http://www.wikipedia.org/wiki/BNC says: "The Bayonet Neill-Concelman
(sometimes wrongly called the British Naval Connector)". It goes on
to talk about the inventors.

Another web page said "Barrel Nose Connector" but this seems less
likely.

Best regards,

James Harriman

---- Original Message ----
From: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Subject: Re: [PEDA] OT: DB9 RS-232 serial port on peripherals.
Date: Fri, 11 Jul 2003 17:52:22 -0700

>yes the "B" is technically (or should i say pedantically) 
>wrong in all cases except the DB25
>i used to know the correct ones but fortunately i have forgotten them
>i think 9 is DE9
>15 is A as in DA15
>
>now for the real quiz
>what is the true derivation of the term 'BNC' ?
>i have heard many differing and 'authoritative' answers
>
>Dennis Saputelli
>
>
>Bagotronix Tech Support wrote:
>> 
>> Your peripheral is supposed to be a "DCE" (Data Communications
>Equipment), a
>> DB9F wired as:
>> 
>> 1 DCD
>> 2 TX
>> 3 RX
>> 4 DSR
>> 5 GND
>> 6 DTR
>> 7 CTS
>> 8 RTS
>> 9 RI
>> 
>> The above DCE mates with the PC connector, which is supposed to be
>a "DTE"
>> (Data Terminal Equipment), a DB9M wired as:
>> 
>> 1 DCD
>> 2 RX
>> 3 TX
>> 4 DTR
>> 5 GND
>> 6 DSR
>> 7 RTS
>> 8 CTS
>> 9 RI
>> 
>> It's not really a DB9 connector, it's proper name is something else
>(I can't
>> recall what).  So what?  So many people use the DB9 designation (I
>do) that
>> it's been redefined by popular usage.  I say "DB9M" for a DB9 male,
>and
>> "DB9F" for a female connector.
>> 
>> You see how the signals match up?  Each side's RX goes to the
>other's TX,
>> each side's RTS goes to the other's CTS, each side's DTR goes to
>the other's
>> DSR.  DCD and RI are "non-peer" signals, they are outputs on the
>DCE to the
>> inputs on the DTE.
>> 
>> There is no standard for grounding of the connector shell.  It's up
>to you
>> what you want to do with it.
>> 
>> Best regards,
>> Ivan Baggett
>> Bagotronix Inc.
>> website:  www.bagotronix.com
>> 
>> ----- Original Message -----
>> From: "Brian Guralnick" <[EMAIL PROTECTED]>
>> To: "Protel EDA Forum" <[EMAIL PROTECTED]>
>> Sent: Friday, July 11, 2003 2:48 PM
>> Subject: [PEDA] OT: DB9 RS-232 serial port on peripherals.
>> 
>> > Hi,
>> >
>> >     I was wondering what the pinouts of a peripheral's female
>RS-232 DB9
>> connection.  Basically, a device to be controlled by a
>> > standard PC.  I'm having a bit of a conflict concerning the
>crossing of
>> the RX & TX lines.
>> >
>> >
>> > Thx.
>> > ____________
>> > Brian Guralnick
>> > [EMAIL PROTECTED]
>> > ------------------------------------
>> > Protel freebees:> http://pages.infinit.net/helloftp/protel.htm
>> >
>> >
>
>-- 
>Dennis Saputelli
>
>  ========= send only plain text please! - no HTML ==========
>_____________________________________________________________________
>__
>Integrated Controls, Inc.           www.integratedcontrolsinc.com  
>2851 21st Street                    tel: 415-647-0480
>San Francisco, CA 94110             fax: 415-647-3003
>




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