Configuring IP Telephony 187Appendix C, “Configuring Option 184 on a Windows 2000 DHCPServer,” in the NBX Administrator’s Guide.The methods for configuring special options vary depending on the DHCPserver, and the example in the NBX Administrator’s Guide may not applydirectly to your DHCP server. For assistance, contact your networkadministrator, the vendor of the DHCP server, or a qualified 3Com servicerepresentative.Configuring AnalogLine Card Port IPSettingsTypically, your analog line card ports reside on the same subnetwork asthe NCP. If you use IP On-the-Fly, or if you use Standard IP with DHCP, IPconfiguration is automatic. Verify that your server has enough addresses.However, if you are using Standard IP without DHCP, you must manuallyconfigure the IP settings for each line card port.To manually configure IP settings for line card ports:1 Log in to the NBX NetSet utility using the administrator username andpassword.2 If you have not already done so, use the Auto Discover feature to add linecard ports to the configuration database. For more information see“Configuring a Line Card Port” in the NBX Administrator’s Guide.3 Click PSTN Gateway Configuration > Analog Line Cards.4 Select a line card port from the list by clicking its extension, and then clickthe IP Settings tab.Configuring T1, E1,and BRI Channel IPSettingsIf all digital line cards reside on the same subnetwork as the NCP, and youare using IP On-the-Fly or Standard IP and DHCP, IP configuration isautomatic. If you are using Standard IP without DHCP, you must manuallyconfigure the IP settings for T1, E1, and ISDN BRI cards.3C10165D E1 cards and 3C10116D T1 cards can be installed in a remotelocation and communicate with the NCP over a routed network. Forinformation on how to configure these cards for remote operation, seethe NBX Administrator’s Guide.3C10165D E1 Digital Line Cards and 3C10116D T1 Digital Line Cards donot support DHCP lease times of less than 20 minutes.
