I/o ports and connectors – Dell PowerEdge 2500SC User Manual
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I/O Ports and Connectors
Dell™ PowerEdge™ 2500 Systems User's Guide
Integrated Network Interface Controller Connector
I/O Ports and Connectors
The I/O ports and connectors on the back panel of the system are the gateways through which the system communicates with external devices, such as a keyboard,
mouse, printer, and monitor.
identifies the I/O ports and connectors for your system.
Figure B-1. I/O Ports and Connectors
Serial and Parallel Ports
The two integrated serial ports use 9-pin D-subminiature connectors on the back panel. These ports support devices such as external modems, printers, plotters, and
mice that require serial data transmission (the transmission of data one bit at a time over one line).
Most software uses the term COM (for communications) plus a number to designate a serial port (for example, COM1 or COM2). The default designations of your
system's integrated serial ports are COM1 and COM2.
The integrated parallel port uses a 25-pin D-subminiature connector on the system's back panel. This I/O port sends data in parallel format (where eight data bits, or
one byte, are sent simultaneously over eight separate lines in a single cable). The parallel port is used primarily for printers.
Most software uses the term LPT (for line printer) plus a number to designate a parallel port (for example, LPT1). The default designation of the system's integrated
parallel port is LPT1.