Local Echo; Command Mode Local Echo (En); Online Local Echo (Fn) - US Robotics COURIER User Manual

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COURIER HIGH SPEED MODEMS
LOCAL ECHO
Local echo is the display of what you type at the keyboard and
data the Courier transmits to another modem. The En command
controls the display of your typed commands, when the modem
is in Command Mode. The Fn command applies to when the
modem is online to another system.
Command Mode Local Echo (En)
The En command enables
I
disables the display of your typed
commands. If double characters appear on the screen, both the
modem's local echo and your software's local echo are on.
The Courier is shipped with DIP switch 4 OFF, enabling local
echo. The En command controls the local echo for a current
session, independently of the switch setting. At power-on and
reset, the modem operates according to the DIP switch setting.
The En command is not stored in nonvolatile memory as a
power-on/ reset default.
EO Command Mode echo OFF. The modem does not display
keyboard commands.
El Command Mode echo ON.
Online Local Echo (Fn)
This command causes the modem to display a copy of the data it
is transmitting to another system. Many systems, however,
return a copy of received data, which is called a remote echo. If
the modem's online echo is ON and there is also remote echoing,
double characters appear on the screen.
In some microcomputer documentation, the term duplex is
applied to local online echoing, although the term is not techni-
cally accurate.
FO
Online echo ON. Sometimes called half duplex. As the
modem transmits data to a remote system, it also sends a
copy of the data to the screen.
Fl
Online echo OFF. Sometimes called full duplex. Default.
Internal Controls 5-9