- A2SLUA AUTO TELEXCHANGER PCB BOARD
Description
The A2SLUA PCB board is a printed circuit board (PCB) that is part of the HX-72 telephone exchange system manufactured by Hanshin Electronics.It is listed as “Rev: 03”
in several vendor listings, indicating revision 03 of the board.The board is identified with the model code “A2SLUA” (or sometimes
“A2SLUA PCB board”) and is used within the telephone exchange system for
either subscriber line interface / line switching or internal
ystem logic.
Feature And Application of A2SLUA
| Feature |
Application |
|
Based on the system context and typical functions of such boards in automatic telephone exchange systems, the A2SLUA likely has the following features:
-
Subscriber line interface / extension line support: Given the naming (“SL” might stand for Subscriber Line) the board likely handles connection and switching of internal subscriber lines for the HX-72 system.
-
Switching logic support: The HX-72 system uses a microprocessor (IAPX8088) stored-program controlled system with a space-division matrix for switching. The A2SLUA board would interface with that matrix and handle part of the switching tasks.
-
Modular plug-in design: The HX-72 system’s specification emphasises modular boards/cards for extension, trunk, subscriber lines etc. So the A2SLUA is designed to be replaced or added in the unit easily.
- Marine/harsh-environment suitability: Since the HX-72 system is designed for shipboard use (vibration, shock, moisture, corrosion, voltage fluctuations) the A2SLUA board must comply with such conditions.
|
-
Internal telephone exchange in ships / marine vessels: The HX-72 system and its boards (including A2SLUA) are applied aboard ships for cabin extension lines, bridge communications, engine room communications etc. The A2SLUA board supports the subscriber line interfacing in such systems.
-
Automatic switching for internal & external calls: Used in environments where internal subscriber calls, trunk external lines, paging, wake-up calls, priority calls are needed – the board contributes to enabling these via the system.
-
Industrial automation environments: Beyond marine, any industrial setting with robust telephony / communication panels may use the HX-72 system and thus the A2SLUA board.
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Spare/maintenance part: Many listings show the A2SLUA board as a spare or replacement part for HX-72 systems that are in service, especially in older ships or plants.
|
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