Have the phone angeschaft to install as a test device to get it to a Siemens OpenScape Voice telephony server. Worked and was pretty straightforward. Visually it but long not keeping pace with the Siemens OpenStage 40 and 60 and also the functionality is somewhat limited. The price is not to be classed as a bargain. One can snom370 so buy but it does not have alternatives would also open stage 60And Open Stage 80 also both SIP phones.