On 06/28/2018 09:45 AM, Eric Smith via cctalk wrote: > Of course, this isn't specific to Ethernet. It can happen with e.g. > TIA/EIA-232 (formerly RS-232) as well, and in fact that is even more common > in practice, because Ethernet is transformer-isolated at each station, but > TIA/EIA-232 is usually not.
So, on a TIA/EIA/RS-232C DB-25 connector, what's the official position on pin 1? The standards calls it PGND = Protective ground and most reference seem to indicate that this is chassis/earth ground at both ends of a cable. --Chuck
