ZTE ZXDSL 831 - How to Backup and Restore modem configuration

Mediaket shows you how to Backup and Restore ZTE ZXDSL 831 modem configuration  in less than 3 minutes.
Why you need to backup your modem router configuration? ...

"The Backup Settings option allows you to save a file containing all your modem router's configuration settings, like wireless settings, port forwarding, WAN setup, DNS, All passwords, wireless shared key etc. to a file on your computer. This file can then be used to restore your settings if the router is reset to the Factory Default settings."

ZTE ZXDSL 831 overview:

The ZXDSL 831/831B/831II/831BII is an ADSL access device that allows multiple line transmission modes. The equipment provides a 10/100Base-T Ethernet interface in a local LAN device.
Through the high-speed ADSL access service, the ZXDSL 831/831B/831II/831BII can provide the broadband Internet service or enterprise network access service for users.

Features:
The ZXDSL 831/831II, as an routing-capable ADSL MODEM, is of the following characteristics:

Providing ADSL high-speed Internet access via a common telephone cable.
Supporting multiple line modes (self-adaptive lines).
Providing a 10/100Base-T Ethernet interfacelMore highly reliable, simpler operation and less power consumption.
Supporting the Bridge or Router mode.
Supporting the built-in PPPoE dialup function.
Supporting the Network Address Translation (NAT) function.
Supporting the DHCP server function.
Supporting the UPnP function.
Supporting the fast configuration function.
Backup the configuration files to a local computer or upload the saved configuration files to the ZXDSL 831/831II.