Miracast uses a direct connection and does not use your wireless infrastructure, so it will work fine for guests.
AirPlay is a bit more tricky, and you will need to work with your wifi implementation in order to allow guests to "see" it. (just like a regular Apple TV).
Jan 03, 2013 Question: How can I request a change to the current Polycom SIP / UC Software?
Resolution: Please check => here <=
This needs to be a feature request.
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