Ositech comm Trumpcard Data/Fax Modem - Manual (Page 81)

User’s Guide and Reference 5- 3
Modem Test Procedures
Local Analog Loopback
This test checks the path between the local Modem and the PC. The test
is only functional when the Modem is in direct mode (&Q0) and the COM
port baud rate is set to 14400 bps (Trumpcard 14400) / 28800 bps
(Trumpcard 28800) or less.
To start this test, the Modem must be in command mode.
To run this test:
1. Enter AT&T1 [ENTER] . Wait until the Modem returns a CONNECT
message.
2. Enter a test message. For example, “This message should be
echoed back.”
The message should immediately appear on the screen as you enter
it.
3. Enter +++ (the escape sequence).
The Modem will respond with OK . The Modem is now in command
mode.
4. Enter AT&T0 [ENTER] to end the test.