
Using an Internal Modem 7-1
COMPAQ CONFIDENTIAL - NEED TO KNOW REQUIRED
Writer: Karen Williams Saved by: Integrity Group Saved date: 06/01/00 3:44 PM
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Part Number: 168894-001 File name: CH07.doc
chapter
7
U
SING AN
I
NTERNAL
M
ODEM
The information in this chapter applies to all computer models
with internal modems.
NOTE:
The modem does not support the modem pass-through
connection available on some optional docking bases.
Connecting the Modem Cable
IMPORTANT:
The internal modem uses a universal DAA (Direct
Access Arrangement) that supports multiple countries. However,
in some regions, you may need to use an adapter to connect the
modem to the telephone wall jack. If you are connecting the cable
to a telephone jack that is not an RJ-11 jack, refer to “Using a
Country-Specific Modem Adapter” later in this chapter.
IMPORTANT:
Wall jacks for digital PBX systems may resemble
standard telephone jacks but are not compatible with analog
devices such as modems. Be sure the modem cable is connected
to a regular analog phone line. Plugging the modem into a digital
line will result in no dial tone and is not recommended. The
modem includes protective circuitry against the digital lines
producing excess current. A warning buzz will sound briefly
when excessive current is detected during a call attempt and the
attempt is terminated with the phone line back on-hook.
!
WARNING:
To reduce the risk of electrical shock, always ensure
that the modem line is disconnected from the telephone network
when opening the equipment’s enclosure.
!
WARNING:
To reduce the risk of electrical shock, fire, or damage to
the equipment, do not plug a telephone cable into the Ethernet RJ-45
jack.
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