said by Jim Gurd 
:said by aliasrlz :Weird, there were no problems with it before August, before the last upgrade cycle. So, you're saying the chipset went bad at the same time of the upgrades?
No. I think when they did the speed upgrade you went from QAM 64 to QAM 256. This particular modem has problems with QAM 256 systems. When you were on the old QAM 64 system everything was fine.
That's what happened to me. I was fine until the speed upgrade and then my Signal to Noise Ratio dropped like a rock. On the Moto 5120 it was about 27dB. Switching to the RCA cause it to jump back up to 39dB and all was well after that.
Hmmmm, and I thought the Motorola Modems were suppose to be da bomb! 
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... oh well, guess not