IBM 265 Service Manual page 246

Config
Selecting the Config icon causes a list of the adapters requiring configuration to
display.
To use this screen, do the following:
1. Use the arrow keys or mouse to highlight an adapter to configure.
2. Press the spacebar to select the adapter.
3. Highlight the OK icon and press Enter.
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Service Guide
The Config icon allows you to configure network adapters that require setup.
Data Rate
10 Mbps
Full Duplex
Yes
Save
100 Mbps
No
Auto
Auto
Exit