Setting Up ISDN PRI Port Properties
ISDN 2) standard (sometimes referred to as National).
Select AT&T CUSTOM if your telephone company uses an AT&T 5ESS Custom switch.
All of these switch types offer T1/PRI access (also called 23B+D).
•In Europe, select ETSI EUROISDN. This switch type offers E1/PRI access (also called 30B+D).
Selecting the CRC Type (Europe Only)
If your location is Europe, you also need to select the CRC type in the ISDN PRI Port Properties dialog (shown in Figure
•For European countries other than France, select CRC4.
•For France, deselect CRC4.
Editing DS1 Properties (North America Only)
If you have selected an American Switch Type, you can edit the DS1 properties on the DS1 Properties dialog.
To display the DS1 Properties dialog:
1.Select the ISDN port to configure in the Cards section of the WAN Adapters setup dialog (shown in Figure
2.Click the Properties button in the Cards section.
3.On the ISDN PRI Port Properties dialog (shown in Figure
58 | Interphase Corporation |