Peripheral Equipment
205
5.1.4 Data port
The data port(s) are implemented as Digital Circuit Terminating Equipment (DCE). The connector
used are female 9-pin D-subs.
Signal name Direction Pin
number
Carrier detect, CD From
DCE 1
Receive data,
RXD From
DCE 2
Transmit data,
TXD To DCE 3
Data terminal
ready, DTR From
DCE 4
Signal ground,
GND 5
Data set ready,
DSR From
DCE 6
Ready to send,
RTS To DCE 7
Clear to send,
CTS From
DCE 8
Ring indicator, RI From
DCE 9