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I think the 2215 is the only Pocket PC that has CIR, however, it doesn't HAVE to have CIR. My A716 has "FIR" and "SIR," which are different IR transfer rates (FIR=4 Mbps max.; SIR=115 Kbps max.).
Anyhow, mine works running FIR and PDAWin's TV Remote Control. I haven't tested to see how far away it works, but it is at least 8-10 feet from my TV to the couch. I purchased Remote Control, but also trialed most of the other remote controllers and they worked in my TV to couch range.
I'm sure FIR isn't as good as CIR for controlling devices, but it does work fine at much more than a few inches.
Don't know how it would work on a 4155, though . . .
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