Christian Corti wrote:
E.g. the ASR33 is not RS-232 but definitely V.24;
The Teletype Model 33 ASR may or may not meet V.24, depending on how it
is wired. There are a *lot* of different ways to wire it.
the same applies to a DE9 PC "serial port".
The DE9 PC serial port meets the EIA/TIA-232 standard electrical
characteristics (if the board is designed properly), and TIA-574
standard connector.