In this article, we will outline the appropriate console cable to use for connecting to an access point and provide step-by-step instructions for establishing a connection using PuTTY or Tera Term.
Suitable cable
The USB TTL cable is the cable with four pins including one pin with a triangle icon, please connect the USB TTL cable to AP by console cable’s pin with a triangle in the place of the AP console pin with a triangle icon (pin 1).

The USB TTL cable is as below image, please follow Zyxel’s console header pin definition:
- Pin1 NA (leave empty )
- Pin3 Green (TX)
- Pin2 White (RX)
- Pin4 Black (GND)
- Remember that don’t connect red color pin to Zyxel’s console pin.
Connection process
- Connect the cable to your access point as described in the previous step.
- Run the application (in our example, we use Tera Term)
- Set "Serial" and choose the Port to which the cable is connected, as in the picture below.
- In the Tera Term window that opens, click “Setup”
- Select - Serial Port
- In the “Speed” field, set 115200
- Click "New settings."
- In the newly opened console window, you may need to press “Enter” to refresh the connection and see that the connection to the access point was successful.
- Now, enter the username and password for your access point.
Instructions for CLI commands can be found on the download page for each device in our download database.