We have approximately 200 wired Sennheiser headsets currently in use. Many of these use a USB adapter. Will we be able to use these with our new VVX 450 hard phones if we order the Sennheiser USB adapters for them?
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The VVX phones use RJ9, I think. If you have a USB to RJ9 adapter I think that should work. I would try it before purchasing 200, of course 
I know that the Sennheiser adapter for USB connections has its drive in a chip on the cord itself. this should work. Has anyone tried it?
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