This Draytek 2710VN router will support an ADSL, ADSL Max, ADSL 2, ADSL 2+ and Annex M connection. The VN model has twin VoIP POTS pass through. A USB Nas device can also be attached to this router to provide shared storage on the local network. SIP-compliant and can support up to six simultaneous different SIP providers as well as analogue phone line integration, switching & failover.