speed at which you connect to the Internet is determined by a number of
from the factors mentioned above, other circumstances prevent 56K modems
connecting at 56K. That is actually only the theoretical speed of the
modem; in practice, the
real-world access is generally in the 35-45K range for these modems. Despite
56K modems still attain the fastest standard modem speeds currently available
on the market.
(pronounced "V-dot-ninety") is the name of the international
standard agreed on for all 56K modems Before that standard was reached,
there were two different proprietary standards for 56K modems: one called
x2 and supported by 3Com/U.S. Robotics; the other called K56flex and supported
by Rockwell and Lucent.
is the amount of information (usually measured in bits-per-second)that
can be sent through
an Internet connection. Bandwidth is commonly compared to a water pipe
a large pipe (a high-bandwidth
connection) can carry more water (information) than a small pipe (a low-bandwidth
the Internet, throughput measures the speed of a communications channel
or connection. A connectihon's
throughput is the number of bytes per second it can transfer. Throughput
is closely related
Services Digital Network. A special kind of high-speed phone service that
voice and data transmission over the same phone line. ISDN lines provide
speeds of around 128Kbps, or double the fastest modems.