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On Fri, 19 Sep 1997, w.t.brown wrote: > I have a Thinkpad 560, pentium 120mz, 24 mb ram. I normally use a serial > cable to copy files back and forth to my desktop, at a speed of 115kps. I > was thinking of buying a jeteye for my desktop to use with > the infrared port on my 560 to copy files. However, Mobile Computing > magazine said their test of infrared > ports showed they effectively only operate at the very slow speed of about > 75kps, way too slow. > > Has anyone any experience with using infrared ports to copy large files to > a desktop? I played around with the IR on my 701 for a bit. I used a JetEye on a desktop. Putting the JetEye right next to the 701's IR port, *sometimes* I could transmit at 115kbps. Most of the time I had to drop down to 56kbps. At a separation of about 3m the 56kbps connection started to become iffy. I didn't try file transfers with this setup unfortunately, I just tested when typed characters started to drop. I don't know if this is a problem with the 701's IR port, the JetEye, or IR ports in general. To my HP200LX, I can only transfer at around 28.8kbps. Sometimes it'll go faster but the overall transfer rate seems to be 2.5-3.0 k/sec. If I connect directly via a serial cable I can get the full 115kbps. Again, I don't know if this is a problem with the 701's IR port, the 200LX's IR port, or IR ports in general. It hasn't been a problem because if I really need speed, I'll just pop the flash card from the 200LX to the 701 and write the data directly. For transferring data to a printer, a parallel connection is *much* faster than IR (or serial for that matter). Roughly 10 times faster. However, compared to how much time it takes me to dig up the parallel cable and 701 adapter, pop open the side, and plug it in, it's sometimes faster just to set the 701 down in front of the printer and print via IR. The speed should improve with the new IR spec, which is supposed to go up to 4Mbps. Unfortunately, that requires new hardware. -- John H. Kim kim@mak.com