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.

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