IBM 5280 User's Setup Manual page 135

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56. Continue with the following steps if you have a
communications adapter on your system.
If you do not know if you have a communications adapter, contact
the person who did the planning for your system or the manager of
the area where your system is located. You will also need to know
what type of communications adapter you have for step 60, and what
kind of modem you have for step 62.
If you do not have the communications adapter, go to step
78.
57. Turn the keylock to the left (counterclockwise).
The keylock is a feature that may be on IBM machines 5285 or 5288. Two
keys are shipped with the machine that has the Keylock feature. You will
find these keys in the envelope in which you found this manual. Use the
key that permits you to turn the lock to the left.
58. Move to keyboard 0 and do the following:
a. Make sure that the verification diskette is in diskette drive 4000.
b. Key TeOM after the words Program name.
c. Press the Field+ or Field Exit key.
d. Key 4000 after the words Device address.
e. Press the Enter key.
59. Observe this display.
Select Feature type
i. EIA
3. Integrated Modem
2. DDSA
57-01
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