The Siemens optiPoint 420 S familyAll models belonging to the optiPoint 420 S families are based on the SIP protocol (Session Initiation Protocol) for effective communication with all components in the network. This enables the terminal devices to support a multitude of SIP-based communication systems. In addition they are optimized for use of the features of the Siemens HiPath 8000 communication system. Power can be supplied either locally or via Power over Ethernet (PoE) in accordance with the IEEE 802.3af standard.Equipped with a two-line display and three dialog keys, the optiPoint 420 economy S model enable you to control the provided features such as call forwarding, hold, consultation hold or call waiting. The telephone number and name of the caller can also be displayed, of course, making this model eminently suitable for business communication in offices, sales outlets or hotels.