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DEFINITY ECS Release 8.2
Administrator’s Guide
555-233-506
Issue 1
April 2000
Features and technical reference
1401ISDN service
20
National ISDN-2 Services
DEFINITY ECS supports National ISDN-2 (NI-2), which offers many of the
same services as the AT&T Switched Network protocol. The NI-2 protocol is used
when the DS1 circuit pack is administered for Country Code 1, Protocol
Version b.
NI-2 provides users with the following services:
■ Calling Line Identification
■ Non-Facility Associated Signaling (ISDN-PRI only)
■ D-Channel Backup (ISDN-PRI only)
■ Wideband Switching (ISDN-PRI only)
■ Call-by-Call Service Selection
Calling Line Identification
Calling Line Identification for NI-2 is essentially Calling Party Number (CPN)
identification, as previously described.
Non-Facility Associated Signaling (ISDN-PRI only)
Non-Facility Associated Signaling (NFAS) allows an ISDN-PRI T1 or E1
Interface D-channel (signaling channel) to convey signaling information for
B-channels (voice and data) on ISDN-PRI T1 or E1 facilities other than the one
containing the D-channel. See ‘‘
Facility and Non-Facility Associated Signaling’’
on page 1331 for more information.
D-Channel Backup (ISDN-PRI only)
D-Channel Backup is provided to improve reliability in the event of a
signaling-link failure. See ‘‘
Facility and Non-Facility Associated Signaling’’ on
page 1331 for more information.
Wideband Switching (ISDN-PRI only)
Wideband Switching for NI-2 is essentially the same as that of the AT&T
Switched Network ISDN-PRI protocol.
Call-by-Call Service Selection
Call-by-Call Service Selection for NI-2 is essentially the same as that for the
AT&T Switched Network ISDN-PRI protocol.