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→A Sample Application
Before you can establish communication with XYZ, you must select the parameters necessary for proper data exchange with the XYZ computer. To determine these parameters, refer to the section "Preparing to Send/Receive Data" in this manual and to the user's manual(s) supplied by XYZ. Assume that you determine that your Home Computer is to be set at these values:
::::BAUD RATE = 300
::::PARITY = EVEN
::::DUPLEX = FULL
::::RS-232 PRT = #2
::::COLUMN WIDTH = 40
::::AUTO LOG-ON = (no auto log-on)
The parameters are shown on the left side of the COMMUNICATION
SETUP display, and the available options for each parameter are listed
in the center. The default parameters appear on the right-hand side of
the display, with the cursor (a flashing square) on the first entry.
Notice that all the default values except RS-232 PORT and AUTO LOGON
agree with the values required to communicate with XYZ. Press
ENTER three times to accept the first three values. The cursor now
appears to the right of RS-232 PORT. Press 2 to select port #2, and then
press ENTER twice to move the cursor to LOGON.
If you make a mistake, move the cursor back up to the entry by pressing '''FCTN''' [[File:Up-Arrow.png|40px]] (UP). Retype the desired selection, and then press ENTER repeatedly to move the cursor down to LOGON.
At this point, if you were using the module's automatic log-on feature, you would insert the appropriate diskette into Disk Drive One and enter the file name of your log-on program. For this demonstration, however, we are not using the auto-log-on feature. Therefore, simply press '''ENTER''' to accept the default value LOGON.
Once you press '''ENTER''', the module conducts a search for the log-on file. (If you replace the "L" in "LOGON" with a space, the module does not search for the file and beeps immediately to indicate that you have control.) For several seconds, the screen is blank and the keyboard does not respond to any key presses. Once the search is ended, the module "beeps" to indicate that control has been restored to you. You may then continue with the program.
At this point, the computer shows only the cursor in the upper lefthand comer of the display. To begin actual communication with XYZ, dial the telephone number supplied by the data base. When you finish dialing the number, listen for a high-pitched tone, and then correctly place the telephone receiver in the modem cradle. ''Note:'' If you are using the auto-log-on feature, be sure to dial the data base's telephone number when the cursor is on the log-on file name and before you press '''ENTER'''.
