
Configuring Dial Services
C-2
Ordering ISDN Primary Rate Interface (PRI) Lines
When ordering ISDN PRI lines for use in the United States, note the following:
• The switch must be a DMS-100, AT&T 5ESS, or AT&T 4ESS switch.
• Configure all 23 B channels for Circuit Switched Data (CSD).
• Configure the D channel for signaling only.
• You cannot run the National ISDN-2 (NI-2) protocol.
Table C-2. BRI Parameters for Northern Telecom DMS-100
Parameter Value Notes
Signaling Functional
Protocol Version 1 or 2 1 is NT1 Custom,
2 is NI-1 (National ISDN-1)
TEI Assignment Dynamic
Maximum # of Keys 3 Any number equal to or greater than 1 will
work
Release Key is N or a Key
Number
No Not relevant for proper operation
Ring Indicator is Y/N No Not relevant for proper operation
EKTS is Y/N No
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