IBM 3274 User Manual page 41

Alt IML
Address
8 4 2 1
0000
D
a
11
Transmit Level Line
X~~j
:
IBI4 1
0
I
g g
1--------;-0
Figure 1-14 (Part 1 of 2). 3274 Model 51C Operator Panel with the
1200-bps Integrated Modem Feature and with
either (1) the Switched Line with Manual
Answer Feature or (2) the Nonswitched Line
with SNBU and Manual Answer Feature; and
with the Encrypt/Decrypt Feature
1-30