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Service Guide 2-7
2.5.3 Installing an External Serial Port Device
The notebook contains an external RS-232 serial port with a 9-pin, male DB-9 connector as shown
in Figure 2-5 (25-pin cables require the use of an adapter for use with the 9-pin port). The serial
ports are used to interconnect such devices as:
• External Modem
• Serial Mouse
• Serial Printer
• Any device that uses an RS-232 interface
Caution: Never connect a parallel device to a serial port or a serial device to a parallel port or video
port; this may cause damage to the notebook and/or external device. If you are uncertain
of what type connector the external device has, refer to the technical manual for the
external device.
Figure 2-5 Serial Port Pinouts