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DEFINITY ECS Release 8.2
Administrator’s Guide
555-233-506
Issue 1
April 2000
Features and technical reference
1394ISDN service
20
■ ISDN
ISDN features such as 10-digit number display, QSIG , and path
replacement do not work over IP trunk.
Related topics
Refer to the DEFINITY ECS Administration for Network Connectivity for more
information on managing IP trunks, including complete administration
instructions.
Refer to ‘‘
IP Trunk Configuration Manager’’ on page 724 for detailed descriptions
of all the fields in Configuration Manager.
ISDN service
The Integrated Services Digital Network (ISDN) provides a message-oriented
signaling method that allows information to be sent along with a call and gives
you access to a variety of public and private network services and facilities. The
ISDN standard consists of layers 1, 2, and 3 of the Open System Interconnect
(OSI) model. DEFINITY ECS can be connected to an Integrated Services Digital
Network using standard frame formats: the Basic Rate Interface (BRI) and the
Primary Rate Interface (PRI).
An Integrated Services Digital Network provides end-to-end digital connections
and uses a high-speed interface that provides service-independent access to
switched services. Through internationally accepted standard interfaces, an
Integrated Services Digital Network provides circuit or packet-switched
connections within a network and can link to other ISDN-supported interfaces to
provide national and international digital connections.
NOTE:
DEFINITY ECS Administrator’s Guide does not contain procedures for
working with ISDN trunk groups. Due to the complexity of ISDN
technology and the potential consequences of errors, ask your Lucent
representative to assist you in planning, installing, and administering ISDN
trunks.
Brief description
ISDN supports the following:
■ Call-by-Call Service Selection (CBC)
■ Distributed Communications System (DCS). (Only ISDN-PRI supports
DCS+ and DCS with Rerouting)