The headset cannot be plugged directly into the PC as it is designed for connection to a telephone system. A special USB adapter (e.g. the Poly Discover D315) is required for use on a PC, which makes the headset compatible for softphone or computer applications. A direct connection to the PC is not possible without a telephone system or this adapter.
Hello TomBach
The connections definitely don't look like a PC connection to me, but I would recommend that you contact the hotline of the Poly Customer Care Team via email headset.hotline@plantronics.com or phone: +41(0)800 932 340. Mr. Patryk Lubasinski from the hotline was able to help me with my questions very competently.
Unfortunately, we cannot give an answer to this question even after consultation with the supplier. We would therefore recommend that you contact the manufacturer directly.
According to https://compatibility.plantronics.com/deskphone you need a Poly APS-11 EHS adapter cable. We ourselves have switched to headsets from Jabra, for example the Jabra Engage 65 Stereo...
The headsets can be synchronised with any base station. Plug the headset onto the base station and wait approx. 30 seconds, after which the two know each other. This means that each person can work with their personal headset at any base station. However, there is the question of charging the headset batteries. If the headsets are not connected to the base station for a longer period of time, the battery is empty and the headset is not ready for use.