Communication Devices; Connecting A Modem Cable - HP Compaq nc6000 - Notebook PC Hardware Manual

Connecting a Modem Cable

A modem cable, which has a 6-pin RJ-11 connector at each end,
must be connected to an analog telephone line, in some countries,
with the use of a country-specific modem adapter. Jacks for
digital PBX systems may resemble analog telephone jacks, but
are not compatible with the modem.
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WARNING: Connecting the notebook to a digital line can
permanently damage the modem. Immediately disconnect your
modem cable if accidentally connected to a digital line.
If the modem cable contains noise suppression circuitry, which
prevents interference from TV and radio reception, orient the
circuitry end of the cable toward the notebook.
Hardware Guide

Communication Devices

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