Ericsson ZAT 19.2 Operation Manual page 281

=> Enter: —
The modem answers
'J&TO terminates the test.
OK Test terminated
If the modem echoes the test message to the screen exactly as
written, the test is good.
Test timer set to 40 (seconds) - example 2
Loe |The modem returns to command state. |
The modem answers OK_ Ready to continue.
$18=40 sets the test timer to 40 seconds
&T6_ selects remote digital loopback
-| Test indicator lights.
e oe | The same text will appear on the screen. |
The modem answers OK _ Test terminated.
The test has lasted for 40 seconds and the modem returns to
the command state.