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SMC Barricade VOICE ADSL Router - Software Screen Shots
Initial setup of the router is handled nicely by a quick start wizard.
SIP services are easy to configure but make sure you have the right firmware version applied.
The firewall is switched on by default and you can add your own service blocking rules as well.
Custom rules can use a time schedule that determines when they are activated.
USB storage can be added and protected with read and write access passwords.