Modem Missing Downstream Channels/Ports

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I Plan to Stick Around
Posts: 14

Modem Missing Downstream Channels/Ports

Anyone have any idea why my Coda-4582U is all of a sudden missing a bunch of downstream channels? I also have an RCS Partial Service warning in my logs. Strangely, internet is working fine; speeds and latency are as expected.

 

Downstream Overview

Port ID Frequency (MHz) Modulation Signal strength (dBmV) Channel ID Signal noise ratio (dB)
1 633000000 256QAM 2.100 13 38.605
10 609000000 256QAM 2.500 10 38.983
11 615000000 256QAM 2.500 11 38.983
12 621000000 256QAM 2.400 12 38.983
13 555000000 256QAM 2.000 1 38.983
14 639000000 256QAM 2.000 14 38.605
15 645000000 256QAM 1.800 15 38.605
16 651000000 256QAM 1.800 16 38.983
17 657000000 256QAM 1.700 17 38.605
18 663000000 256QAM 1.500 18 38.605
19 669000000 256QAM 1.800 19 38.983
20 675000000 256QAM 1.500 20 38.605
21 681000000 256QAM 1.600 21 38.983
22 687000000 256QAM 1.400 22 38.605
23 693000000 256QAM 1.100 23 38.605
24 699000000 256QAM 1.000 24 38.605
25 705000000 256QAM 0.700 25 38.605
26 711000000 256QAM 0.500 26 38.605
27 717000000 256QAM 0.000 27 38.605
28 723000000 256QAM -0.100 28 37.636
29 729000000 256QAM -0.200 29 37.636
30 735000000 256QAM -0.300 30 37.636
31 741000000 256QAM -0.600 31 37.356

 

 

 

***Edited Labels***

I Plan to Stick Around
Posts: 40

Re: Modem Missing Downstream Channels/Ports

I think that is normal. Your signal strength is good. My modem looks the same

I Plan to Stick Around
Posts: 74

Re: Modem Missing Downstream Channels/Ports

Usually a power reset to the Coda will bring back the missing channels/ports.

I Plan to Stick Around
Posts: 14

Re: Modem Missing Downstream Channels/Ports

Up until 2 days ago, I had all 32 channels showing in the downstream table so I'm not sure it's normal. Obviously it doesn't seem to be affecting my service but I'm curious none the less.

 

I did try resetting/power cycling the modem but it's still missing those channels and upon each reboot, this message gets logged:

 

2005/05/2018 16:32:1084000700warningRCS Partial Service;CM-MAC=xxxxxxxx;CMTS-MACxxxxxxxxxxx;CM-QOS=1.1;CM-VER=3.1;
Retired Moderator RogersCilio
Retired Moderator
Posts: 390

Re: Modem Missing Downstream Channels/Ports

Hey @Dascombe,

 

It's definitely not normal, especially considering the fact that you're not feeling any impact to your service. Have you tried factory restoring the modem with the pin hole button located on the back?

 

I'm of the old adage, if it ain't broke, don't fix it...however, if you start to notice your service degrading, I'd go with a modem swap first and foremost. For now, I'd say keep an eye on it. 

 

Community, feel free to chime in :).

 

Cheers,

RogersCilio