lost connection + telnet log

[occalifornia]

I see, what evidence would a log contain showing the isp is using some sort of clone detection?

1) Have no devices plugged in.
2) Plug in the subbed modem. If it doesn't get kicked off, good to proceed.
3) Plug in the cloned modem for your testing. If it gets kick off, clone detection.
4) Try moving it further away geographically and see if it still gets knocked off. That will tell you more about how your CMTSs are configured.