Yes, Konftel has a optional DECT base station that can be wall mounted. 

The Konftel DECT base station is connected directly to a analog telephone line/extension. 

With one base the DECT coverage is limited to up to 50 meters between the base and the Konftel. 

It can be registered to 4 different base systems or Konftel DECT base stations. 

In this way the coverage can be complete.

You also have the option to use the Konftel IP DECT 10 base, this is an IP based DECT base that use SIP.