Dell PowerEdge 1800 - Manual (Page 147)

I/O Ports and Connectors
147
Figure B-2. Serial Connector Pin Numbers
Parallel Connector
The integrated parallel connector, intended primarily for use by printers that require data in
parallel format, uses a 25-pin D-subminiature connector on the system's back panel. The default
designation of the system's parallel connector is LPT1. If you add an expansion card containing a
parallel connector configured as LPT1 (IRQ7, I/O address 378h), use the System Setup program to
remap the integrated parallel connector. See "Using the System Setup Program" in the User’s
Guide. Figure B-3 illustrates the pin numbers for the parallel connector and Table B-3 defines the
pin assignments for the connector.
Figure B-3. Parallel Connector Pin Numbers
Table B-2. Serial Connector Pin Assignments
Pin Signal I/O Definition
1 DCD I Data carrier detect
2 SIN I Serial input
3 SOUT O Serial output
4 DTR O Data terminal ready
5 GND N/A Signal ground
6 DSR I Data set ready
7 RTS O Request to send
8 CTS I Clear to send
9 RI I Ring indicator
Shell N/A N/A Chassis ground