NEC ND-70895 (E) system manual Concept of MSF

SYSTEM OUTLINE

System Outline

2.2.1Facilities

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)

Key operation

Terminal (Dterm)

NEAX2400 IMX

MSF

The Computer

AP

(Setting of Communication Path)

Figure 2-2 Concept of MSF

Note: The external computer is referred to as the computer.

CHAPTER 2 ND-70895 (E)

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Revision 1.0