Compex Systems WPE53G - Manual (Page 179)

Page 173
Q3) Can I update my access point to this mSSID firmware?
Yes. You can retain your access point configuration when you update
to the mSSID firmware if the current firmware running is v1.3x and
above.
If AP is running the following configuration setup, updating to the mSSID
firmware will affect the configuration.
If AP is running as PtP (Point-To-Point) or PtMP (Point-To-MultiPoint)
mode.
The reason it cannot retain the configuration is because mSSID uses a
new PtP and PtMP connection setup method called: RootAP and
Transparent Client. This method is compliant with IEEE 802.11h standard.
AP is running very old firmware v1.2x and below.
Q4) Can I update to mSSID firmware but setup only one SSID
connection?
Yes, mSSID firmware operation is similar to previous single SSID firmware
when setup with one SSID.
If the existing AP is running v1.3x firmware, after updating to mSSID it will
retain and continue to run the previous configuration. No
reconfiguration is needed.
Q5) I have a MAC Filtering table set from a previous firmware. Will
updating to mSSID cause the MAC table to be lost?
No, if your firmware is v1.3x and higher, updating to mSSID firmware will
retain all entries in the MAC table.
However, if you switch back from mSSID to the previous sSSID firmware,
the MAC table will be lost.