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(Depending on the DSL provider’s recommendations, you may or may not want to use DHCP.) 4. Configure the Alti-IP 600H phone’s AltiWare address. 5. If NAT server is used, access NETWORK settings in the configuration menu. Change ENABLE NAT setting to YES and assign the NAT server’s public IP address in the NAT Address setting. 6. If configuring with an H.323 NAT router, the NAT router can forward IP traffic to a specified private IP address based on the destination port in the TCP/IP or UDP packe