Panasonic KX-TDA600 - Hybrid IP PBX Control Unit Max. 1008 Ports Installation Manual page 91

2.2 Installation of the Hybrid IP-PBX
Installing Expansion Shelves 2 and 3
Repeat the procedure in "Installing the Basic Shelf and Expansion Shelf 1" for Expansion Shelves 2 and 3.
Expansion Shelves 2 and 3 must be connected to the Basic Shelf using Bus Cables. Therefore, make sure
that Expansion Shelves 2 and 3 are installed so that the Bus Cables can reach the Basic Shelf.
Basic Shelf and Expansion Shelf 1 Expansion Shelves 2 and 3
Shelf installation is complete. Next, it is necessary to connect the shelves.
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