The VIP-1000PT from Planet is a high-definition but cost-effective PoE IP Phone featuring VoIP and traditional telephone communications, the VIP-1000PT has a 1-line business IP feature. VoIP communications can be extended when using PPTP VPN or L2TP VPN. The VIP-1000PT also allows calls to be transferred to anyone at any location within the voice system, which enables the enterprise to communicate more effectively and is helpful to streamline business processes.
Compliant with the Session Initiation Protocol 2.0 (RFC 3261), the VIP-1000PT is able to function with other Planet and any third-party VoIP products.
Refer to above PDF Data sheet