IBM 3270 Manual page 222

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3274 Model 5JC with a 1200-BPS Integrated Modem Attached to
a Nonswitched Line with Switched Network Backup (SNBU) and
Manual Answer ( U. S. and Canada Only)
D
D
Plug the four-prong plug attached to the communication cable marked
NONSWITCHED into the four-pin receptacle connected to the nonswitched line.
Plug the four-prong plug attached to the communication cable marked
SWITCHED into the four-pin receptacle connected to the data coupler.
Label-NONSWITCHED
3274 Model 51 C
To Nonswitched
Line
To Data Coupler
Note: It is recommended that:
• The four-pin receptacle from the data coupler (Type CBS or CDT, or FCC-certified
equivalent) be labeled SWITCHED LINE.
• The four-pin receptacle from the nonswitched line be labeled NONSWITCHED LINE.
Appendix F. 3274 Communication Cables
F-13<