Total Control MP/16, Operator'S Manual

Page: 159 / 182

Modem Testing E-9
receives the +++ escape code. Issue the ATH command to end
AL mode.
4
Reset the mode m to Data mode, S16=0, and error control
(&M4), or issue the ATZ (reset) command.
Dial Test
 
S16=2
The Dial Test is used for factory testing the frequencies of tone
values. When S-Register 16 is set to 2 and a single tone is dialed
(e.g., ATD7 <Enter>), the modem continues to transmit that tone
until you type another Carriage Return.
Test Pattern
 
S16=4
The test pattern can be used instead of your typed data during
Analog Loopback (AL) or Remote Digital Loop back (RDL), using
&T commands or S16. The test pattern is available at all speeds.
At 300 bps, the 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 modem for a fixed serial port rate (&B1).
To use the test pattern during AL testing with S16, type the follow -
ing command. The test pattern is sent through the loopback.
AT&M0S16=5D
To use the test pattern during RDL testing with S16, type the
following command:
AT&M0S16=12
To use the test pattern with the &T AL or RDL tests, insert the test
pattern command, S16=4, before issuing the test command. The
first of the following commands initiates AL, the second RDL:
ATS16=4&T1
ATS16=4&T6
The test pattern alone (ATS16=4) is used for testing equipment and
the phone line. When S16 is set to 4, the modem transmits the test
pattern upon connec tion with a remote modem.