Basic Internet Connectivity And Modem Help

[Covas12d]

Same issue, dropped connections for last few days.

Cable Modem Upstream

 

US-1

US-2

US-3

US-4

Channel Type

2.0

N/A

2.0

1.0

Channel ID

10

N/A

11

12

Frequency
(Hz)

34800000

N/A

27900000

22600000

Ranging Status

Success

N/A

Success

Success

Modulation

64QAM

N/A

64QAM

16QAM

Symbol Rate
(KSym/sec)

5120

N/A

5120

2560

Mini-Slot Size

4

N/A

4

4

Power Level
(dBmV)

45.50

N/A

44.75

44.25

T1 Timeouts

0

0

0

0

T2 Timeouts

0

0

0

0

T3 Timeouts

0

0

0

0

T4 Timeouts

0

0

0

0

Cable Modem Downstream

 

DS-1

DS-2

DS-3

DS-4

Frequency

669000000

675000000

699000000

705000000

Lock Status
(QAM Lock/FEC Sync/MPEG Lock)

Y/Y/Y

Y/Y/Y

Y/Y/Y

Y/Y/Y

Channel Id

2

3

7

8

Modulation

256QAM

256QAM

256QAM

256QAM

Symbol Rate
(Msym/sec)

5.360537

5.360537

5.360537

5.360537

Interleave Depth

I=32
J=4

I=32
J=4

I=32
J=4

I=32
J=4

Power Level
(dBmV)

3.67

3.27

2.66

2.29

RxMER
(d

35.97

36.17

36.17

35.97

Correctable
Codewords

16

0

0

0

Uncorrectable
Codewords

1523

1354

1530

1442

 

[EG]

No smoking guns there in that snapshot in time if they are remaining stable, sorry.

What is the exact make and model number of the modem ?

There are two additional signal stats which can't be read at the modem level. They can only be read from their end by them polling the CMTS (Cable Modem Termination System) at the local headend facility.

They are the 'Upstream Receive Power Level' and the 'Upstream uSNR' (upstream Signal To Noise Ratio). Both of these are as equally important in diagnosing connectivity issues as are the modem's stats.

You can call in and ask what these figures are. The Upstream Receive Power Level should fall within the range of -10dB to +10dB with 0dB being in the middle and perfect.

The Upstream SNR should be least 30dB, and the higher it is the better. You could have a noise ingress issue in the upstream channel.