When the user employs switching technology, the device provides five 10/100 Mbps shielded RJ-45 ports. Each port supports the auto-negotiation protocol in order to select data rate, duplex and flow control. All five ports are auto-MDI/X compliant, such that any port can function as an uplink port to another switch, omitting crossover cables in the field. Once power is removed and reapplied, the BAS Switch will return to operation without fail. The $150/unit device can be powered from an unregulated DC power source (10-36 V) or from an AC power source (8-24 V, 47-63 Hz), and is UL 508 Listed for industrial control equipment.