Modem And Networking; Internal Modem; Modem Cable - HP Compaq Presario,Presario R4000 Hardware And Software Manual

Internal Modem

Modem Cable

Your notebook has an RJ-11 (modem) jack and an internal
modem. A modem cable with a 6-pin RJ-11 connector at each
end is included with all notebook models.
If you purchased your notebook in a country where RJ-11 jacks
are not standard, a country-specific modem adapter is also
included. The adapter enables you to connect your modem to the
type of telephone jack that is standard in your country.
CAUTION: To prevent permanent damage to the modem, do not
Ä
connect the modem to a digital line. If you accidentally connect the
modem cable to a digital line, immediately disconnect the cable.
Your modem cable must be connected to an analog, not a digital,
telephone line. Most home telephone lines are analog. Jacks for
most PBX systems are digital. Some digital PBX jacks resemble
analog jacks, but they are not compatible with the modem.
Some modem cables include noise suppression circuitry, as
shown in the following illustration.
Hardware and Software Guide

Modem and Networking

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