Multi-Tech Systems MT3334ZDXV owner manual Digital Loopback Test/V.54 Loop 2 Remote/Auto

MT3334ZDX/V Owner's Manual

Figure 4-2. Digital Loopback Test(local/manual)

6.When testing is complete, you may end the test by typing an Escape Sequence (+++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 ATO0 and hit ENTER. If you wish to terminate the call, type ATH0 and hit ENTER to hang up.

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

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. Note: The &T6 command must be set on the remote modem to run this test.

3.Type the Escape Sequence (+++AT<CR>) which brings your modem into Command mode, while still maintaining the connection with the remote modem.

4.Type AT&T6 and hit ENTER. The local modem responds to this command by transmitting an unscrambled marking signal, which causes the remote modem to place itself in Digital Loopback mode. Then the local modem exits Command mode and enters pseudo On- line mode.

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