D-Link DPH-540 802.11g/b Wi-Fi VoIP Phone (Black) Call Virtually Anywhere in the World Through a Wireless Network with High-Speed Internet Connection Get Secure Access to an 802.11g or 802.11b Wireless Network with WEP, WPA, or WPA2 Encryption Large, Bright Color LCD Screen Displays Easy-to-Read Text and Call Information Supports any SIP-based VoIP Provider such as TelTel, BroadVoice, SIPPhone, and Vonage