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Forum Discussion
So_tired
Aug 08, 2025Guide
MDD message timeout,CM-STATUS Event Type Code: 4, & Unicast Maintenance Ranging timeouts.
Hello, I am NOW having issues with my new (CM2500) mid/high modem. I've been having latency issues, time outs, disconnects for awhile now, ever since Comcast 'upgraded' the internet in my area. I...
- Aug 15, 2025
I ended up getting a CAT6 STP cable and an Xfinity Gateway in bridge mode.
EVERYTHING LOOKS GREAT!!! im so friggen happy, finally, omg lol
Thank you for all your help!!
FURRYe38
Aug 08, 2025Guru - Experienced User
Any Criticals, Errors or Warnings seen in the event logs needs to be reviewed and resolved by the ISP. Indicates a signal issue on the ISP line up to the modem.
Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.
https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html
https://highspeed.tips/docsis-events/
So_tired
Aug 08, 2025Guide
Hello Furry! Thank you for replying.
Ok, I will make sure they look at ALL the cables going to my home.
Thank you for that websight about the streams and what they need to function poroperly.
I looked at all of mine and it seems my modem is running perfectly fine. So it MUST be a wire somewhere that is the issue and it must be outside my home.
I live in an apt. complex and not in the best place so I'm pretty sure it has to be outside.
Do you think the Enable Extended Upstream Transit Power being toggled ON has anything to do with these issues at all? Could not find info on it. Wondering if i should turn it off.
- FURRYe38Aug 11, 2025Guru - Experienced User
Did you toggle it on or was it already ON?
Can toggle it off and compare results...- So_tiredAug 11, 2025Guide
It was allready ON.
I did toggle it off and on, didnt seem to change anything.
For science, I returned the cm2500 modem and got a cm1000v2 downgrade, to see if it was just too beefy a modem for what we have in the apt.
Well, the cm1000v2 is haveing the exact same issues and giveing us HALF our paid for speed now.
The CM2500 gave us around 900mbps Download and 150mbps upload, our plan is for 800download and 100upload.
With the CM1000v2 we get 400-500 download and 6upload. Lmao
So now im thinking, that I've tested it properly and its all about the lines to the apartment, I should just return the cm1000v2 and get back the cm2500 because it was better over all? Plus the cm1000v2 seems to be fazeing out since the other 1000s in the line are no longer shown on the xfinity sight to even be supported.
In your professional opinion, would it be a good idea to just go and get the cm2500 back?
- FURRYe38Aug 11, 2025Guru - Experienced User
Ya I would get the CM2500 so you have something current and officially supported by the ISP.
Seems like this is a ISP and building issue that needs to be addressed.