AX-125/145 SIP VoIP Router Quick Installation Guide183.4.2 SIP serverTo set up SIP server information1. From the menu, click VoIP -> SIP Server.2. Configure the following settings:• Server address: Enter the SIP server IP address or domain name forregistration.• Registration expiration: Assign a time interval value for SIP re-registration.AX-125/145 will send out registration packets again when it reached this timeinterval.• Domain name: Enter the domain realm for SIP registration if the SIP serverrequests this parameter.• Outbound proxy address/Port: If your SIP server provider use “Outboundproxy” to relay SIP packets, enter the outbound proxy server IP address ordomain name and the port number it uses.• Phone number/Display name: These parameters are provided by yourInternet Telephony Service Provider (ITSP), the SIP server will use it as yourphone number caller ID.• User name/Password: These parameters are also provided by your ITSP,and they are used for registration authentication.