Interphase Tech iSPAN 5535 PRI - Manual (Page 78)

Setting Up ISDN PRI Port Properties
58 Interphase Corporation
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 5-2 on page 57). The CRC type depends on the switch
type (whether E1 or PRI) and the country:
• 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 5-1
on page 53).
2. Click the Properties button in the Cards section.
3. On the ISDN PRI Port Properties dialog (shown in
Figure 5-2 on page 57), click Edit DS1 Properties.