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Types of equipment
There are three types of equipment you can use to connect to a telephone line: a modem, an ISDN
line, and telecommunications equipment you share with others on a local area network.
line, and telecommunications equipment you share with others on a local area network.
Modem
A modem is the most common means of connecting a computer to a phone line, particularly if you are
using your computer at home. A modem works with standard analog telephone lines. Your computer
comes with a GeoPort adapter that gives you access to the computer’s modem. For instructions on
using your computer’s modem, see “About Your Computer’s Modem,” later in this chapter.
using your computer at home. A modem works with standard analog telephone lines. Your computer
comes with a GeoPort adapter that gives you access to the computer’s modem. For instructions on
using your computer’s modem, see “About Your Computer’s Modem,” later in this chapter.
ISDN line
An Integrated Services Digital Network (ISDN) line is a special digital phone line that is about four
times faster than the fastest modem used over a standard analog telephone line. However, an ISDN line
typically costs more than regular phone service and may not be available in your community.
times faster than the fastest modem used over a standard analog telephone line. However, an ISDN line
typically costs more than regular phone service and may not be available in your community.
Connecting to an ISDN line
If you routinely need to send and receive large files, and find that a 33.6 kbps modem is not fast
enough for your needs, you may want to consider connecting your computer to an Integrated Services
Digital Network (ISDN) digital telephone line, which can transfer data at up to 128 kbps, nearly four
times as fast as a 33.6 kbps modem.
enough for your needs, you may want to consider connecting your computer to an Integrated Services
Digital Network (ISDN) digital telephone line, which can transfer data at up to 128 kbps, nearly four
times as fast as a 33.6 kbps modem.
ISDN lines are available to many but not all residential and business telephone customers. Check with
your local phone company to see if ISDN service is available at your location.
your local phone company to see if ISDN service is available at your location.
There are fixed monthly charges and per-minute usage fees for ISDN, just as for regular phone service.
Typically, ISDN costs a bit more than regular phone service. However, one ISDN line can support
several devices simultaneously—such as a computer, voice phone, and fax machine—so you may be
able to replace existing extra phone lines with one ISDN line.
Typically, ISDN costs a bit more than regular phone service. However, one ISDN line can support
several devices simultaneously—such as a computer, voice phone, and fax machine—so you may be
able to replace existing extra phone lines with one ISDN line.
Note: Because an ISDN line requires a power source at your location, a phone attached to an ISDN
line will not work during a power outage. For emergency use, you should consider keeping your
regular phone line (which receives power from the phone company) as a backup.
line will not work during a power outage. For emergency use, you should consider keeping your
regular phone line (which receives power from the phone company) as a backup.
Connecting
Your Computer to
a Telephone Line
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