User guide

Networking

In addition to using your PowerBook’s built-in LocalTalk port to

access a LocalTalk network, you can also access another network

type—such as Ethernet or Token Ring—if you have a Duo Dock II,

which has a built-in EtherTalk port, or you have installed the

appropriate NuBus card in your dock. The first time you use the

other network, you must open the Network control panel and

select that network type.

Once you have made a selection, the PowerBook remembers it

whenever the PowerBook Duo is docked. Whenever the

PowerBook is not docked, LocalTalk is the network type.

For more information about setting up and using your dock with

an Ethernet network, see “Using your Duo Dock on an EtherTalk

Network” later in this guide.

Modem

If you want to use an external modem with your PowerBook Duo

System, connect the modem cable to the Duo Dock port marked

with this icon: W

If your PowerBook has an internal modem, select the Internal

Modem in the PowerBook control panel before opening your

telecommunications program.

RAM cache

If you have a Duo Dock II (or an upgraded Duo Dock), a 32K RAM

cache is built into the dock. This electronic cache function

automatically speeds up the processing of a PowerBook Duo

when it is docked. The cache speeds up your PowerBook Duo by

keeping the most recently used data and instructions in the cache

so that they can be executed instantly rather than reloaded from

memory and then executed. Because the cache is built-in, you

need not turn on or otherwise set this feature—it works

automatically when you dock your PowerBook Duo.

If you have system problems

If your docked PowerBook crashes (the screen goes blank or fills

with gibberish) or freezes (the pointer doesn’t move and input

devices don’t work), press the power button on the back of the

dock once. Pressing once turns the PowerBook off. Use the Power

On key on your external keyboard to turn the PowerBook on

again.

Pressing the power button erases any information you did not

save, but it allows you to restart the system and continue working.

See the troubleshooting section of your PowerBook User’s Guide

for more information about handling system problems.