Questions about Gigaset Pro N670 IP PRO DECT IP

Analogue telephony is not possible with this device. It is a DECT base station that is designed exclusively for connection to a VoIP telephone system (VoIP PBX) and supports IP telephony. The device connects DECT handsets directly to an IP-based telephone system via Ethernet, not via analogue connections.

The power supply unit is not included with this item, you can find the right cable under the following link: Gigaset power supply unit for base station

You need to my Poe injector or connect to switch that powers other devices with power over ethernet (Poe)

No, not per default. Your DECT handset must send out unique identification number to be registered. It is not that simple as with normal base stations.

Yes, it has ECO DECT. You can select full or limited DECT under the ECO menu.