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RS232 vs ITU V24 Signal Names » History » Revision 3
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laforge, 11/23/2022 07:25 PM
add direction column
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 | Ready for receiving |
Full ITU V.24 table¶
Updated by laforge over 1 year ago · 3 revisions