Cisco WRP400-G1 Administration Guide - Page 24

Configuring Your System for ITSP Interoperability Configuring NAT Mapping 2 • If the WRP400 is connected to an Ethernet switch, the switch must be configured to enable Spanning Tree Protocol and Port Fast on the port to which the WRP400 is connected. NOTE Use NAT mapping only if the ITSP network does not provide a Session Border Controller functionality. STEP 1 Start Internet Explorer, connect to the Configuration Utility, and choose Voice > Admin Login. If prompted, enter the administrative login provided by the Service Provider. (The default username and password are both admin.) STEP 2 Under the Voice menu, click SIP. STEP 3 In the NAT Support Parameters section, enter the following settings: • Handle VIA received, Insert VIA received, Substitute VIA Addr: Choose yes. • Handle VIA rport, Insert VIA rport, Send Resp To Src Port: Choose yes. • EXT IP: Enter the public IP address that was assigned by your ISP. Voice tab > SIP: NAT Support Parameters STEP 4 Under the Voice menu, click Line 1 or Line 2 to choose the line interface that you want to modify. STEP 5 In the NAT Settings section, enter the following settings: • NAT Mapping Enable: Choose yes. • NAT Keep Alive Enable: Choose yes. Voice tab > Line N > NAT Settings Cisco Small Business WRP400 Administration Guide 22