Read Panasonic KX-TDA620BX Service Manual online
4.3. SYSTEM CONSTRUCTION
4.3.1. Expansion System
Expansion Shelf
The Expansion Shelf contains a BUS-S card for controlling the Hybrid IP-PBX. To use the Expansion system, install a power
supply unit (PSU) in the PSU Slot and optional service cards in Free Slots.
supply unit (PSU) in the PSU Slot and optional service cards in Free Slots.
Construction of the Expansion Shelf
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KX-TDA620BX
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