Panasonic KX-NS300 Pc Programming Manual page 299

9.33 PBX Configuration—[1-1] Configuration—Slot—Expansion Unit1/Expansion Unit2/Expansion Unit3
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3: Expansion Unit2
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4: Expansion Unit3
Slot: The physical slot number within the Expansion Unit where the card is installed.
Programming Port Properties for cards installed in Expansion Units
To change the status of a port when programming via Web Maintenance Console, click the desired cell in
the Connection column, and then select INS or OUS for the port.
PC Programming Manual 299