3Com SuperStack 3 NBX Administrator's Manual page 233

Connecting and Managing Analog Devices 233
3 Select one of the items from the list and click Advanced Settings. The
Advanced Settings dialog box (Figure 80) appears.
If you change any of the values in the Advanced Settings dialog box, the
settings you change persist if you later upgrade the NBX system software
or you change the regional software.
Figure 80 Analog Terminal Adapter - Advanced Settings Dialog Box