Earlier quoted context omitted.
EE/CE here. Yeah that's a garbage patent. I'm a practitioner in the field and 20 years ago that would have been some forward-thinking stuff. But in 2009, when it was filed? Total joke.
The priority date of the patent was Dec 5, 1997. So was it forward thinking a little over 17 years ago?
So either it was invented in 1997 and should have been patented then and would expire in 2017, or it was "invented" in 2009 and they trolled for something to give them a much, much earlier priority date so that it would seem more legitimate somehow.
Either way I'm not sure that I buy it.
EDIT:
I mean, hell, dial-up modems did the same thing basically. Connect and sync at a low baud rate, then switch to whatever the modems agreed the channel could support. How old are dial-up modems? 1980s? Acoustically coupled modems are at least as old as the 1970s. http://en.wikipedia.org/wiki/Modem#Acoustic_couplers