User`s manual

U.S. Robotics I-modem Command Reference
Flow Control • Page 10-1
Chapter 10
Flow Control
The I-modem has two buffers, one for data transmitted from your computer, and one for
data received from the phone line. Buffers are data-storage areas of variable size.
Flow control provides a system for stopping and starting transmission depending on how
full the buffers are. Its goal is to prevent overÞlling the buffers and losing data.
There are two kinds of ßow control: hardware and software. I-modems support both, but
your computer and communications software must also support the kind of ßow control
you choose.
Note We recommend that you use hardware ßow control. If you do, depending
on your communications software, you may also need to disable your com-
munications softwareÕs software ßow control.