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Re: Data from a serial port



On 10/3/2014 8:19 PM, Joel Rees wrote:
> On Sat, Oct 4, 2014 at 5:52 AM, Jerry Stuckle <jstuckle@attglobal.net> wrote:
>> On 10/2/2014 8:24 PM, Ethan Rosenberg wrote:
>>> [...]
>>
>> In addition to Dan's comments - is your cable OK?  Do you need a
>> straight-through cable or a cross-over cable?  Does the terminal
>> require/honor DSR/TSR and RTS/CTS?  If so, are these lines active?
>>
>> You may need a breakout box on the cable to see what's happening on the
>> lines.
> 
> If, for some reason, you can't get a breakout box, you may be able to
> do basic tests on the cable with a multimeter (ohm-meter or
> connectivity function), the pin diagrams, some patience, and maybe an
> extra pair of hands (if you can't find small-mouth alligator clips or
> pin clips). Just don't tell whoever handles requisitions/budget unless
> they understand that patience costs time and money when doing things
> like this. You have to be really careful to keep the leads from
> slipping, and not noticing a slipped lead can cost hours of
> unnecessary work.And there are tests you really don't want to try
> without a breakout box or the equivalent.
> 

Why couldn't he?  They're cheap, i.e.
http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_14285_-1.

Note if he's using DB9 connectors he would need a pair of DB9-DB25
connectors.  But they are also cheap.


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