User Guide

Basics Modem - 3 1
Modem
The iMac computer features a built-in 56K hardware
modem. This internal modem supports both K56-Flex and
V.90 communications protocols.
Modem Performance Issues
To be able to accomplish 56K connections, your Internet
Service Provider or service you are connecting to must have
digital connections to the Telephone Company, and then
install special 56K digital modems which can use these
connections. By using a digital connection, a digital-to-
analog-to-digital conversion can be eliminated at their end,
which allows support of a higher speed transmit protocol
from their site. This means that users will not get 56K
connections if one user calls another user directly. Because
they lack the digital connections, they will connect at around
33.6 connections consistently.