IBM RT PC Problem Determination Manual page 148

Communication Utilities
3-12 Problem Determination Guide
The Communication Utilities contain the following exercise:
Utilities for use with Ethernet1 .
The Utilities for use with Ethernet is used to exercise the
Baseband Adapter and parts of the Ethernet Network. The utility
will work with a wrap plug or with any valid Ethernet Network.
Ethernet is a registered trademark of Xerox Corporation.