The Master is the apex of the hierarchy and has the ability to view the entire system. The Master controls all underlying Scanners that manage the scanning algorithm. 

The Master includes an SNMP agent that allows the management software to receive all relevant data. It collects, saves and transmits connectivity data from the Scanners via the Expanders and updates the EZ-View for the Enterprise management station.The Master can monitor up to four communication rooms.

The maximum length of a copper cable connecting the Master to the Expander is 1,200m/4,000ft.  Each one of these DOWN LINK ports represents a site.