IBM 5280 User's Setup Manual page 138

64. Observe this display.
For this system checkout procedure, always use the automatically
selected option of 2.
Does the COMMunications Cable have
a
'TEST/OPERATE' switch? (See Manual)
Opt ions aroe:
1. YES 2. NO
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65. Press the Enter key.
66. Observe this display. Do not press the Enter key.
Prepare the Wrap Connector. (see Manual.)
ENTER to cDntinue.
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User's Setup Procedures 131