[Elecraft] K3s question

[Fred Townsend]

I agree the connector is defined with RS232c as well as connectors for USB, Firewire, HPIB aka IEEE488, and SCSI III. The DB25 connector was around before RS232 was written. DB 25s were also used by IBM PC for the parallel and RS232 ports and by Apple for SCSI I & II. IBM later used the DA9 for serial while continuing to use the DB25 on the AT parallel port.

73, Fred, AE6QL


-----Original Message-----
>From: Jack Brindle <jackbrindle at me.com>
>Sent: May 14, 2015 10:17 PM
>To: Elecraft List <elecraft at mailman.qth.net>
>Subject: Re: [Elecraft] K3s question
>
>Not quite true. The EI232 spec as it is now called does indeed define the connector and pinouts in addition to signals and levels.
>There are definitions included for DB-25, DE-9, RJ-45 and maybe a few others. Few vendors meet the entire spec, usually
>leaving out a few handshake signals. But, this still allows them to claim spec compliance as long as the signal levels meet
>the spec requirements.
>
>RJ-45 serial ports have been shipped by a large number of vendors, including Sun Microsystems, HP and others.
>
>- JackB, W6FB
>
>> On May 14, 2015, at 9:50 PM, David Christ <radioham at mchsi.com> wrote:
>> 
>> The of an RJ-45 jack for a serial port is hardly innovative nor new.  Lantronix has been using them for well over 15 years.  I will be interested to see if Elecraft uses the same pin assignments.
>> 
>> Remember, RS-232 is not a physical connector specification.  It defines the signals.
>> 
>> David K0LUM
>> 
>> 
>> On May 14, 2015, at 11:10 PM, Don Wilhelm <w3fpr at embarqmail.com> wrote:
>> 
>>> That is an RJ-45 jack.  Even though the RJ-45 jack is also used for Ethernet, the fact that an RJ-45 jack is present does not state (or even imply) that it is an Ethernet connection - it is simply a compact 8 pin jack.
>>> 
>>> 73,
>>> Don W3FPR
>> 
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