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[So, this is really "half-duplex" testing, but that's what we bought them for, so that's what we tested]. However, when we plugged it in, it enumerated with the same driver as the TRENDnet TU-S9, and operated perfectly with the downloaded Prolific driver. The Sabrent SBT-USC1M worked flawlessly for us, but only after updating with a new driver v2.0.13.130 downloaded in file PL2303_Prolific_DriverInstaller_v110.zip (12/2/2009) from [.]. -- the driver from the included mini-CD-ROM wasn't tested by us, because the disc had a fracture crack and couldn't be read by our CD reader. Our torture testing included self-loopback on an XP laptop, from COM1 (internal UART serial port) to COM14 (where our TRENDnet port showed up), sending a thousdand 1099-byte blocks at 115200bps from one program to another, which echoed the blocks back to the first program for comparison after short delay.
Overall, I'm quite pleased. The packaging doesn't include instructions for downloading drivers online, but a quick Google search found the download site. The adapter ships with a mini cd with Windows drivers. I rated four stars in compatibility because I had the device map to a different COM port in Windows a couple times, which made creating a saved connection a bit of a hassle. I've tried it in Windows, Linux, and OS X.
It's entirely possible this is a Windows quirk, and not the device/driver's fault. I didn't get a chance to test the driver disc. Modern Linux kernels detect the device with no user interaction. I bought this adapter as a test unit, and I've put it through its paces. OS X and Windows require a driver install.
The device works well in all three operating systems.
The plastic housing surrounding the serial connection was too deep to allow the pins to make contact with my machine. I ended up tossing it in the junk drawer. I never got to use this cable. This wasn't obvious to me from the illustration.
This cable was exactly what I needed, or so I thought. I couldn't get the my laptop to recognize my serial devices with this cable.
For me, the price and product can't be beat. I was a little skeptical about some feedback concerning it's operation, but after getting it I plugged it up to my Garmin GPS, went online, and downloaded updates with no problem. Shipping didn't really take that long either.
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