92
5.375 x 8.375 ver 2.4.0
Chapter 6
Test Function
Normally, data communications are executed by connecting
your computer and modem to those of a remote station with a
communication line. If any errors or malfunctions are
encountered, it is necessary to check whether the cause is in
the local station, the remote station or the communication
line.
Test description
This internal modem has a local/analog/loopback test
function that identifies the cause of a malfunction. You can
use the test to check errors in data communications or to
check operation following modem connection.
When conducting a test, use the &T command to select test
mode and control. For details on the &T command, refer to
“&Tn Self-test commands” on page 68
In this test, data is transmitted from the computer, is looped
back (analog/loopback) within the modem from the
transmitter to the receiver, then sent back to the computer.
The test enables you to check whether the computer and
modem are working properly.
