For KX-UT Series SIP Phones• Using a DHCP server (DHCP Server feature or an external DHCP server) to automate the assignmentof IP addressing informationThe DHCP server automatically assigns the IP address of the SIP phone, the subnet mask address, andthe default gateway address to the SIP phone.The PBX’s IP address can also be assigned automatically to the SIP phone in the process of beingregistered to the PBX. For details about registering the SIP phone, refer to "4.3.2 Registering IPTelephones".NoteFor information about the DHCP Server feature, refer to "8.1.2 DHCP (Dynamic Host ConfigurationProtocol) Server" in the Installation Manual.• Not using a DHCP server (DHCP Server feature or an external DHCP server) when assigning IPaddressing informationOnly the PBX’s IP address can be assigned automatically to the SIP phone in the process of beingregistered to the PBX. For details about registering the SIP phone, refer to "4.3.2 Registering IPTelephones".The IP address of the SIP phone, the subnet mask address, and the default gateway address must beassigned manually.For instructions, refer to the documentation of the SIP phone.Note• When the PBX is not in the same network as the SIP phone, the IP address of the PBX must beassigned manually. For instructions on manually setting PBX network information, refer to"Assigning the IP address of the PBX to a SIP phone" in "5.7.1 Assigning IP AddressingInformation" in the Installation Manual.• When assigning IP addressing information to the SIP phone, do not use the phone’s Web userinterface programming.For Non-KX-UT Series SIP Phones (including P-SIP)• Using a DHCP server (DHCP Server feature or an external DHCP server) to automate the assignmentof IP addressing informationThe IP address of the SIP phone, the subnet mask address, and the default gateway address can beassigned to the SIP phone automatically by the DHCP server.The PBX’s IP address must be assigned manually on the SIP phone side.For instructions, refer to the documentation of the SIP phone.• Not using a DHCP server (DHCP Server feature or an external DHCP server) when assigning IPaddressing informationAll of the IP addressing information must be assigned manually.For instructions, refer to the documentation of the SIP phone.Note• A SIP phone can only receive IP addressing information from a DHCP server on its own LAN.Therefore, when SIP phones are located on several LANs, a DHCP server is required on eachLAN.• When the DHCP client function is enabled for SIP phones, simply connect them to the LAN to usethe DHCP server. For details about the DHCP client function setting, refer to the documentation ofthe SIP phone.Getting Started 514.3.1 Assigning IP Addressing Information