Learning Hub / Tutorials / ATA Configs / Grandstream Device to 3CX V20 SystemFAQs

Tutorials: Grandstream Device to 3CX V20 System

This tutorial provides step-by-step instructions for configuring a Grandstream device within the 3CX V20 system.

Required access: 3CX Admin Access, Grandstream device web interface


Estimated time to complete tutorial: 10 min


Table of Contents


*Disclaimer: If your 3CX is hosted in the cloud you must have an SBC or Router phone to connect the ATA device.


Last Updated: 5/16/2025

Navigate to your 3CX.

3cx log in page

Log in to your 3CX.

3cx admin gear

Click on the "Admin" gear.

voice & chat option in the 3cx sidebar

Click "Voice & Chat."

add dect/fxs option in 3cx under voice & chat

Click "Add DECT / FXS."

dect/fxs model dropdown in 3cx

Click on "DECT/FXS Model" dropdown.

grandstreat device in the dropdown



Select your Grandstream Device.

MAC address field



Click the "MAC Address" field.

Enter the MAC Address on the back of the device.

next button

Click "Next."

sbc options in 3cx

Select the SBC you want to connect it to.

If you are hosting on premise you can select "Local LAN/VPN."

next button



Click "Next."

configure users in 3cx

Select the Configure Users Dropdown.
users option in 3cx

Select the user that will be using the device.

add fxs button

Click "Add FXS."

location to copy the provisioning url

Copy the provisioning URL.

close button

Click "Close."

information icon
Important Note:
If you do not know the IP address, you can do a network scan or plug in an analog phone. If you use an analog phone, dial ***, then wait for the IVR menu to play. When the IVR menu plays dial 02.

Log in to the Grandstream GUI

Put the private IP address of the Grandstream device into your web browser.

Now type the IP address into your web browser. Example: 192.168.1.100

grandtream password field

Click this password field.

Enter "admin"

Advanced setting in grandstream

Click "ADVANCED SETTINGS."

config server path field

Copy the provisioning URL without the https:// in the "Config Server Path:"

update button in grandstream

Click "Update."

apply button in grandstream

Click "Apply."

grandstream reboot button

Reboot your Grandstream Device.

relogin link in grandstream

Once your device comes back up you can click "Click to relogin."


Your password should now be changed to the one for the device in your 3CX.

web console password location in 3cx

Move back to your 3CX Tab.


Copy "Web Console Password."

password field in the grandstream interface

Navigate back to the Grandstream interface.


Click this password field. Paste the password.

grandstream login button

Click "Login."

grandtream port status field

Verify that the "Port Status" field "Registration" shows as Registered.

Learning Hub / Tutorials / ATA Configs / Grandstream Device to 3CX V20 SystemFAQs