IBM 3270 Manual page 224

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3274 Model SIC with a 1200-BPS Integrated Modem Attached
to a Nonswitched Line with Switched Network Backup (SNBUJ
and Auto-Answer ( U. S. and Canada Only)
D
D
Plug the four-prong plug attached to the communication cable marked NON-
SWITCHED into the four-pin receptacle connected to the nonswitched line.
Attach the communication cable's color-coded wires to the data coupler, as shown
in the following table and diagram .
....
,,_
Coupler Wire
Terminal
Color
Telephone Company-Provided
CBS Data Coupler or
DR Black
FCC-Certified Equivalent
OT White
RI Violet
DA
OH OT
OH Blue
CCT Brown
DA Yellow
SG Gray
SH Red
~
~ ~
~
~
~
~
~ ~ ~
SH SG CCT
RI DR
K 7
..)
\...
3274 Model 51 C
To Nonswitched
Line
Label-NONSWITCHED
Appendix F. 3274 Communication Cables
F-lB