I've been unable to get the USB to serial adapters I have to work with my Cisco equipment. My theory is that the devices do not produce enough voltage on the transmit side, I'm assuming they only provide the 5 volts from the USB port, not the 9 or 12 volts that are standard on RS-232. It's just a theory. Anyway...
I was surfing around the internet and came across this product:
USB Serial Cables - Get Console Shop
It's a USB to serial cable wired with a Cisco compatible RJ-45 end on it. It doesn't cost too much and if it's a good cable I might just buy a fistful of them.
For USB to serial adapters I currently have a KeySpan USA-19Qi and a Belkin F5U103. Both are ancient and neither appear to work with my Cisco gear. I've seen people recommend KeySpan adapters for use with Cisco gear before but apparently I have the wrong model. The Belkin adapter, even if it did work with the Cisco gear, has driver issues.
I have a Cisco 2509 which gives me serial terminal emulation when I'm in my basement but I'd like to have something that I can use on a laptop for when I'm not in my basement. If this Get Console cable works then I'd consider getting a bunch of them, hooking them up to a computer, and retire the 2509. I have laptops that run Mac OS X, Windows 7 & XP, and Ubuntu so any adapter that is supported by all of them would be awesome.
I see Get Console offer cables for Apple iOS devices. That might come in handy if I upgrade from my old iPod to an iPhone or iPad, my current iPod is too old for the software that supports these cables. I'd also appreciate any comments on the Apple iOS cables and software.