Serial ports, Serial port connector – Dell PowerVault 775N (Rackmount NAS Appliance) User Manual
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Serial Ports
The 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.
Serial Port Connector
If you reconfigure your hardware, you may need pin number and signal information for the serial port connector.
illustrates the pin numbers for the serial port connector and
defines the pin assignments and interface signals for
the serial port connector.
Figure B-3. Pin Numbers for the Serial Port
Table B-1. Serial Port 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