[BC] Long serial connections

[Broadcast List USER]

The standard does not define a maximum cable length but instead  
defines the maximum capacitance that a compliant drive circuit must  
tolerate. A widely-used rule-of-thumb indicates that cables more than  
50 feet (15 metres) long will have too much capacitance, unless  
special cables are used. By using low-capacitance cables, full speed  
communication can be maintained over larger distances up to about  
1,000 feet.[7] For longer distances, other signal standards are  
better suited to maintain high speed.

--Wikipedia

http://en.wikipedia.org/wiki/RS-232

My STRONG suggestion is to convert it to another standard, and back  
if needed.  You can use RS-422, or even convert it to a signal that  
is non standard, but will travel over coax or CAT-5 or CAT-6 cable.

The RS-232 "standard" is quite old, and technology has marched on by  
quite a bit.

--chip

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

>
> Message: 2
> From: "Evan Elrod" <eelrod at wkyq.com>
>
> Hello,
> Quick question...
>
> What is the longest serial/com port run that will still work?
> We just moved studios, and want to have our Sage Endec in studio,  
> while
> still having our Multi Station Relay back in the rack room.   
> (Pretty good
> piece of ground to cover.)
> I'm having trouble getting it to work at all now, and I'm wondering  
> if the
> distance could be to blame?
>
> Evan Elrod