Docsis chat

Hi

We noticed an message from one of our providers that on May 2021 we could
have problems with cable modems to complete BPI+ authentication. I attach information

How can I know which is the expiration date of the cable modem certificate?

I am attentive to your responses, Thanks

regards

Hi

I have a C100G Chassis and I want to know if you can use slot 5 and 8 that in the back have a different shape than the rest of the slot

I plan to connect a downstream module in slot 5 and an upstream module in slot 8

attached image of the back of slot 8, it is the same as slot 5.
Next to it is slot 9 and you can see the difference

I attach an image of the RF I / O card of an upstream module.

I want to connect this card in slot 8, to use this slot with an upstream module and to be able to use more upstream ports.

I am working with a SEM v12 which has been in service about 8 years. Output 1A recently went to a low level which we added an amp to compensate. All the inputs come in through the GigE ports 1 & 2. But now a bunch of inputs (not all) stopped working on the GigE 2 input. Input status on those shows no data.
Got another unit used, configured it the same and No inputs show data in. Can not get the Enet2 port to open and show data either. The front panel output lights have no green or red indications either.

Hello All,

Here is the scenario:

CM's diplexer HW supports the below:
1. 5 – 85 MHz US, 108 – 1218 MHz DS
2. 5 – 204 MHz US, 254 – 1218 MHz DS

====
CMTS configurations:
US: 4 SC-QAM + 1 OFDMA
us-channel 1 frequency 16510000
us-channel 2 frequency 23010000
us-channel 3 frequency 29510000
us-channel 4 frequency 36010000
us-channel 12 frequency 45000000 141000000

DS is configured from 303 MHz onwards.
====

Hello all
there are several docsis3.0 and older CM out in the net with expiring Manufacturer's CA certificate within the next two years.
One of these are Thomson THG570 and THG571. (expire at 2022-12-12)
Does anybody know if Technicolor/Thomson will create a new firmware with a new cert?
Thank you

I was reading in a whitepaper that it may be possible to pull the return spectrum data kind of like you can get from the modems for the forward through Full Band Capture.

Does anyone have any information regarding how you would do this?

Also, I have cobbled together my own code to poll/parse/display the full band capture data but have had to do so without any real documentation whatsoever, so if anyone has anything related to that as well, I would greatly appreciate it.

Thanks!

Hi

I ask for help to have OID snmp to change wifi password in cable modem cisco DPC3825

regards

Why would modems have low TX power if the return path has correct levels?

One of our nodes is experiencing a lot of issues with upstream performance. Modems on that node report good downstream RX power +/- 3dB, but upstream TX power is around 35dB. Majority of modems are Cisco DPC3825 and CMTS is a BSR 64k. SNR for the upstream channels on that node is very poor - hovering around 25dB.

Hi

Please help me, I want to graph the percentage of use of the downstream and upstream channels of a CMTS C100G Casa Systems

What are the snmp OIDs to graph

show docsis upstream channel utilization
show docsis downstream channel utilization

Certain cable modems will be unavailable from Cisco 10k CMTS. In principle, they are online, but they cannot be pinged, they do not respond to ip. However, if I try to "ping docsis MAC_ADDR", there will be an answer. After a modem restart, the tcp connection starts, but it only works for 10-20 minutes. :( Mostly affects modems, Arris type. If I replace cable modes with another one in the same place, it will work. :( What can cause such an error?
Regards!