Port Pinouts
25-pin
Centronics
Signal
Source
10
10
nAck
Printer
11
11
Busy
Printer
12
12
PError
Printer
13
13
Select
Printer
14
14
nAutoFd
Host
15
32
nFault
Printer
16
31
nInit
Host
17
36
nSelectIn
Host
18-25
16, 17, 19-30
Ground
Serial Port
The table below shows the pinout of the print server’s 9-pin RS-
232 serial port. The print server’s serial port is a DTE (Data
Terminal Equipment) port, and should be connected to a DCE
(Data Communications Equipment) serial port on your printer.
Consult your printer’s documentation for detailed information
on how to connect the print server to your printer.
9-pin
Signal
Function
1
DCD
Data Carrier Detected (DCE
à
DTE)
2
RXD
Received Data (DCE
à
DTE)
3
TXD
Transmitted Data (DTE
à
DCE)
4
DTR
Data Terminal Ready (DTE
à
DCE)
5
Gnd
Signal Ground
6
DSR
Data Set Ready (DCE
à
DTE)
7
RTS
Request to Send (DTE
à
DCE)
8
CTS
Clear to Send (DCE
à
DTE)
9
RI
Ring Indicator (DCE
à
DTE)
