Welltech VoIP ATA series V.2.1 - Manual (Page 139)

ATA-171/172/171P/171M/171+/172+
User’s Guide
(Figure 1)
Step2: Enter the following page, select update [gz] file, (e.g. VP511_70105.gz),
click [Open].
(Figure 2)
Step3: Back to page [Update Firmware], made sure the update file is on [File
Location], please click [Update] (See Figure 3)
(Figure 3)
Step4: Note page will be seen, please click [Submit] (See Figure 4)
(Figure 4)
Step5: [Note Information] page will be seen. After updating, please reboot the