What is pin 4 used for on a 9 pin serial connector?

[skullyman]

What is pin 4 used for on a 9 pin serial connector?

 

[Ladi]

To quote from http://www.taltech.com/introserial.htm:

9 Pin Connector on a DTE device (PC connection)

Pin Name Direction of signal

1 Carrier Detect (CD) (from DCE) Incoming signal from a modem
2 Received Data (RD) Incoming Data from a DCE
3 Transmitted Data (TD) Outgoing Data to a DCE
4 Data Terminal Ready (DTR) Outgoing handshaking signal
5 Signal Ground Common reference voltage
6 Data Set Ready (DSR) Incoming handshaking signal
7 Request To Send (RTS) Outgoing flow control signal
8 Clear To Send (CTS) Incoming flow control signal
9 Ring Indicator (RI) (from DCE) Incoming signal from a modem

~Ladi

 

[skullyman]

Just what I wanted to know... The Link is GREAT !!!! Thanks for the info Ladi!!!