Let me add a little more information. My box is a Series 1 Philips DSR6000. It's not hacked beyond adding more space. It's running 3.1.0b-02-1-001. And it's now on day 157 of not being connected to the phone line.
And it has always been thus, ever since moving into this house of the awkwardly placed phone jacks. I'll either drag a cord to the TiVo, or drag TiVo to a jack every six months or so, just for fun, but it's never lost recording functionality.
Of course, my TiVo's physically located in the good ole U S of A, so it's got that going for it, I guess.
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-Aaron