Apple Macintosh Performa 5400 Series - Manual (Page 7)

You can use any standard phone cord to connect your internal modem
connector to a phone jack. If you have only one phone jack, consider
purchasing a line splitter at an electronics supply store. A line splitter enables
you to plug your phone and modem into the same jack at the same time. Keep
in mind that when your phone and your modem share a single phone line,
you will not be able to use both pieces of equipment at the same time, even if
they are attached to separate phone jacks. While you use your modem,
outside callers get a busy signal and you cannot call out. When your phone is
in use, you cannot use the modem.
IMPORTANT Disconnect your modem from the phone jack during lightning
storms to prevent voltage overload.
Connecting the mouse and keyboard
1 Plug the mouse cable into the recessed port on the back of the keyboard.
The plug and the port are marked with the ◊ icon (symbol). The positions of
the port and icon on your keyboard may be different from those pictured.
By the way: A port marked with the ◊ icon is called an Apple Desktop Bus
(ADB) port.
This cable plugs into the Apple Desktop Bus (ADB) port,
marked with the ◊ icon, on the back of the computer.
Plug the mouse into the recessed port on
the keyboard. The flat part of the plug should
be pointing down, as shown here.
6 Chapter 1