I'm hoping someone here can help as I am getting none from Sennheiser.
Got Sennheiser VMX so able to use for phone and computer/Dragon but neither can detect the VMX.
Cant even get the VMX Office to appear to work - I got a message of "PC Switch" from Sennheiser but their very poor manual mentions nothing about "PC switch".

Even without the base, the phone minimally should be able to detect the headset (Treo, by the way).

Any ideas?