Ericsson ZAT 19.2 Operation Manual page 275

The Test Timer is set to 40 (seconds) - example 2.
=> Enter:
ATS! 8=40&T1 pel $18=40 Sets the test timer to 40
[seconds
1&T14 Selects Local analogue loopback.
The test indicator lights.
= Write for example:
This is atest .. _-] The same text will appear on the screen. |
The modem answers OK
The test has lasted for 40 seconds and the modem returns to
command state.
If the modem returns the test message to the screen exactly as it
was written, the test is good.