How to factory reset ZyXEL WAC6552D-S router – Default Login & Password

The ZyXEL WAC6552D-S router has Gigabit WiFi, ETH-ports and 0 USB-ports.
It is also known as the ZyXEL 802.11 ac Unified Pro Outdoor Access Point with Sector Smart Antenna.
How to factory reset ZyXEL WAC6552D-S - Default Login & Password

ZyXEL WAC6552D-S default Password , Login & Gateway settings :

If you have performed a reset of your WAC6552D-S device or not changed the defaults, you
be able to access it with the following settings
Default subnet mask:

How to factory reset (hard reset) ZyXEL WAC6552D-S :

You can factory reset your ZyXEL WAC6552D-S in the following way(s)
Through the web interface
Open web browser and go to the address of your router (check defaults below)
Log in with your username/password (default are below)
Under Maintenance, locate Backup/Restore and click it
Locate the section Factory defaults and click the reset button, if prompted click Ok
Wait for the router to reboot
With the reset button
Have the router plugged in and turned on
Locate the reset button which is marked reset and usually in a hole
With a paperclip or sharp pen, press and hold the reset button for 10 seconds until the SYS light starts to blink
If the SYS light doesn’t start to blink after 10 seconds
Keep holding the reset button pressed
Turn off the modem / unplug it
While still holding the reset button, start / plug in the router
After about 20 seconds, the Power or SYS light will start blinking rapidly
Release the reset button
When the light stops blinking and light up normally the router is reset.

ZyXEL WAC6552D-S router specifications :

System specs
CPU: n/a
RAM: n/a
Flash: n/a
Custom firmwares: None
WiFi: Gigabit (abgn+ac)
WiFi bands
2.4GHz & 5GHz
WiFi throughput: n/a
USB-ports: 0