[BC] Long serial connections

[Broadcast List USER]

Unless you are by a railroad track, and you can take over the wires  
on those glass insulators, MANY inches apart, Curt is right, 50 feet  
is about it, though with the proper cable you can extend it SOME.

A quarter-mile, you need those old railroad right of ways, with those  
wires on glass insulators, MANY inches apart.

Of course, you can depart from the RS-232 standard, and slow down the  
data to the point where it can work.  You can go many miles at 1  
Bauds, over very heavily capacitively loaded circuits.  (Short  
answer, don't flame me.)

--chip

On Mar 6, 2009, at 6:00 AM, broadcast-request at radiolists.net wrote:

> Message: 12
> From: Tom <Radiofreetom at gmail.com>
>
> I've heard of successful, reliable links running up to a quarter- 
> mile or so.
>
> Cowboy wrote:
>> On Thursday 05 March 2009 11:03 am, Evan Elrod wrote:
>>
>>>  Hello,
>>>  Quick question...
>>>
>>>  What is the longest serial/com port run that will still work?
>>
>>  The standard references 50 feet.
>>  In practice, if the levels are not dropped too much by the
>>  resistive losses of the wire, and the edges of the bits are
>>  not rounded too much by the roll off of the wire, it'll go
>>  almost indefinitely.
>
> Tom Spencer