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Sorry to hear you have had so much trouble. I would not say trouble with the cable portion is another story, it most likely fits in with the trouble you are having with your connection.
Here is a very helpful post you can review, DATA-TO-POST-TO-GET-HELP-FROM-THE-COMMUNITY
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|Downstream Bonded Channels|
|Upstream Bonded Channels|
|Current System Time:Thu Apr 13 23:22:08 2017|
Looks like loose connections, blown or too many splitters or wet coax outside... call twc. Your s/n and levels are on the bottom end of acceptable and you're also getting some 4G lte cellular ingress.(probably from a Verizon phone... Make sure all connectors are shiny and tight, don't go thru ups/ outlet surge strips
Verizon is in a competitive race to improve 4G LTE cell coverage in rural areas for their customers. We suspect they may have recently constructed a new transmitting site along the roadside close to a leaky spot in TWCs cable plant. Verizon also leases airtime space on their network to some smaller cell companies; we don't know if either MetroPCS or Virgin Mobile are doing that in your area.
If your connection is dropping out every 12 hours or so, it sounds like the DHCP lease is not renewing itself. That would be caused by a loss of communications in either direction between your modem and TWC's DHCP server in Columbus @agentx5. It often shows up in the modem's event log as a repeated T3 or T4 outage. It would be very unusual for TWC service to have bucket truck crews working around the clock on outside trunk line outages, so I think they are in the clear.
You have a serious coaxial issue. A -15 Rx DS level and +58 US TX indicates that. Call TWC while it's happenning if you can.
Those levels are out of spec and the modem won't ever work right or get proper bonded channels
You're "full post of levels shows levels indicating more than a single 2 way splitter. Please desribe what other TWC eqt you have and where it is splitter wise