First Virtual Communications 065-7710 - Manual (Page 101)

Signamax
™
065-7710 8-Port 10/100BaseT/TX + 2SFP Managed Switch
Publication date: January, 2006
Revision A1
93
M Check:
Migration Check. It forces the port sending out an RSTP BPDU instead
of a legacy STP BPDU at the next transmission. The only benefit of this
operation is to make the port quickly get back to act as an RSTP port.
Click <M Check> button to send a RSTP BPDU from the port you
specified.
Fig. 3-36