Testing the Business Modem using S-Resister 16
14-11
Testing Using a
Built-in Test Pattern
(ATS16=4)
The test pattern is available at all speeds. At 300 bps, the Business
Modem's serial port rate must be fixed (&B1) and the link rate fixed at
300 bps (&N1). At rates over 9600 bps, just set the Business Modem for a
fixed serial port rate (&B1).
Starting Testing That Uses the Test Pattern
Ending Testing That
Uses the Test Pattern
Pressing any character key cancels all tests and hangs up the Business
Modem. If you used Register S16, be sure to reset Register S16 and
return to the error-control default. Send
ATZ
or
AT&M4S16=0
to the
modem.
To use the test pattern during
testing with
Command
S-Register 16
AT&M0S16=12
.
The &T test
The test pattern is used for testing
equipment and the phone line.
When S16 is set to 4, the Business
Modem transmits the test pattern
when it connects with a remote
device.
1. Send
ATS16=4
(test pattern command)
2. Send
ATS16=4&T6
.
