[Elecraft] serial port remote control of K2 question

[Mike S]

At 05:10 PM 3/27/2006, Don Wilhelm wrote...
>It is unfortunate that the PC world uses these DE9 connectors for RS-232,
>and it is (was) a PC world implementation only, real RS-232 ports use the
>DB9 or the RJ45 connectors - these are defined in the RS-232 standard, the
>DE9 connector is not in the latest standard publication that I am aware of.

There is no DB-9. ITYM DB-25, but that wasn't specified in RS-232 - it was added with RS-232C. Prior to that the standard merely called for an unspecified 25 pin connector.

What was once RS-232 was replaced by EIA/TIA-232, which in turn was succeeded by ANSI/EIA/TIA-723-1998 "High Speed 232 Type DTE/DCE Interface," which is active and current. The standard says the DE-9 interface shall be referred to as "ANSI/EIA/TIA-723 Alt B." In addition to the regular DB-25, there is also a 26 pin "Alt A."