3Com SuperStack 3 NBX Administrator's Manual page 263

Figure 94 Modify Board Dialog Box — ISDN PRI
5 Scroll through the Channel List to verify that the system lists all
30 channels. Figure 94 shows the first few channels. The channel
numbers appear after the MAC address, separated by a dash.
Example: In the figure, the fourth line appears as:
1...00:e0:bb:04:4e:a5-4 Trunk
The 4 after the dash indicates channel number 4.
6 To change the name of the E1 board, edit the contents of the Board
Name field. This name helps you identify the E1 board in a list.
7 Enable the On Line check box.
8 Click Apply and then click OK.
To connect the E1 line and activate the span:
1 Plug the E1 line into the E1 board.
2 Select ISDN PRI Span List from the Card Type pull-down list.
3 Select the E1 span from the list and click Modify.
4 Click the On Line check box.
5 Click Apply.
Configuring and Managing E1 Digital Line Cards 263