User`s manual

U.S. Robotics I-modem Command Reference
Modes of Operation • Page 2-1
Chapter 2
Modes of Operation
Command and Online Modes
Command mode. When the I-modem is in Command mode, you can control it using AT
commands.
Online mode. When the I-modem is in Online mode, it is connected over telephone lines
with another device.
Online Command mode. By entering Online command mode, you can send the I-modem
commands while you are online with another device.
Entering Online Command Mode
+++ Revert to Command mode
. Once the I-modem is online with another system, the
only command it recognizes is an escape code, which you enter by pressing the
plus key three times.