Hi Exponent -- I am experiencing the same behavior on my TWO VSX 9000 VC devices.
Were you ever able to find a solution to this beeping?
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I have moved you reply from => here <= as that section discusses analog Polycom phones.
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To clarify, here is my problem:
I have two VSX9000 VC units.
Starting last week; BOTH begun 'beeping' about every 20-30 minutes; even when NOT on a call.
The only way to avoid this is to power the units off.
It seems that sometimes, we can go a few hours with no 'beeping', but then it will start up again every 20-30 minutes.
I have checked the status of the batteries in the remotes, etc; but nothing seems 'off' on the diagnostics screen.