AT&T 7400B Plus User Manual page 175

DEFINITY Communications System
7400B Plus Data Module
User´s Guide
Setting up a loopback data
test arrangement
The Loopback Data Test Arrangement does not require special
switch administration over and above the normal switch
administration procedure for a 7400B Plus. If additional
information is necessary, reference the following documents:
The 7400B Application Notes for System 75 and Generic 1.1,
(555-209-017)
System 85 and DEFINITY Generic 2 Terminals and Adjuncts
Reference (555-015-201) or the System 85 and DEFINITY Switch
Administration Procedures (555-104-506). 7400B Application
Notes for System 85 and DEFINITY Generic 2,
If the Loopback Data Test Arrangement is being used to test
modem pools (see Figure B), separate 7400B Plus Data Module's
must be setup for each modem pool group to be tested. Separate
telephone numbers should be administered for the Loopback Data
Test Arrangements used for modem pool testing.
The 7400B Plus must be connected to the PBX and powered up
prior to using it in the Loopback Data Test Arrangement. Connect
an asynchronous data terminal to the RS-232 port of the 7400B
Plus. The speed of the terminal should be set as follows:
ACCESS
on site
1200bps, 300bps modem pool
2400bps, 1200bps, 300bps modem pool
9600bps, 4800bps, 2400bps, 1200bps modem pool
9600bps, 4800bps modem pool
Once the data rate has been set on the terminal type in the
following commands:
AT&FS0=1E0Q1&W0&W1
You should now disconnect the terminal from the 7400B Plus. The
7400B Plus will retain the option settings during loss of power.
APPENDIX D: LOOPBACK DATA TESTS
TERMINAL DATA
Page D-3
RATE SETTING
19200bps
1200bps
2400bps
9600bps
9600bps