[Ham-Mac] USB Serial adapters

[Jack Brindle]

>>The point I was making is that the RS-422 port can be strapped to 
>>work with RS-232 devices including hardware handshake devices, the 
>>RS-232C port CANNOT be used with RS-422 devices.
>
>Yes, entirely true. Fortunately there aren't many RS-422 devices 
>around anymore :-)


RS422 was superceded by RS-485. There are a LOT of RS-485 devices 
around, mostly used in industrial equipment. Interestingly, the Mac's 
RS422 ports can work with quite a bit of the RS485 devices with no 
problem.


The original poster mentioned that he was replacing an older 
PowerBook (PB1400 I believe) with the iBook. If he has cables for the 
older system, they would work just fine with the Keyspan dual serial 
adapter. No need to worry about replacing the cables as well...

I just wish that Keyspan would discount the 4-port device once in a 
while. We see the dual discounted regularly by various computer 
stores, but I don't think I have ever seen a Keyspan four-port device 
at a store. For that matter, I have never seen one at the MacWorld 
Keyspan booth (for sale) either!

Some day we will have radios with USB built-in...

-Jack Brindle, W6FB
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