Apple PowerBook (3400 series) - Manual (Page 61)

Connecting an external modem
You can use a PC Card modem in your computer’s PC Card slot. For
information on connecting and using a PC Card modem, see the
documentation that came with your modem, as well as “Using a PC Card
Modem” in the section “Using PC Cards (PCMCIA Cards)” in Chapter 3 of
this manual, and the “Using PC Cards” topic area of Mac OS Guide, available
in the Guide (h) menu.
You can also connect an external modem to the modem/printer port on the
back panel of the computer. The modem/printer port is GeoPort compatible.
To connect an external modem, follow these steps:
1 Make sure the computer is in sleep or shut down.
2 Connect the modem to a power source and to the phone line.
3 Make sure the modem is turned off.
4 Connect the modem cable to the port marked with this icon:
5 Turn on the modem.
6 Wake or restart the computer.
7 Open the Chooser and select the icon for a network printer (such as LaserWriter).
You must select a printer to be sure that the modem/printer port is available
for the modem.
8 Turn off AppleTalk in the Chooser.
If you see a message, click OK.
Note: If you are using an Ethernet or infrared connection, you don’t need to
turn AppleTalk off.
The external modem is ready to use.
61 Connecting Additional Equipment