KX-NS300BX extension cabinet, connected to the KX-NS300BX main cabinet, can be used for up to 3 cabinets using only 1 panel. KX-NS5130X
KX-NS320BX 1 cabinet with 16 internal analog panel (Caller ID) 1 panel to be ready to use
Extend the outside line and the cable in 12 lines outside the 32 lines per cabinet by purchasing additional panels, both digital and analog.
Expandable up to 48 lines outside 130 lines in the purchase of a KX-NS320BX branch cabinet. Can be connected to 3 cabinets by adding an external wire to the requirement. And can be used in conjunction with another 128 IP Phone / SIP Phone / Smart Phone systems (buy additional panels and licenses)
PBX KX-NS300BX. KX-NS320BX Max. 3 units can be connected with KX-NS300BX by KX-NS5130X model card (total one card for total system)
KX-NS-320BX Builtin 16 Analog Ext. with Caller ID & Message Waiting
Max Expansion up to 48 Trunk Lines 130 Extensions by connecting   KX-NS320BX max. 3 units and additional options to a customer requirementAdditional expand max. 128 IP Ext. by option cards and license.
