Multitech MultiModemDSVD User Manual page 80

MultiModemDSVD User Guide
4. Type AT&T3 and press ENTER. Once you receive an OK message from your
5. Have someone enter data from the remote keyboard. For this test, typing multi-
6. To exit the test, type the escape sequence +++AT and press ENTER. This puts
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modem (if responses are enabled), your modem is placed in digital loopback mode.
ple uppercase U characters is a good way to send an alternating test pattern of
binary ones and zeros. The data received by your modem enters its analog receiver,
is converted to digital data, is reconverted into analog, and then is transmitted
back to the remote modem. Your modem passes this test if the data received on
the remote monitor is the same as the data entered from the remote keyboard.
the modem in online command mode. The modem should respond with an OK
message. If you wish to stay on line with the remote modem for normal data
transmission, type AT&T and press ENTER to exit the test, then type ATO and
press ENTER to return on line. If you wish to terminate the call, type ATH and
press ENTER to hang up.