36 CHAPTER 1: INTRODUCTIONNBX ExpansionChassisTo connect extra cards to an NBX system, you can add an NBX expansionchassis to your network. Typically, you add the expansion chassis on thesame subnet as the NCP and then use the Auto Discover feature to addnew cards to the NBX database.V3000 Gateway ChassisThe V3000 Gateway Chassis (3C10605A) contains four card slots so thatyou can connect optional interface cards to your NBX system. Tworedundant uplink ports provide 10/100 Mbps switched Ethernetconnections. Use the upper port to connect to the LAN. The lower port isnormally inactive and becomes active only if the upper port experiences alink failure. Both ports show a positive link status even though only oneport at a time is active.CAUTION: The power cord is the disconnect device. The power outletmust be near to the unit and easily accessible.Using disk 1 only N/A Off OnSynchronizing — disk 0 is valid, disk 1 is becoming afully mirrored disk. LED 3 flash rate indicatesprogress.If LED 3 stops normal flashing and intermittentlyflashes twice, the mirroring process has failed.N/A On FlashingSynchronizing — disk 1 is valid, disk 0 is becoming afully mirrored disk. LED 2 flash rate indicatesprogress.If LED 2 stops normal flashing and intermittentlyflashes twice, the mirroring process has failed.N/A Flashing OnLED 2 and LED 3 flash alternately: the two disks areresynchronizingN/A Flashing FlashingSynchronized N/A On OnExplanation S1 S2 S3
