CM500 only one upstream channel and frequent disconnects

[jcgill]

My internet connection has been having frequent outages for a while now. I noticed the upstream light on my modem was solid amber and after looking at how to fix that I saw recommendations to look at the cable connection and event logs of the modem. I saw I only have 1 upstream channel and my modem says I should have 4. Any advice on how to fix this?

[plemans]

You have a lot of errors in your lines. 

Remove any splitters, amplifiers, attenuators from your line. Try and hook the modem to right where the coax enters the home. If you still continue to have signal issues like that, your isp needs to check your lines. 

[westerj]

WHat can I learn from Critical and Warning entries in my Event Log?  I'd like to separate findings that are my responsibility from those of my ISP. EX:

Critical (3)   No Ranging Response received - T3 time-out;

Critical (3) Unicast Ranging Received Abort Response - Re-initializing 

Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out

Critical (3) Started Unicast Maintenance Ranging - No Response received - 

Unicast DSID PSN startup error

No UCDs Received - Timeout

SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;

SYNC Timing Synchronization failure - Failed to acquire FEC framing

DHCP WARNING - Non-critical field invalid in response

Honoring MDD; IP provisioning mode = IPv4

Are there docs for these logs?

Thanks!

[plemans]

@westerj Please start your own thread. Include screen snips of the logs and cable connections page. Easier to read. 

some basic info

https://pickmymodem.com/signal-levels-docsis-3-03-1-cable-modem/