IBM V03 Maintenance Information page 31

Model V03 with serial card
v When the Model V03 has a serial card installed, it displays Parallel Attachment on the Operator's Panel.
v When one cycles through the options found by pressing the Menu key, the Configuration Menu should
appear:
Table 2.
Configuration Menu
Parallel and Serial Configuration
This is an indication that the printer recognizes the serial card.
v When data is received on the serial port and printing begins, the display will change to Serial.
Chapter 1. Diagnosing problems
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