What PTP switches can be used with the Qulsar Qg 2?

The Qulsar Qg 2 will work with any PTP switches. The accuracy will most likely be improved by using PTP aware switches as they will (theoretically) effectively remove the packet delay variation in the system. With PTP aware switches you can chose to run your network in End-to-End mode or Peer-to-Peer mode. Qulsar Qg 2 support both modes.