13, 16:27:28

Warning (5)

RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

2024-06-13, 16:22:58

Notice (6)

CM-STATUS message sent. Event Type Code: 24; Chan ID: 48; 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;

2024-06-13, 16:21:48

Warning (5)

Dynamic Range Window violation

2024-06-13, 16:21:48

Warning (5)

RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

2024-06-13, 16:20:30

Notice (6)

CM-STATUS message sent. Event Type Code: 16; Chan ID: 48; 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;

2024-06-13, 07:50:08

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;

2024-06-13, 07:08:42

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;

Time Not Established

Notice (6)

Honoring MDD; IP provisioning mode = IPv6

Time Not Established

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;

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;

2024-06-13, 07:07:32

Critical (3)

Resetting the cable modem due to docsDevResetNow

2024-06-13, 06:51:23

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;

2024-06-13, 05:49:00

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;

2024-06-13, 05:19:18

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;

2024-06-13, 05:19:17

Critical (3)

16 consecutive T3 timeouts while trying to range on upstream channel 1;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

2024-06-13, 05:19:17

Critical (3)

Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

2024-06-13, 05:18:09

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;

2024-06-13, 04:34:21

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;

2024-06-13, 04:24:50

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;

2024-06-13, 03:31:31

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;

2024-06-13, 02:53:21

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;

2024-06-13, 02:43:48

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;

2024-06-13, 02:39:58

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;

2024-06-13, 02:15:13

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;

2024-06-13, 01:31:23

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;

2024-06-12, 23:39:11

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;

2024-06-12, 19:37:46

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;

2024-06-12, 19:31:43

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;

2024-06-12, 19:31:41

Critical (3)

16 consecutive T3 timeouts while trying to range on upstream channel 1;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

2024-06-12, 19:31:41

Critical (3)

Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

Procedure

Status

Comment

Acquire Downstream Channel

459000000 Hz

Locked

Connectivity State

OK

Operational

Boot State

OK

Operational

Security

Enable

BPI+

IP Provisioning Mode

Honor MDD

IPv6 only

 

 

<tabindex=-1>Downstream Bonded Channels</tabindex=-1>

Channel

Lock Status

Modulation

Channel ID

Frequency

Power

SNR / MER

Unerrored Codewords

Correctable Codewords

Uncorrectable Codewords

1

Locked

QAM256

20

459000000 Hz

2.5 dBmV

38.1 dB

1777627240

4033

4577

2

Locked

QAM256

17

441000000 Hz

2.7 dBmV

38.0 dB

1776512173

4468

4733

3

Locked

QAM256

18

447000000 Hz

2.6 dBmV

38.2 dB

1776502223

4386

4603

4

Locked

QAM256

19

453000000 Hz

2.6 dBmV

38.2 dB

1776518453

4208

4669

5

Locked

QAM256

21

465000000 Hz

2.7 dBmV

38.1 dB

1776522772

4057

4354

6

Locked

QAM256

22

471000000 Hz

2.7 dBmV

38.1 dB

1776526071

3865

4546

7

Locked

QAM256

23

477000000 Hz

2.8 dBmV

38.0 dB

1776530420

3878

4335

8

Locked

QAM256

24

483000000 Hz

2.6 dBmV

38.2 dB

1776534320

3887

3997

9

Locked

QAM256

25

489000000 Hz

2.6 dBmV

38.0 dB

1776537712

3657

4090

10

Locked

QAM256

26

495000000 Hz

2.6 dBmV

38.1 dB

1776542107

3403

4303

11

Locked

QAM256

27

501000000 Hz

2.6 dBmV

38.2 dB

1776546494

3400

4171

12

Locked

QAM256

28

507000000 Hz

2.6 dBmV

37.9 dB

1776548879

3389

4194

13

Locked

QAM256

29

513000000 Hz

2.6 dBmV

38.0 dB

1776553299

3195

4027

14

Locked

QAM256

30

519000000 Hz

2.6 dBmV

38.1 dB

1776557292

3368

3747

15

Locked

QAM256

31

525000000 Hz

2.7 dBmV

38.2 dB

1776561838

3014

3728

16

Locked

QAM256

32

531000000 Hz

2.6 dBmV

38.2 dB

1776565079

2974

3892

17

Locked

QAM256

33

537000000 Hz

2.6 dBmV

38.2 dB

1776568637

2971

3839

18

Locked

QAM256

34

543000000 Hz

2.4 dBmV

37.8 dB

1776572219

3068

3660

19

Locked

QAM256

35

549000000 Hz

2.3 dBmV

38.1 dB

1776576415

2718

3595

20

Locked

QAM256

36

555000000 Hz

2.2 dBmV

37.9 dB

1776581231

2636

3391

21

Locked

QAM256

37

561000000 Hz

2.5 dBmV

38.2 dB

1776584470

2688

3545

22

Locked

QAM256

38

567000000 Hz

2.4 dBmV

38.2 dB

1776588088

2404

3397

23

Locked

QAM256

39

573000000 Hz

2.4 dBmV

38.3 dB

1776592483

2262

3178

24

Locked

QAM256

40

579000000 Hz

2.4 dBmV

38.2 dB

1776595913

2380

3169

25

Locked

QAM256

41

585000000 Hz

2.5 dBmV

38.3 dB

1776600227

2157

3134

26

Locked

QAM256

42

591000000 Hz

2.5 dBmV

38.1 dB

1776604822

2057

3075

27

Locked

QAM256

43

597000000 Hz

2.7 dBmV

38.4 dB

1776608012

1987

2984

28

Locked

QAM256

44

603000000 Hz

2.8 dBmV

38.3 dB

1776611512

1969

2857

29

Locked

QAM256

45

609000000 Hz

2.7 dBmV

38.3 dB

1776613603

1961

2882

30

Locked

QAM256

46

615000000 Hz

2.7 dBmV

38.3 dB

1776617657

1890

2820

31

Locked

QAM256

47

621000000 Hz

2.8 dBmV

38.2 dB

1776620991

1716

2798

32

Not Locked

Unknown

0

0 Hz

0.0 dBmV

0.0 dB

0

0

0

<tabindex=-1>Upstream Bonded Channels</tabindex=-1>

Channel

Lock Status

Modulation

Channel ID

Frequency

Power

1

Locked

ATDMA

5

16400000 Hz

47.8 dBmV

2

Locked

ATDMA

6

22800000 Hz

47.8 dBmV

3

Locked

ATDMA

7

29200000 Hz

48.3 dBmV

4

Locked

ATDMA

8

35600000 Hz

48.8 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

<tabindex=-1>Downstream OFDM Channels</tabindex=-1>

Channel

Lock Status

Modulation / Profile ID

Channel ID

Frequency

Power

SNR / MER

Active Subcarrier Number Range

Unerrored Codewords

Correctable Codewords

Uncorrectable Codewords

1

Locked

0, 1, 2, 3

48

685000000 Hz

3.7 dBmV

36.8 dB

988 ~ 3107

617177531

616336077

494

2

Not Locked

0

0

0 Hz

0.4 dBmV

0.0 dB

0 ~ 4095

0

0

0
<tabindex=-1>Upstream OFDMA Channels</tabindex=-1>
Channel Lock Status Modulation / Profile ID Channel ID Frequency Power
1 Not Locked Unknown 0 0 Hz 0 dBmV
2 Not Locked Unknown 0 0 Hz 0 dBmV

Question

 • 

Updated 

3 months ago

 • Edited

77

4

Was this helpful?

Acie6134

Frequent Visitor

 • 

13 Messages

5 months ago

I've been reading some other threads and it seems like my power levels are very high, is that the cause of all these issues? If so, how can I lower them?

0

0

EG

Expert

 • 

107.2K Messages

5 months ago

This may or may not be the root cause of the problem (YMMV) but it should be addressed regardless.

Yes. The upstream power is indeed on the high side and it may be intermittently fluctuating even higher to out-of-spec levels. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels.

In an effort to try to obtain better connectivity / more wiggle room, check to see if there are any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage from Home Depot, Target, Wal-Mart, etc. Splitters should be swapped with known to be good / new ones to test.

Also check the coax cable for any damage such as cuts, nicks, abrasions, kinks, sharp bends, etc.

If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two-way splitter connected directly off of the drop from the street / pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.

(edited)

2

Acie6134

Frequent Visitor

 • 

13 Messages

I don't think there are any splitters in the line to the modem, and I'm using a xfinity provided coax cable. 

It's 4:30 PM now and it's started disconnecting every few minutes again. Can't hold a steady connection for any longer than 3 or 4 minutes at a time.

Since it's based off time, does this mean there's someone in my neighborhood sabotaging xfinity networks daily in the afternoon? 

Like

Reply

5 months ago

0

Acie6134

Frequent Visitor

 • 

13 Messages

New power readings now with my internet dropping every minute:

<tabindex=-1>Startup Procedure</tabindex=-1>
Procedure Status Comment
Acquire Downstream Channel 459000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Security Enable BPI+
IP Provisioning Mode Honor MDD IPv6 only
<tabindex=-1>Downstream Bonded Channels</tabindex=-1>
Channel Lock Status Modulation Channel ID Frequency Power SNR / MER Unerrored Codewords Correctable Codewords Uncorrectable Codewords
1 Locked QAM256 20 459000000 Hz 2.1 dBmV 37.9 dB 2711615746 60712 38707
2 Locked QAM256 17 441000000 Hz 2.3 dBmV 38.1 dB 2710496259 65139 41722
3 Locked QAM256 18 447000000 Hz 2.3 dBmV 38.1 dB 2710488456 63824 39817
4 Locked QAM256 19 453000000 Hz 2.2 dBmV 38.1 dB 2710507017 61683 40133
5 Locked QAM256 21 465000000 Hz 2.3 dBmV 38.3 dB 2710515705 59118 37776
6 Locked QAM256 22 471000000 Hz 2.2 dBmV 38.2 dB 2710518892 59499 37552
7 Locked QAM256 23 477000000 Hz 2.3 dBmV 38.1 dB 2710526981 56838 35430
8 Locked QAM256 24 483000000 Hz 2.1 dBmV 38.2 dB 2710534805 56579 33062
9 Locked QAM256 25 489000000 Hz 2.1 dBmV 38.1 dB 2710540842 54271 31992
10 Locked QAM256 26 495000000 Hz 2.0 dBmV 37.9 dB 2710543952 53882 32946
11 Locked QAM256 27 501000000 Hz 2.1 dBmV 38.2 dB 2710551087 52213 31827
12 Locked QAM256 28 507000000 Hz 2.1 dBmV 38.1 dB 2710555551 51037 31189
13 Locked QAM256 29 513000000 Hz 2.0 dBmV 38.1 dB 2710562077 48924 30149
14 Locked QAM256 30 519000000 Hz 2.1 dBmV 38.1 dB 2710570311 48155 27329
15 Locked QAM256 31 525000000 Hz 2.1 dBmV 38.2 dB 2710577086 46491 26035
16 Locked QAM256 32 531000000 Hz 2.0 dBmV 38.0 dB 2710581785 44985 27222
17 Locked QAM256 33 537000000 Hz 2.0 dBmV 38.1 dB 2710587695 42748 26517
18 Locked QAM256 34 543000000 Hz 1.7 dBmV 38.0 dB 2710591316 43018 25019
19 Locked QAM256 35 549000000 Hz 1.7 dBmV 38.0 dB 2710599795 40882 23367
20 Locked QAM256 36 555000000 Hz 1.6 dBmV 38.0 dB 2710605975 39737 22547
21 Locked QAM256 37 561000000 Hz 1.8 dBmV 38.3 dB 2710612200 37553 22246
22 Locked QAM256 38 567000000 Hz 1.7 dBmV 38.2 dB 2710619733 34989 20913
23 Locked QAM256 39 573000000 Hz 1.7 dBmV 38.2 dB 2710624808 34289 20056
24 Locked QAM256 40 579000000 Hz 1.6 dBmV 38.2 dB 2710629029 33513 19665
25 Locked QAM256 41 585000000 Hz 1.6 dBmV 38.3 dB 2710636133 32036 18369
26 Locked QAM256 42 591000000 Hz 1.7 dBmV 38.2 dB 2710643028 30415 17926
27 Locked QAM256 43 597000000 Hz 1.9 dBmV 38.4 dB 2710648210 29364 16753
28 Locked QAM256 44 603000000 Hz 1.9 dBmV 38.4 dB 2710654034 27847 16413
29 Locked QAM256 45 609000000 Hz 1.9 dBmV 38.4 dB 2710655411 27125 16499
30 Locked QAM256 46 615000000 Hz 1.8 dBmV 38.2 dB 2710662028 25634 15417
31 Locked QAM256 47 621000000 Hz 2.0 dBmV 38.3 dB 2710666831 25126 15310
32 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 0
<tabindex=-1>Upstream Bonded Channels</tabindex=-1>
Channel Lock Status Modulation Channel ID Frequency Power
1 Locked ATDMA 5 16400000 Hz 47.5 dBmV
2 Locked ATDMA 6 22800000 Hz 47.5 dBmV
3 Locked ATDMA 7 29200000 Hz 48.0 dBmV
4 Locked ATDMA 8 35600000 Hz 59.0 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
<tabindex=-1>Downstream OFDM Channels</tabindex=-1>
Channel Lock Status Modulation / Profile ID Channel ID Frequency Power SNR / MER Active Subcarrier Number Range Unerrored Codewords Correctable Codewords Uncorrectable Codewords
1 Locked 0, 1, 2, 3 48 685000000 Hz 2.8 dBmV 36.8 dB 988 ~ 3107 1098450831 1093906152 7636
2 Not Locked 0 0 0 Hz 0.6 dBmV 0.0 dB 0 ~ 4095 0 0 0
<tabindex=-1>Upstream OFDMA Channels</tabindex=-1>
Channel Lock Status Modulation / Profile ID Channel ID Frequency Power
1 Not Locked Unknown 0 0 Hz 0 dBmV
2 Not Locked Unknown 0 0 Hz 0 dBmV

(edited)

Like

Reply

5 months ago

EG

Expert

 • 

107.2K Messages

5 months ago

@Acie6134 

Wow, The problem got worse. Upstream channel #4 is now way out of spec !!

4 Locked ATDMA 8 35600000 Hz 59.0 dBmV

Something intermittent is going on ! If there is nothing more that can be done to improve the connection quality, then you'll need a tech visit as stated. 


Bear in mind that if the premises facing techs can not find or fix a problem at your home, it is they who are responsible for escalating it up to their line / network / maintenance dept. techs. The problem may lie beyond your home in the local neighborhood infrastructure somewhere but it is their S.O.P. to start at the home. And if the problem is found to be on their side of the demarcation point, there will not be any charge.


Good luck !

(edited)

0

Acie6134

Frequent Visitor

 • 

13 Messages

3 months ago

A xfinity tech came and it fixed the problem for a bit but it's been progressively getting worse everyday to the point where my internet is nearly unusable from 3-11PM everyday. It never happens in the morning, only afternoon and nights. I strongly believe my neighbor's vehicle has some sort of electromagnetic interference that's causing this. Everyday when he gets home from work my modem's upstream powerlevels go > 53.

Cable Connection
 
Apply             Cancel    
Frequency start Value
This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect.
Starting Frequency
<tabindex=-1>Startup Procedure</tabindex=-1>
Procedure Status Comment
Acquire Downstream Channel 459000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Security Enable BPI+
IP Provisioning Mode Honor MDD IPv6 only
<tabindex=-1>Downstream Bonded Channels</tabindex=-1>
Channel Lock Status Modulation Channel ID Frequency Power SNR / MER Unerrored Codewords Correctable Codewords Uncorrectable Codewords
1 Locked QAM256 20 459000000 Hz 0.8 dBmV 38.5 dB 24843214 39 81
2 Locked QAM256 17 441000000 Hz 0.9 dBmV 38.6 dB 23762524 72 83
3 Locked QAM256 18 447000000 Hz 0.9 dBmV 38.8 dB 23752484 20 100
4 Locked QAM256 19 453000000 Hz 0.9 dBmV 38.6 dB 23768528 30 119
5 Locked QAM256 21 465000000 Hz 1.0 dBmV 38.5 dB 23772327 36 119
6 Locked QAM256 22 471000000 Hz 0.9 dBmV 38.7 dB 23776057 61 102
7 Locked QAM256 23 477000000 Hz 0.9 dBmV 38.7 dB 23779901 30 98
8 Locked QAM256 24 483000000 Hz 0.8 dBmV 38.4 dB 23783450 26 96
9 Locked QAM256 25 489000000 Hz 0.8 dBmV 38.5 dB 23787316 24 126
10 Locked QAM256 26 495000000 Hz 0.8 dBmV 38.6 dB 23790855 48 111
11 Locked QAM256 27 501000000 Hz 0.9 dBmV 38.6 dB 23794539 17 99
12 Locked QAM256 28 507000000 Hz 0.9 dBmV 38.7 dB 23798166 27 128
13 Locked QAM256 29 513000000 Hz 0.9 dBmV 38.7 dB 23802358 36 116
14 Locked QAM256 30 519000000 Hz 0.8 dBmV 38.8 dB 23805988 18 119
15 Locked QAM256 31 525000000 Hz 0.8 dBmV 38.8 dB 23809519 23 103
16 Locked QAM256 32 531000000 Hz 0.7 dBmV 38.7 dB 23813334 28 101
17 Locked QAM256 33 537000000 Hz 0.8 dBmV 38.7 dB 23817056 24 87
18 Locked QAM256 34 543000000 Hz 0.5 dBmV 38.7 dB 23820995 35 93
19 Locked QAM256 35 549000000 Hz 0.4 dBmV 38.6 dB 23824437 27 100
20 Locked QAM256 36 555000000 Hz 0.3 dBmV 38.7 dB 23828060 23 108
21 Locked QAM256 37 561000000 Hz 0.6 dBmV 38.8 dB 23831986 18 115
22 Locked QAM256 38 567000000 Hz 0.4 dBmV 39.0 dB 23835866 47 74
23 Locked QAM256 39 573000000 Hz 0.4 dBmV 38.9 dB 23839429 15 90
24 Locked QAM256 40 579000000 Hz 0.3 dBmV 38.9 dB 23843204 35 91
25 Locked QAM256 41 585000000 Hz 0.5 dBmV 39.0 dB 23847098 24 104
26 Locked QAM256 42 591000000 Hz 0.5 dBmV 38.9 dB 23850618 26 98
27 Locked QAM256 43 597000000 Hz 0.7 dBmV 39.1 dB 23854176 23 103
28 Locked QAM256 44 603000000 Hz 0.7 dBmV 39.1 dB 23857960 48 92
29 Locked QAM256 45 609000000 Hz 0.7 dBmV 39.1 dB 23861971 44 75
30 Locked QAM256 46 615000000 Hz 0.6 dBmV 39.0 dB 23878026 16 64
31 Locked QAM256 47 621000000 Hz 0.6 dBmV 39.0 dB 23868056 25 75
32 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 0
<tabindex=-1>Upstream Bonded Channels</tabindex=-1>
Channel Lock Status Modulation Channel ID Frequency Power
1 Locked ATDMA 5 16400000 Hz 49.8 dBmV
2 Locked ATDMA 6 22800000 Hz 49.0 dBmV
3 Locked ATDMA 7 29200000 Hz 53.8 dBmV
4 Locked ATDMA 8 35600000 Hz 49.8 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
<tabindex=-1>Downstream OFDM Channels</tabindex=-1>
Channel Lock Status Modulation / Profile ID Channel ID Frequency Power SNR / MER Active Subcarrier Number Range Unerrored Codewords Correctable Codewords Uncorrectable Codewords
1 Locked 0, 1, 2, 3 48 685000000 Hz 1.5 dBmV 37.5 dB 988 ~ 3107 11468265 11431486 7
2 Not Locked 0 0 0 Hz -1.1 dBmV 0.0 dB 0 ~ 4095 0 0 0
<tabindex=-1>Upstream OFDMA Channels</tabindex=-1>
Channel Lock Status Modulation / Profile ID Channel ID Frequency Power
1 Not Locked Unknown 0 0 Hz 0 dBmV
2 Not Locked Unknown 0 0 Hz 0 dBmV
Current System Time: Mon Sep 02 14:14:32 2024
System Up Time: 0:09:26
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