88 CHAPTER 2: INSTALLING SYSTEM HARDWARE COMPONENTSConnecting a 3ComAttendant ConsoleThe optional 3Com Attendant Console provides attendant (receptionist)access and monitoring for up to 100 extensions per console.Do not Auto Discover the Attendant Console before you have AutoDiscovered telephones and Analog Line Cards. For more informationabout Auto Discover, see “Using Auto Discover for Initial SystemConfiguration” on page 91.To connect a 3Com Attendant Console:1 Connect the power source to the Attendant Console.For information about connecting power to an Attendant Console, seethe packing sheet that ships with the device or “Connecting Power to theAttendant Console” on page 113.2 Connect the Attendant Console to the LAN switch port located on theunderside of the 3Com telephone.You can also connect the Attendant Console to the LAN. It does not needto be connected directly to a telephone.Power overEthernet(IEEE 802.3af)power source3C10400 Connect the powered Ethernet cable directly to the telephone’s Ethernetconnector. No separate power connection is required.3C10120B Devices that predate the 802.3af standard can bepowered by an 802.3af-compliant power supply withthe use of the 3Com Network Jack to NBX PhonePower Module (3CNJVOIPMOD-NBX), which is802.3af-compliant. The module removes power from apowered Ethernet cable and splits it into a power jackand an unpowered Ethernet connection that youconnect to the ATA’s LAN port and power connection.3Com EthernetPower Source:■ 3C10220(12-port)■ 3C10222(24-port)3C104003C10120BThe 3Com Ethernet Power Source predates the 802.3af standard.Any NBX device can be powered by a 3Com Ethernet PowerSource if you use and NBX Power Splitter (3C10223 – package of12). The NBX Power Splitter removes power from a poweredEthernet cable and splits it into a power jack and an unpoweredEthernet connection that you connect to the ATA’s LAN port andpower connection.CAUTION: You can damage an NBX device by using an NBX power splitter (3C10223) with the 3Com NetworkJack Power over Ethernet Multiport Midspan Solution (3CNJPSE24). Use the NBX power splitter (3C10223) onlywith the 3Com Ethernet Power Source (3C10220, 12-port, or 3C10222, 24-port).Table 11 Connecting Power to an NBX Analog Terminal Adapter (continued)Power Source NBX ATA Model Connection Details3CNJVOIPMOD-NBX3C10223
