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Issue 2 December 1995 1-1
1
Introduction and Requirements for
Integration
This chapter describes and defines requirements for the NEC NEAX 2400 MCI
switch integration with an INTUITY Messaging System. The chapter includes
diagrams and checklists that show the configuration for INTUITY Messaging
System.
To create an integrated environment between INTUITY Messaging System and
an NEC NEAX 2400 MCI switch, AT&T uses an electronic box called a Switch
Integration Device (SID). The SID operates as a protocol converter between the
switch and the INTUITY Messaging System, converting NEAX 2400 call
information into Simplified Message Desk Interface (SMDI) format and sending
the information to the application. The SID does not restrict any switch features.
For the SID to perform integrated call transactions, the switch must contain a
Message Center Interface (MCI) link. The MCI link provides an RS-232
connection between the NEAX 2400 and the SID. The NEAX 2400 sends call
information to the SID through the MCI link.
All channels reserved for the INTUITY Messaging System must be administered
in a Uniform Call Distribution (UCD) group. The first channel in the UCD serves
as the
forwarding
or central number for INTUITY Messaging System subscribers.
After administering the switch, all covered and forwarded calls transfer to the first
channel or central number of the UCD group. If the first channel is busy, the
system searches through the other members of the UCD group until the system
finds an open channel. Figure 1-1 shows you an example of an incoming call and
the hunting process.