Multi-Tech Systems MT5600ZDX - Manual (Page 62)

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Model MT5600ZDX
Figure 4-2. Digital Loopback Test
(local/manual)
6. When testing is complete, you may end the test by typing an Escape
Sequence (+++) 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/
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. Note: The &T6 command must be
set on the remote modem to run this test.
3. Type the Escape Sequence (+++) 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.
5. Type data from your keyboard. For this test, typing multiple upper