IBM 240 manual Use, Only, Network Pstn

								Handling your	computer
Ÿ	Do	not	turn	your		computer		over while the AC Adapter is plugged
	in.	This	could		break		the	adapter	plug.
Ÿ	Do	not	use	your		computer		when the temperature is below 10°C
	or	above 35°C			(50°F		to 95°F).

ŸDo not place your computer closer than 13 cm (5 in.) from any

electrical

appliance

that

generates

a strong

magnetic field, su

as a motor, a magnet, a TV, a refrigerator, or large

audio

speakers.

Ÿ

Do

not

hard-mount

your

computer

in

a

vehicle

or

anywhere

that

is subject to strong vibration. See “Ruggedized mobile

computers” on page 39 for information

on

a

more

appropriate

model

for

demanding

applications.

Ÿ Do

not crush, drop,

or

physically

punish

the

external

or

remov-

able hard

disk

when

it

is outside

your

computer.

Ÿ

Do

not

insert a

diskette

into

the

external

disk

drive

at

an

Not inserting the diskette straight into the

drive can

damage

head.

ŸDo not place more than one label on a diskette. Multiple or loo

labels can detach or tear and then lodge in the drive.

Ÿ

Do

not

connect

the

modem

to

a PBX (private branch exchange)

or

other

digital

telephone

extensionYour computer linecan .

use

only

a

public-switched

telephone

network (PSTN)

. Use

of

a

phone

line

other

than

PSTN

can damage your modem. If you

are not sure which kind of

phone line you are using, contact

telephone company. Many hotels or office buildings use digital

telephone

extension

lines,

so

check before connecting the tele-

phone

cable

in

such

places.

Ÿ

Do

not

leave

the

base

of

your

computer

in

contact

with

your

or any part of your body

for

an

extended

period

when

the

puter is functioning or when

the battery is charging. Your co

puter

dissipates

some heat

during

normal

operation. This heat i

a function of the level of

the

system

activity

and

battery

level.

Chapter 1. Getting familiar with your37 computer