vii
5.9.2 Local Upgrade ............................................................................................................ 135
5.10 Switching System Language ............................................................................................... 135
5.11 Configuring LED Status Control .......................................................................................... 136
6 Network Diagnosis Tools ............................................................................................................... 137
6.1 Network Check ....................................................................................................................... 137
6.2 Network Tools ........................................................................................................................ 138
6.3 Alarms .................................................................................................................................... 139
6.4 Fault Collection ...................................................................................................................... 140
7 FAQs .............................................................................................................................................. 141
7.1 Login Failure .......................................................................................................................... 141
7.2 Factory Setting Restoration ................................................................................................... 141
7.3 Password Loss ....................................................................................................................... 141