Hello, you first need a Yealink W56P with the article number 20713904. Then you should check with your supplier whether they support one of the following protocols: SIP, SIP v2, RTCP-XR, VQ-RTCPXR. You cannot use the Yealink W56H handset without a base station.

Hello,
This range of devices requires a Dect base which manages the devices.
Then you need a subscription with a Web operator that allows SIP-type connections.
Personally, I use and offer Peoplefone because the subscriptions make it easy and cheap to connect this type of device.

To avoid the Dect base, it is possible to use a Wifi tel which allows you to connect directly to the tel network using Wifi coverage. Granstream offers this solution: Grandstream Grandstream WP810