158 CHAPTER 9: C ONFIGURING IP TELEPHONY7 In the IP Settings dialog box, specify the IP settings for this device. The IPSettings dialog box shows two groups of IP settings:■ IP Settings Reported by Device — Typically, if you are configuring anew telephone, you see 0.0.0.0 in each of the IP address, DefaultGateway, and Subnet Mask fields. Note that if a telephone has an IPaddress, default gateway, and subnet mask, you cannot change thosevalues using the NBX NetSet utility.■ Manually Assigned IP Settings — Use these fields to configure theIP settings for the telephone. You can change an IP setting only if thecorresponding field under IP Settings Reported by Device is 0.0.0.0. Ifthe field contains a value other than 0.0.0.0, you can change thevalue only through the telephone buttons. See the next section.Manually assigned settings take precedence over settings assignedautomatically by DHCP. If you manually enter the IP settings for atelephone using the telephone key pad, these settings replace anysettings supplied by a DHCP server, and the telephone no longer searchesfor a DHCP server when it is plugged into a network.8 Click OK.The Ethernet (Layer 2) communications between the NCP and thetelephone ensure that the telephone receives the IP address of the NCP aspart of the configuration.Entering Data Usingthe Telephone KeyPadYou can program IP configuration directly into a telephone using thetelephone Local User Interface (LUI) utility.You can start the LUI utility on any 3Com telephone by cycling power tothe telephone, and then starting the utility before the telephone finishesits download sequence. Each telephone has a different method ofstarting the LUI utility:■ For the 3102 Business Telephone, press■ For the 3101 and 3101SP Basic Telephones, press the center selectbutton:■ For the 1102, 2102, and 2102-IR Business Telephones, press
