The „Ergophone S 500“ offers intelligent technology that convinces in its simplicity. Besides the excellent voice and audio quality and the consistently ergonomics, the phone provides a number of security features that ensure reliable and flexible communications in emergencies. The phone is designed for connection to analogue ports of PBXs. It do not need batteries or apower adapter1. Ergonomics Compact, thin and modern in design, uncompromising ergonomic to use: The phone combines intelligent technology with simple operation. The design of the phone takes into account the physical, sensitive and intellectual abilities of people over the average value addition. Emergency communications Just a quick and flexible emergency communications ensures a needs-based assistance. Quick configuration The configuration of the phone can be done via phone menu or web browser. Using SD card, the settings can be transferred to other phones. Connection conditions The phone is suitable for connection to the public telephone network (only with AC adapter) and for connection to analogue ports of telephone systems. It can be operated without AC adapter, if the PBX provide 5 mA in sleep mode without recognize the state „off hook“. If the recognition of the busy state of the system is set sensitive, the operation is only possible with the original AC adapter (accessories). At the port the phone „Ergophone S 500“ is connected without AC adapter, no other phone can be operated (e.g. via simple parallel connection). Only in the special version "Ergophone S 500 with emergency priority", this restriction does not apply.