On May 16, 2010, at 6:11 PM, Neil Cherry wrote:

>> You should be fine.  I've had people complain that the cisco RJ45
>> pinout that we designed ended up putting inappropriate signals on
>
> Cough*DEC*cough ;-)

DEC's standard didn't have enough pins, and used weird un-obtainium  
offset RJ plugs.

> I have several terminal servers that I use with lots of equipment
> (mainly Cisco but my terminal servers are Xyplex). We've extended
> the Cisco roll-0ver cables for about 100 feet with out problems
> at 9600.

Yes; rs232 is very forgiving.  In theory, the cisco pinout allows you  
to swap DTE/DCE by switching from a rollover to straight-through  
cable, which I've always liked.  It's other feature is that the  
"usefulness" of signals diminishes as you move outward from center.   
Use the center 4 pins for a 3-wire serial connect, 6 pins to add "hw  
flow control", and all 8 if you want modem control as well.

BillW


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