Multi-Tech Systems MT2834ZPX owner manual Digital Loopback Test/V.54 Loop 2 Remote/ Automatic

MT2834ZPX Owner's Manual

5.Data is typed from the remote keyboard. For this test, typing multiple upper case "U" characters is a good way to send an alternating test pattern of ones and zeros. The data received by the local modem will enter its analog receiver, be converted to digital data, be reconverted into analog, and then looped through its transmitter back to the remote modem. Your modem passes this test if the data entered from the remote keyboard is the same as the data received on the remote monitor.

Figure 6-2. Digital Loopback Test (local/manual)

6.When testing is complete, you may end the test by typing an Escape Sequence (+++AT<CR> or <BREAK>AT<CR>) to bring your modem into 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 AT0 and hit ENTER. If you wish to terminate the call, type ATH and hit ENTER to hang up.

Digital Loopback Test/V.54 Loop 2 (Remote/ Automatic)

In this test, your modem must be On-line with another modem set up to respond to a request for Digital Loopback (note that some modems may not support Remote Loopback or may have this feature disabled).

The test procedure is as follows:

1.Go into Terminal mode. Type AT and hit ENTER; you should get an OK message.

2.Dial the remote modem by entering the Dial command and the phone number, to establish On-line mode.

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