I am going to use IP phone with ADSL service. How could I know which ADSL Router is suitable?
SP3351 series ADSL Router provides more easy way to set up IP phone. On the other hand, SP3350A series ADSL Router provides firewall protection. So please consider if the firewall protection is an issue on your network or not. If yes, SP3350A series will be the better choice. If not, SP3351 series Router will be a convenience device for a small network.