Community Forum

Gateway not using all channels?

Frequent Visitor

Gateway not using all channels?

Am I overlooking something? My gateway rebooted itself about 12 hours ago. I've been working over the internet, streaming videos, etc all day today but the table at the bottom (CM Codeword errors)  seems to be showing only one downstream channel being used. Only column 1 has showing any codewords at all.

 

Cable Modem

HW Version:1.0

Vendor:Cisco

BOOT Version:3.4.19.1

Core Version:3.12.14

Model:DPC3941T

Product Type:XB3

Flash Part:128 MB

Download Version:2.3.10.13_5.5.0.5

Serial Number:272244938

Downstream

Channel Bonding Value

Index

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

 

Lock Status

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

 

Frequency

519 MHz

495 MHz

501 MHz

507 MHz

513 MHz

525 MHz

531 MHz

537 MHz

543 MHz

555 MHz

561 MHz

567 MHz

573 MHz

579 MHz

585 MHz

591 MHz

597 MHz

603 MHz

609 MHz

615 MHz

621 MHz

633 MHz

651 MHz

675 MHz

 

SNR

40.366 dB

40.946 dB

40.946 dB

40.946 dB

40.946 dB

40.946 dB

40.366 dB

40.366 dB

40.946 dB

40.946 dB

40.946 dB

40.946 dB

40.946 dB

40.946 dB

40.366 dB

40.366 dB

40.946 dB

40.946 dB

40.946 dB

40.946 dB

40.366 dB

40.366 dB

40.366 dB

40.366 dB

 

Power Level

5.600 dBmV

5.500 dBmV

5.400 dBmV

5.500 dBmV

5.400 dBmV

5.400 dBmV

5.700 dBmV

5.800 dBmV

5.900 dBmV

6.500 dBmV

6.100 dBmV

6.700 dBmV

6.100 dBmV

6.500 dBmV

6.400 dBmV

6.500 dBmV

6.200 dBmV

6.300 dBmV

6.500 dBmV

6.800 dBmV

6.400 dBmV

6.700 dBmV

6.000 dBmV

6.100 dBmV

 

Modulation

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

 

Upstream

Channel Bonding Value

 

Index

1

2

3

 

 

Lock Status

Locked

Locked

Locked

 

 

Frequency

30 MHz

23 MHz

36 MHz

 

 

Symbol Rate

5120 KSym/sec

5120 KSym/sec

5120 KSym/sec

 

 

Power Level

35.750 dBmV

35.750 dBmV

35.750 dBmV

 

 

Modulation

64 QAM

64 QAM

64 QAM

 

 

Channel Type

ATDMA

ATDMA

ATDMA

 

 

                                                         

 

CM Error Codewords

Unerrored Codewords

1586935163

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

Correctable Codewords

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

Uncorrectable Codewords

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

 

Expert

Re: Gateway not using all channels?

You are misreading the graphic for the codeword chart. That column is not for a single channel. That is a cumulative total for all the codewords that have crossed the modem, not per channel. All the boxes for the individual channels show zero. All 24 of the downstream channels show that they are locked in with a frequency and a power level indication. This shows that they are indeed operational. The same goes for the 3 upstream channels.


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!
Frequent Visitor

Re: Gateway not using all channels?

So the fact that the codeword table has 24 columns and there are 24 channels is purely coincidence? What do the 24 columns on the codeword table represent then? My gateway's been up for over 3 days and and I see numbers in all of the columns now and a lot of uncorrectables too.

 

CM Error Codewords

Unerrored Codewords

3484287271

654558861

654563796

654567802

654580782

654586365

654592297

654606735

654612431

654573465

654623341

654626204

654648023

654662828

654669847

654676150

1583286571

654636591

1583289771

1583298912

1583306339

1583311191

1583321132

1583329174

Correctable Codewords

17

7

7

9

9

20

2

32

23

20

18

21

3

4

66

156

589

339

16

9

2

3

746

28

Uncorrectable Codewords

0

0

0

0

0

0

0

0

0

0

0

0

0

0

35

130

219

76

0

0

0

0

145

0

 

 

Downstream

Channel Bonding Value

Index

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

 

Lock Status

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

 

Frequency

519 MHz

495 MHz

501 MHz

507 MHz

513 MHz

525 MHz

531 MHz

537 MHz

543 MHz

555 MHz

561 MHz

567 MHz

573 MHz

579 MHz

585 MHz

591 MHz

597 MHz

603 MHz

609 MHz

615 MHz

621 MHz

633 MHz

651 MHz

675 MHz

 

SNR

40.946 dB

40.366 dB

40.366 dB

40.366 dB

40.366 dB

40.366 dB

40.366 dB

40.366 dB

40.366 dB

40.946 dB

40.946 dB

40.946 dB

40.946 dB

40.366 dB

40.946 dB

40.366 dB

40.366 dB

40.946 dB

40.946 dB

40.946 dB

40.946 dB

40.366 dB

40.366 dB

40.366 dB

 

Power Level

5.700 dBmV

5.400 dBmV

5.300 dBmV

5.400 dBmV

5.300 dBmV

5.600 dBmV

6.000 dBmV

6.100 dBmV

6.400 dBmV

6.800 dBmV

6.500 dBmV

7.100 dBmV

6.600 dBmV

7.100 dBmV

7.000 dBmV

7.100 dBmV

7.000 dBmV

7.000 dBmV

7.100 dBmV

7.300 dBmV

6.900 dBmV

7.100 dBmV

6.800 dBmV

6.500 dBmV

 

Modulation

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

256 QAM

 

 

Expert

Re: Gateway not using all channels?

The signal stats are all well within spec and the uncorrectable errors are very low.



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!