TIVO Tuning Adaptor spontaneous restart/reboot

I agree.  I had no trouble until the mid-split transition in my area earlier this year.

Frequencies in my TA's have bounced around a bit, but always in conflict with one of the modem frequencies.  I'll fire up my TA tomorrow and check on what it's currently using.

I've read too much on this subject over the past few months, and have come to a few conclusions.

1. The root cause of the TA crashing is the COX transition to a mid split frequency scheme.  The evidence is just too compelling,  Everything fine before the transition, problems appearing after the transition.  The transition was either poorly done or has revealed latent problems in the TA.
2. The TA has significant difficulty communicating on the down stream link.  Error counts are excessive.  Even more alarming is that uncorrected errors often exceed the corrected error count in the TA.  On the plus side, the TA is amazingly error tolerant.  Uncorrected errors can rise into the 10's of thousands before a crash resets the counters.  But, a good theory is that a latent bug crashes the TA when exactly the wrong packet gets corrupted.
3. The frequencies chosen buy the TA almost always conflict with those used by the cable modem.  There is no indication that a multiple access protocol is in place to prevent collisions, so collisions are inevitable.  The natural consequence of collisions is errors.  The cable modem is likely in a better position to ride through this errors given the protocols in use.  The TA is simply rolling the dice that it can ride through them.
4. TIVO is not blameless here.  Its behavior of going into a panic canceling all recordings and pestering the user with messages when it briefly looses contact with the TA is simply poor design.  It could easily ride through such errors and give a little extra time to the TA before declaring a panic.
5. One must also look at the cable modem.  Not sure how frequencies are allocated, but if it could somehow avoid the frequencies used by the TA, perhaps life would get better.  It would be an interesting experiment to power down the modem, reboot the TA, then power up the modem to see if they are still using the same frequencies.  It would also be interesting to know if a COX provided modem is also colliding with the TA.  My own modem is a fairly new Motorola that COX is always trying to get me to change out in favor of theirs.

The upshot it that there are several opportunities to "fix" this problem. COX could straighten out their mid-split frequency allocation, CISCO could fix the bug in their firmware (fat chance since they delayed the box obsolete years ago), the modems could be smarter about their frequency selection.  

Probably the worst thing about this whole situation is how COX has handled it.  Assuming they know what the problem is, they are keeping their support staff in the dark.  Untold hours have been wasted with truck rolls, hardware swaps and phone support,  Hard working support staff and done their level best to solve a problem their company is fully aware of.  Shameful corporate behavior.  COX has chosen to bury this problem and ignore it.