The Draytek Vigor2820Vn is an ADSL2+ router with a 2nd Ethernet WAN. This 2nd WAN can connect to DSL/Cable modem or fiber media converter for policy-based load-balance, fail-over and BoD. It also features advanced bandwidth control mechanisms such as IP-layer QoS, NAT Session Limitation, Bandwidth Borrowed, etc., to allow easy, flexible and reliable access control and bandwidth management. With hardware-based implementation of the VPN protocol, the Vigor2820Vn supports up to 32 VPN tunnels using advanced protocols such as IPSec / PPTP / L2TP / L2TP over IPSec with AES / DES / 3DES for encryption and MD5 / SHA-1 for authentication. The SPI firewall uses Object-Based design to make setting of firewall policies easy. The CSM feature allows more precise and efficient access control for URL / Web Content Filtering, IM and P2P applications. You can connect your regular analogue line (PSTN/POTS*) to the Line port of Vigor2820Vn. While you enable VoIP facility, you still can access fixed line (analogue line) to make calls just by dialing #0. The phone connected to the Line port and FXS port can be used for both POTS calls and VoIP because the incoming calls are automatically switched through to your telephone(s). As a result, both analogue telephones plugged into your router allow you to access VoIP and analogue lines. Furthermore, you can set rules through the "Digit-Map" function about particular call destinations using either your SIP/VoIP service or the POTS line. You can route local calls via your PSTN line (if you have a free calls package) whereas international calls can go via your preferred VoIP provider. The Vigor2820Vn model provides twin analogue phone and one line port. It supports multiple SIP Registrars with high flexible configuration and call handing options. The Vigor2820Vn model complies with IEEE802.11n standards. They support WEP / WPA / WPA2, encryption and MAC Address Control, Wireless LAN Isolation, Multi SSID and 802.1x authentication. The Wireless Rate Control function can adjust the data rate of each wireless station. WDS can help users to extend wireless coverage easily.