IBM B50 - Manual (Page 88)

Selecting the Full Duplex option allows you to change how the Ethernet adapter
communicates with the network:
.----------------.
| Full Duplex
|
| 1. Yes |
| 2. No |
| 3. Auto |
----------------'
Select Ping from the Network Parameters menu to test a connection to a remote
server. After selecting the Ping option, you must choose an adapter to communicate
with the remote system.
Interface
1. Ethernet
2. Token Ring
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3-36 7046 Model B50 User's Guide