AQ-200 series devices don’t implement any support for the RSTP-protocol. They should be always treated as non-RSTP devices.
That being said, under certain circumstances, it is possible to mix RSTP and non-RSTP devices. For example, the so-called “RSTP ring” (a configuration where two RSTP-switches and several non-RSTP devices are connected into a single loop) should be able to operate although in my understanding this isn’t the application intended by the standard. Also, one needs to be extremely careful when mixing RSTP and non-RSTP devices as it is very easy to cause unintended and unresolved loops or unintentionally inactive links when the complexity of the network increases.
It should also be
noted that RSTP really isn’t even intended to be used as a high-availability
redundancy network protocol. RSTP should be used only to safeguard the network
against unintended loops. For proper redundancy, for example HSR or PRP should
be used instead.