Thanks @Datalink for such an informative response.
My CODA software version is 2.0.10.28T2
DOCSIS WAN page:
Downstream Overview
Port IDFrequency (MHz)ModulationSignal strength (dBmV)Channel IDSignal noise ratio (dB)1591000000256QAM6.800738.6052855...
I too have a DIR880L router and it was working great with the CODA 4582 in bridge mode. Recently there was an outage in my neighbourhood and I lost cable, internet and home phone. After the outage was over, I had the problem of slow download speeds...