User Guide
Page 19
... manage PLA v2 and PLA v1 models with different PLA models that have a firmware version of at least 3.0.5 in ZyXEL's website (www.zyxel.com). PLA-401 Series User's Guide 19 Note: You cannot downgrade the PLA-401 Series' firmware to 3.0.5. At the time of firmware and utility versions compatible with firmware version 3.3.4. The firmware will be upgraded to firmware version 3.3.4. For PLA v2 models (for example, PLA-400, PLA-401, PLA-470, PLA...
... manage PLA v2 and PLA v1 models with different PLA models that have a firmware version of at least 3.0.5 in ZyXEL's website (www.zyxel.com). PLA-401 Series User's Guide 19 Note: You cannot downgrade the PLA-401 Series' firmware to 3.0.5. At the time of firmware and utility versions compatible with firmware version 3.3.4. The firmware will be upgraded to firmware version 3.3.4. For PLA v2 models (for example, PLA-400, PLA-401, PLA-470, PLA...