Cable Modem Woes
A couple of months ago I started having some serious issues with my cable modem. The modem would randomly disconnect and reconnect throughout the day. I called my ISP, and they would tell me everything seemed fine. Then sent a guy to the house who redid some of the connectors on the outside of the house, but it did not help at all.
In a fit of frustration, after it had done this ten times in a 30 minute period, I ran off to Walmart and bought a new modem. Things seemed to be better for a couple weeks, then it started again. When the cable company was of little help, I found that Motorola modems provide some data through a web interface at http://192.168.100.1. I started plotting graphs of Power Level, and Signal/Noise ratio using rrdtool. I was hoping to find a correlation between the disconnects and these values. Today I was looking at the graphs and noticed a strange boost in the upstream power level:




I’m not sure what these values mean, but I would think that higher is better. I didn’t notice any disconnects during the period of improved upstream power level. Anyone know what these values mean?