Installation Questions 57■ 3Com 3101, 3101SP, 3102, and 3105 devices support Power overEthernet (PoE). They do not come with AC power adapters. You canpower these devices with any IEEE 802.3af-compliant power source orwith optional AC power adapters. The packing sheet that ships witheach device shows the device power options.What ExternalDevices Can Connectto an NBX System?The following devices can be connected to an NBX system:■ Music-on-hold device, such as a radio, tape player, disk player, orcomputer sound card, equipped with a line out (600 ohm) connectioncan be connected directly into the Call Processor to provide audio forcallers waiting on hold.■ Third-party 10BASE-T or 100BASE-T Ethernet hubs and switches. In aSuperStack 3 NBX system, you can connect the Ethernet 1 port on theSuperStack 3 NBX Call Processor to an external 10BASE-T or100BASE-TX compliant hub. You can connect the Shared Ethernetport or the upper switched 10/100 Mbps Ethernet port to an external10BASE-T or 100BASE-TX compliant hub.If you are connecting third-party routers or switches to the NBX system,be sure that the connection is programmed for half-duplex operation.■ Multiple NBX Hub or Uplink cards (NBX 100). In an NBX 100 system,you can use the BNC (Hub cards only) or 10BT Uplink connector on aHub or Uplink card or on the Network Call Processor to connect to anexternal 10BASE-T compliant hub.■ An ISDN (Integrated Services Digital Network) router, Frame RelayAccess Device (FRAD) router, or Voice Over IP gateway.■ A WAN. You can access NBX systems located at branch officesthrough a wide area network (WAN). Before you use the NBX systemfor voice over the WAN, verify that the WAN offers adequatebandwidth, and that the gateways can be configured to provide thecorrect routing information.■ External paging amplifier. Both the NBX 100 Call Processor and theSuperStack 3 NBX Call Processor include an RJ-11 jack to connect anexternally powered paging amplifier.■ Standard telephone for power-fail situations. In the United States, youcan connect a standard POTS (Plain Old Telephone Service —2500-series compatible) telephone to an RJ-11 connector on the frontof an NBX Analog Line Card.
