NEC Neax 2400 Imx Oai System Manual

							ND-70895 (E) CHAPTER 1
Page 1
Revision 1.0
CHAPTER 1 INTRODUCTION
1. General
This manual describes the outline, installation procedure/installation tests, and various phases of maintenance
work of an OAI (Open Application Interface) system which realizes the NEAX2400 IMX and a computer
system.
2. How to Follow the Manual
2.1 Configuration of This Manual
Configuration of this manual is shown in Table 1-1.
Table 1-1 Configuration of This Manual
CHAPTER TITLE CONTENTS
2 SYSTEM OUTLINEThis chapter describes the concept, function and configuration of the 
NEAX2400 IMX OAI System
3INSTALLATION 
PROCEDUREThis chapter describes the installation procedure for NEAX2400 IMX 
OAI System
4 COMMANDSThis chapter describes the commands that are used in NEAX2400 IMX 
OAI System
5 OFFICE DATA DESIGNThis chapter describes the procedure for setting the office data required 
in NEAX2400 IMX OAI System
6 MAINTENANCEThis chapter describes the maintenance, fault diagnosis and fault repair 
procedure of NEAX2400 IMX OAI System 
						

							CHAPTER 1 ND-70895 (E)
Page 2
Revision 1.0
INTRODUCTION
How to Follow the Manual
2.2 Related Reference Manual
The installation tasks for the NEAX2400 IMX OAI System consist of those related to the NEAX2400 IMX
system and those related to the OAI functions. Since this manual describes the tasks pertaining to the OAI
functions, it must be used together with the following manuals that describe tasks pertaining to the NEAX2400
IMX itself when performing tasks pertaining to the NEAX2400 IMX OAI System.
Table 1-2 Related Reference Manual
MANUALS FOR NEAX2400 IMX RELATIONSHIP WITH THIS MANUAL
Installation Manual
When performing installation and installation tests of the NEAX2400 IMX 
OAI System, these manuals are to be used together with Chapter 3, INSTAL-
LATION PROCEDURE and also with “Circuit Card Manual”.
Feature Programming Manual
System Operations and Maintenance 
ManualWhen performing maintenance jobs on the NEAX2400 IMX OAI System, this 
manual is to be used together with Chapter 6, MAINTENANCE of this man-
ual.
Office Data SpecificationWhen performing installation tests and maintenance jobs on the NEAX2400 
IMX OAI System, this manual is to be used together with Chapter 4, COM-
MANDS of this manual. 
						

							ND-70895 (E) CHAPTER 2
Page 3
Revision 1.0
CHAPTER 2 SYSTEM OUTLINE
1. General
This chapter describes the concept, functions, and configuration of the NEAX2400 IMX OAI System.
Before performing installation and/or maintenance of the NEAX2400 IMX OAI System, read this chapter 
carefully.
The contents of Chapter 2 are outlined below.
 System Outline
Explains the outline of the OAI system
 System Configuration
Explains the configuration of the OAI system
Interface with External Computer (General-Purpose Information Processing Equipment)
Explains the conditions for interface with external computer, and use of the related circuit cards 
						

							CHAPTER 2 ND-70895 (E)
Page 4
Revision 1.0
SYSTEM OUTLINE
System Outline
2. System Outline
2.1 OAI (Open Application Interface) System
1. The OAI system is the interface that joins a variety of facilities of the NEAX2400 IMX to the application
programs of the external computer (general-purpose information processing equipment) of the user.  
2. The NEAX2400 IMX can be controlled by the external computer through the OAI system.  
3. The OAI system diversifies the information processing functions of the NEAX2400 IMX, thus offering
users’ unique added values.
4. For implementing the OAI system, an Interface Processor (IP) is provided to the NEAX2400 IMX.  
5. The IP controls the communication protocol between the NEAX2400 IMX and the UAP (User’s
Application Processor of the external computer) in accordance with the basic reference model of the Open
Systems Interconnection (OSI) standardized by the ISO (
Note).
Note:International Organization for Standardization (ISO)
2.2 Software Structure in the OAI System
The software structure in the OAI system is shown in Figure 2-1. So far, the software structure of the
NEAX2400 IMX is generally categorized into three major blocks: Input Processing Block, Internal Processing
Block, and Output Processing Block. When the Input Processing Block detects a call, the Internal Processing
Block analyzes and identifies the call. In accordance with the result of this processing, the Output Processing
Block executes required switching operations, controlling of lamps/keys, etc. To meet these processing
requirements, a conventional arrangement is made every time a request for the application software arises. The
modules of the Input Processing Block and the Output Processing Block are replaced with those corresponding
to such a request. However, in the case of the OAI system, each unit function to be made available for the
computer in the Input Processing Block and the Output Processing Block is defined as a facility (each slant lined
portion in Figure 2-1) in advance, so that each of these facilities may be directly controlled by the external
computer through the OAI interface. For example, the key information input by processing of key receiving is
not processed within NEAX2400 IMX, but is analyzed by the external computer. As a result of this processing
by the external computer, all the related messages are shown on a digital display and a lamp display at
corresponding terminals. In other words, the OAI interface has released the function of the conventional internal
processing to the external computers. 
						

							ND-70895 (E) CHAPTER 2
 Page 5
Revision 1.0
SYSTEM OUTLINE
System Outline
Figure 2-1   Software Structure in the OAI System
Input Processing 
Block
Digit Count
Key  
Receiving
Other I
Off-Hook/ 
On-Hook 
Monitor
Other I
Queue
Internal 
Processing Block
Digit 
Analysis
Queue
Key 
Analysis
Trunk 
Selection
Subscriber 
Class 
Identification
Switch 
Selection
Other l
Other mOther n
Other l
Output Processing 
Block
Switch Control
Digit Display
Lamp Display
OAI Interface
Processing by External Computer
portion is
the unit function 
(partial) to be 
released by the OAI 
system. 
 Equivalent to the 
internal processing 
of the NEAX2400 IMX 
 
Note: 
						

							CHAPTER 2 ND-70895 (E)
Page 6
Revision 1.0
SYSTEM OUTLINE
System Outline
2.2.1 Facilities
Each of the unit functions of the NEAX2400 IMX, such as switch control function, terminal control
function, etc.,  that can be controlled by the application of the computer is referred to as “facility”. The
facilities can be categorized in two kinds as per the operating pattern; one is “Provider Facility” and the
other is “Performer Facility”.
 Provider Facility
A facility of this kind is capable of communicating with one Application Program (AP) on the
computer, and executes start-up, etc. of an AP on the computer.
 Performer Facility
A facility of this kind is capable of communicating with plural application programs (AP) on the
computer. It is activated from each AP as the common facility and executes required processing in
accordance with the control information given from the AP.
Each of the main facilities is outlined in the following.
1. Provider Facilities
(a) Terminal Mode Set Facility (MSF)
With a specific key depressed on a terminal, this facility sets terminal mode. When terminal mode is 
set by this facility, a communication path is set up between the terminal and the AP on the computer. 
(Figure 2-2)
Figure 2-2   Concept of MSF
Note:
The external computer is referred to as the computer.
Key operation
Terminal (D
term)
MSF
NEAX2400 IMX
AP The Computer
(Setting of Communication Path) 
						

							ND-70895 (E) CHAPTER 2
 Page 7
Revision 1.0
SYSTEM OUTLINE
System Outline
(b) Terminal Multiple Information Transfer Facility (TMF)
This facility executes batch transfer of dial number information entered from a terminal, card 
information provided from the card reader, etc. to the AP. (Figure 2-3)
Figure 2-3   Concept of TMF
(c) Call Event Transfer Facility (ETF)
This facility edits the detailed data (call duration, etc.) pertaining to calls at terminals accommodated 
in the NEAX2400 IMX, and provides the edited information to the computer. (Figure 2-4)
Figure 2-4   Concept of ETF
Dial, key, card input
Terminal (D
term)
TMF
NEAX2400 IMX
AP The Computer
(Batch Transfer)
Card Reader
Terminal (Dterm)
ETF
NEAX2400 IMX
AP The Computer
(Transfer of Call Detailed Information)
(Starting) 
						

							CHAPTER 2 ND-70895 (E)
Page 8
Revision 1.0
SYSTEM OUTLINE
System Outline
(d) Authorization Code Facility (ACF)
Upon accepting a connection request and/or a service request from a terminal, this facility transfers 
the ID code of that specific terminal to the AP and also executes either connection processing or 
connection restricting processing in accordance with the restriction class information returned from 
the computer. (Figure 2-5)
Figure 2-5   Concept of ACF
(e) Free Location Facility (FLF)
This facility establishes the correspondence between the extension number allocated to a terminal 
and the user’s unique ID code in accordance with the number conversion information provided from 
the AP. (Figure 2-6)
Figure 2-6   Concept of FLF
(ID code input)
ACF
NEAX2400 IMX
AP The Computer
Terminal  
(D
term)(Answer)
(Starting)
Note:  Connection Processing or Connection Restricting Processing
FLF NEAX2400 IMXAP The Computer
(Extension Number/ID Code Conversion Information) 
						

							ND-70895 (E) CHAPTER 2
 Page 9
Revision 1.0
SYSTEM OUTLINE
System Outline
2. Performer Facilities
(a) Terminal Control Facility (TCF)
This facility controls the LCD, LED, etc. on a terminal concerned as per a control order provided by 
the AP.  It also activates the KTF, NTF, and CRF upon receiving a data read request provided from 
the AP. (Figure 2-7)
Figure 2-7   Concept of TCF
(b) Key Code Transfer Facility (KTF)
When a terminal concerned is on the terminal mode, this facility transfers the key code information 
from that specific terminal to the AP. (Figure 2-8)
Figure 2-8   Concept of KTF
TCF NEAX2400 IMXAP The Computer
(KTF, NTF, 
CRF, etc.)
(Control of LED, LCD, Chime, etc.)
AP
TCF
LCD
(Activation of Other Facilities) Terminal (Dterm)
LEDLCD Control
Terminal (Dterm)
KTF
NEAX2400 IMX
AP The Computer
(Key Code Information Transfer)
Key input 
						

							CHAPTER 2 ND-70895 (E)
Page 10
Revision 1.0
SYSTEM OUTLINE
System Outline
(c) Dial Number Transfer Facility (NTF)
When a terminal concerned is on the terminal mode, this facility transfers the dialed number 
information from that specific terminal to the AP. (Figure 2-9)
Figure 2-9   Concept of NTF
(d) Switch Control Facility (SCF)
This facility executes the processing of an outgoing connection or of releasing the connection 
between a terminal and another in accordance with the connection control information provided from 
the AP. (Figure 2-10)
Figure 2-10   Concept of SCF
Dial number input
Terminal (D
term)
NTF
NEAX2400 IMX
AP The Computer
(Dial Number Information Transfer)
SCF NEAX2400 IMX The Computer
(Processing of Outgoing Connection/Connection Release)
Terminal (D
term)
AP