Microphone level is 96 with 10dB boost... see attached for enhancement settings

It did work for me by waiting almost 3 minutes for my laptop to find Proximity... Used it in a couple of different rooms with success

Same here... tried for 30+ minutes making changes as suggested in various combinations, and still my laptop (Lenovo X230) cannot be detected.  Perhaps ultrasound is not such a good idea especially now Cisco is allowing pet dogs to join us in the offi...