Originally Posted by andyw715
I think the TiVo tunes a channel, finds out its not currently available, asks the TA what frequency it's on. The TA asks the headend for the frequency and reputts back to the TiVo.
That is probably a simplistic explanation. Or maybe even incorrect.
Anyway it seems there must be some type of link between cable card and TA.
The link between the cable card and the TA, in this case, is, I suspect, the TiVo and it's hardware and software.
And I'm not sure involving more than one TiVo and its cable card(s) in the conversation with the TA will be without problems and confusion.
Basically the OP is talking about turning the Universal Serial Bus into a parallel connection where one client device, the TA, is hooked to 2 hosts.
I'm sure USB wasn't designed to work that way, the question is whether you can get away with it anyway, and unless the guy who designed all that stuff drops by with an expert opinion, the question will have to be answered with an experiment.
An experiment for which I don't hold out a lot of hope.