Plantronics + Polycom.
Now together as
Will P/N: 2200-23809-001 work with a VSX 7000 system?
No it will not. The VSX used a different type of technology that was refered to as the CLink to connect perpherials to the codec.
The HDX and the RP Group Series use the second generation of the technology, the Clink 2. The ceiling microphones use the CLink 2 technology to connect the microphone array to the codec.