IBM 5280 User's Setup Manual page 160

d. Notify your supervisor that you have completed setup.
5. You have the 1200 bps integrated nonswitched (38 LS)
communications line. Do the following:
a. Remove the wrap connector by pulling straight out.
Wrap Connector
b. Put the wrap connector in the protective recess area of the machine
verification binder.
c. Push the connector into the telephone line socket.
~ TelePhone
Line Socket
~ ~
(it is probably located
",,' 0 ()
on or near a wallo)
"
()
",
/ '
/ '
Connector
Note: The telephone line socket should have been connected prior to
setup. If it has not been, contact your supervisor who will notify the
person familiar with the local electrical codes and responsible for
telephone line connection.
d. Notify your supervisor that you have completed setup.
User's Setup Procedures 153