User's Manual

SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
eNfusion® HSD-440 Mark 2 Terminal
23-15-30 1-15
3 JUN 10
The HSD-440 Mark 2 Terminal supports three MCDUs.
B. WSC
The WSC is a device that uses an ARINC 429 interface per ARINC 741 Part 2 Attachment
2F-42.1, which provides display functions similar to the MCDU. For more information
about the WSC, see the WSC manufacturer’s documentation and ARINC 741 Part 2
Attachment 2F-42.1.
C. Remote Reset
The remote reset output provides an external reset function for the complete HSD-440
Mark 2 Terminal. Pressing the momentary normally open (NO) switch resets the system's
processor-card circuitry.
The remote reset has the same function as pressing the test button on the front panel of
the terminal.
D. ISDN Circuit-Switched Data Interface
HSD-440 Mark 2 Terminals connect to a variety of interface options. The physical
interface for ISDN BRI service is EURO S/T, which supports several types of connections
to user equipment.
HSD-440 Mark 2 Terminals provide one ISDN S/T bus interface which is capable of
hosting up to six external physical connections to EURO ISDN devices.
The ISDN BRI S/T bus accesses only the Swift 64/SBB channel card. In SBB mode, the
interface provides one SBB circuit-switched connection. In Swift 64 mode, the interface
provides two Swift 64 circuit-switched connections. If the channel is busy or in-call, the
request for service is denied.