Option A (Thread to remote OTBR):
Available on ALL SLZB coordinators. This is the traditional setup and
can run over either USB or network (Serial-over-IP).
Option B (Thread + OTBR on device):
Available on SLZB-06xU, SLZB-MRxU and SLZB-Ultima. OTBR requires IPv6 on your LAN.
IPv6 will be force-enabled on the device when this mode is activated.