IBM 3270 Maintenance Manual page 259

3-1100-4
6. Press Y or N (IS AN IBM
COMMUNICATIONS CABLE ATTACHED?)
then press Enter.
The screen message now instructs you to install
the wrap plug on either the Asynchronous
Communications Adapter or the IBM
Communications Adapter Cable.
TESTING - ASYNC COMMUNICATIONS ADAPTER
IS AN IBM COMMUNICATIONS ADAPTER CABLE
ATTACHED TO THE ASYNC ADAPTER (YIN)? Y
INSTALL THE WRAP PLUG ON THE END
OF THE CABLE AND PRESS ENTER?
IS AN IBM COMMUNICATIONS ADAPTER
CABLE ATTACHED?
NO
Go to page 3-1100-6.
YES
Maintenance Information