RS232 vs ITU V24 Signal Names » History » Revision 4
Revision 3 (laforge, 11/23/2022 07:25 PM) → Revision 4/5 (laforge, 11/23/2022 07:25 PM)
h1. RS232 vs ITU-T V.24 Signal Names There are unfortunately a lot of different terms/names used for serial interfaces, depending on which context/spec you are looking at. This table provides a mapping of the most common signals between different specs: |_.Common Name|_.RS232|_.ITU-T V.24|_.Direction|_.Description| |GND|AB|102|-|Signal/System Ground| |TXD|BA|103|DTE->DCE|Transmitted data| |RXD|BB|104|DTE<-DCE|Received data| |RTS|CA|105|DTE->DCE|Request to Send| |CTS|CB|106|DTE<-DCE|Clear to Send| |DSR|CC|107|DTE<-DCE|Data Set Ready| |DTR|CD|108/2|DTE->DCE|Data Terminal Ready| |DCD|CF|109|DTE<-DCE|Data Carrier detect| |-|-|113|DTE->DCE|Transmitter signal element timing (DTE source)| |-|-|114|DTE<-DCE|Transmitter signal element timing (DCE source)| |-|-|115|DTE<-DCE|Receiver signal element timing (DCE source)| |RI|CE|125|DTE<-DCE|Ring Indicator| |-|-|133|DTE->DCE|Ready |-|-|133||Ready for receiving| h2. Full ITU V.24 table !v24.png!