Avaya Communication Manager Administrator's Manual page 1584

Feature Reference
ISDN service
Access to Switched Digital International
Switched Digital International (SDI) provides 64 kbps of unrestricted connectivity to international
locations via the AT&T Switched Network. It is also the backbone for the AT&T International ISDN
network. SDI complements the ACCUNET digital service already available to United States locations.
This service can be accessed using Call-by-Call Service Selection. SDI provides economical high-speed
data transfer to international locations.
National ISDN-2 Services
Avaya Communication Manager 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 CPN identification, as previously described.
Non-Facility Associated Signaling (ISDN-PRI only)
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
information.
D-Channel Backup (ISDN-PRI only)
D-Channel Backup is provided to improve reliability in the event of a signaling-link failure. See
and Non-Facility Associated Signaling
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.
1584
Facility and Non-Facility Associated Signaling
on page 1536 for more information.
Administrator's Guide for Avaya Communication Manager
on page 1536 for more
Facility
November 2003