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intermittent signal

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New Poster

intermittent signal

I'm getting alot of intermittent issues when I sign into work through their VPN. But when i'm not on, everything seems fine. Is there something wrong with my settings? Can someone help? Every 10 mins my modem just cycles through the signal, just seems to reboot.

 

07/21/2020 12:55820004003"Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:55820007003"Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:55820004003"Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:54820007003"Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:54820004003"Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:53820007003"Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:53820004003"Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:53820007003"Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:52820004003"Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:52820007003"Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:51820004003"Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:51820007003"Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:51820004003"Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:50820007003"Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:50820004003"Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:49820007003"Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:49820004003"Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:49820007003"Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:48740101006"CM-STATUS message sent. Event Type Code: 6; Chan ID: 3; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:48820004003"Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:48820007003"Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:48820004003"Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:47820007003"Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:4624366940666"Honoring MDD; IP provisioning mode = IPv6"
07/21/2020 12:46820004003"Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:46820002003"No Ranging Response received - T3 time-out;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:46820004003"Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:44820005003"Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:3924366940615"Dynamic Range Window violation"
07/21/2020 12:39820012005"RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:39820005003"Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:3924366940615"Dynamic Range Window violation"
07/21/2020 12:39820012005"RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:3924366940615"Dynamic Range Window violation"
07/21/2020 12:39820012005"RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:3924366940615"Dynamic Range Window violation"
07/21/2020 12:39820012005"RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:3924366940615"Dynamic Range Window violation"
07/21/2020 12:39820011005"RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:3924366940615"Dynamic Range Window violation"
07/21/2020 12:39820011005"RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:3924366940615"Dynamic Range Window violation"
07/21/2020 12:39820011005"RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:39820005003"Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:38820004003"Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:38820007003"Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:38820004003"Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:37820007003"Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:37820004003"Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"
07/21/2020 12:36820007003"Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=8c:61:a3:c6:56:95;CMTS-MAC=94:d4:69:54:8f:90;CM-QOS=1.1;CM-VER=3.1;"

 
 

 
 
 
 
 

 

Highlighted
Expert

Re: intermittent signal

Please also post the *Downstream Power Level*, the *Upstream Power Level*, and the *SNR* (Signal to Noise Ratio) numbers.




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Highlighted
New Poster

Re: intermittent signal

Channel ID

Lock Status

Modulation

Frequency

Power

SNR/MER

Corrected

Uncorrectables

25

Locked

QAM256

615000000 Hz

1.6 dBmV

38.0 dB

0

0

5

Locked

QAM256

483000000 Hz

3.9 dBmV

39.4 dB

0

0

6

Locked

QAM256

489000000 Hz

4.6 dBmV

39.6 dB

0

0

7

Locked

QAM256

495000000 Hz

4.0 dBmV

39.2 dB

0

0

8

Locked

QAM256

507000000 Hz

5.1 dBmV

39.4 dB

0

0

9

Locked

QAM256

513000000 Hz

4.9 dBmV

39.5 dB

0

0

10

Locked

QAM256

519000000 Hz

3.7 dBmV

39.1 dB

0

0

11

Locked

QAM256

525000000 Hz

3.0 dBmV

38.8 dB

0

0

12

Locked

QAM256

531000000 Hz

3.2 dBmV

38.9 dB

0

0

13

Locked

QAM256

543000000 Hz

4.5 dBmV

39.3 dB

0

0

14

Locked

QAM256

549000000 Hz

2.7 dBmV

38.6 dB

0

0

15

Locked

QAM256

555000000 Hz

2.7 dBmV

38.6 dB

0

0

16

Locked

QAM256

561000000 Hz

2.5 dBmV

38.6 dB

0

0

17

Locked

QAM256

567000000 Hz

2.3 dBmV

38.5 dB

0

0

18

Locked

QAM256

573000000 Hz

2.1 dBmV

38.4 dB

0

0

19

Locked

QAM256

579000000 Hz

2.2 dBmV

38.5 dB

0

0

20

Locked

QAM256

585000000 Hz

2.7 dBmV

38.6 dB

0

0

21

Locked

QAM256

591000000 Hz

1.8 dBmV

38.2 dB

0

0

22

Locked

QAM256

597000000 Hz

0.7 dBmV

37.9 dB

0

0

23

Locked

QAM256

603000000 Hz

1.2 dBmV

38.0 dB

0

0

24

Locked

QAM256

609000000 Hz

1.7 dBmV

38.1 dB

0

0

26

Locked

QAM256

621000000 Hz

1.3 dBmV

37.9 dB

0

0

27

Locked

QAM256

627000000 Hz

1.2 dBmV

37.8 dB

0

0

28

Locked

QAM256

633000000 Hz

1.6 dBmV

38.1 dB

0

0

29

Locked

QAM256

639000000 Hz

1.7 dBmV

38.0 dB

0

0

30

Locked

QAM256

645000000 Hz

0.2 dBmV

37.4 dB

0

0

31

Locked

QAM256

651000000 Hz

-0.6 dBmV

37.0 dB

0

0

32

Locked

QAM256

657000000 Hz

1.2 dBmV

37.8 dB

0

0

33

Locked

QAM256

663000000 Hz

0.8 dBmV

37.7 dB

0

0

34

Locked

QAM256

669000000 Hz

0.1 dBmV

37.4 dB

0

0

35

Locked

QAM256

675000000 Hz

-0.5 dBmV

36.6 dB

0

0

36

Locked

QAM256

681000000 Hz

0.0 dBmV

37.5 dB

0

0

159

Locked

Other

722000000 Hz

-1.3 dBmV

35.5 dB

5193511

0

 

 

Upstream Bonded Channels

Channel

Channel ID

Lock Status

US Channel Type

Frequency

Width

Power

1

2

Locked

SC-QAM Upstream

36500000 Hz

6400000 Hz

57.0 dBmV

2

1

Locked

SC-QAM Upstream

30100000 Hz

6400000 Hz

58.0 dBmV

3

3

Locked

SC-QAM Upstream

17300000 Hz

6400000 Hz

58.0 dBmV

4

4

Locked

SC-QAM Upstream

23700000 Hz

6400000 Hz

58.0 dBmV

 

Highlighted
Expert

Re: intermittent signal

The upstream power is WAY out of spec ! That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels.

In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there 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 types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart etc. Splitters should be swapped with known to be good / new ones to test

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.



I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark the post as Best Answer!