The N-8000MS is a multi-function master station that connects to an N-8000EX or N-8010EX intercom exchange by a single twisted pair wire. It is capable of full duplex hands-free or handset communication with other full duplex stations. It includes an Alpha-numeric LCD display, one-touch dialing, headset connection and an external speaker connection (.6 W @ 8Ω). External or internal speaker priority is supported. The master station may be wall or desk mounted.