How to Configure a Grandstream GXW Series FXS Gateway with 3CX
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Configuring Grandstream GXW Series FXS VoIP Gateways

Configuring Grandstream GXW Series FXS VoIP Gateway

Supported Models Grandstream GXW4216, GXW4224, GXW4232, GXW4248

FXS gateways connect internal analog devices such as fax machines or analog phones and register them as extensions / fax extensions to your PBX. Those extensions can be addressed as normal phones, however, their functionality is limited due to the capabilities of the analog technology.

Notes:

  • The device must be local to 3CX, in the same subnet and/or locally routed subnet (including site to site VPN)
  • Ensure that you have created the extensions, (or fax extensions), before adding the FXS gateway to the PBX.

Configure Grandstream GXW Series FXS VoIP Gateway with 3CX

Supported Models Grandstream GXW4216, GXW4224, GXW4232, GXW4248

Step 1: Create Fax extension (Optional)

Step 2: Add and Choose Device

Step 3: Configure the Gateway

Step 4: FXS Line Setup

Step 5: Prepare Grandstream FXS Gateway

Step 6: Update the Firmware (If firmware is not the latest)

Step 7: Upload the configuration to the gateway

Step 1: Create Fax extension (Optional)

If the FXS Gateway will be used to connect fax machines to the PBX, the Fax Extensions option must be used instead of a regular extension.

  1. Go to the 3CX Management Console.
  2. Navigate to “FAX Extensions → +Add”.
  1. Define the “FAX Extension Number”, the “FAX Extension Authentication ID” and the “FAX Extension Authentication Password”.

Step 2: Add and Choose Device

  1. Navigate to “FXS/DECT” within the 3CX Management Console and select “Add FXS/DECT”:

  1. Select Brand: Grandstream
  2. Select Model/Device: GrandStream GXW4224
  3. MAC Address: Enter the “WAN MAC Address” of the Grandstream gateways (Without colons or dashes)
  4. Press “OK” to create the device.

Step 3: Configure the Gateway

  1. Verify the settings in the General tab of the Gateway settings page.
  2. If using the GXW4224 Gateway for faxing, choose the fax sending transmission Mode.
  • FAX in T.38
  • Fax in Audio G711(Pass Through)

Step 4: FXS Line Setup

  1. Go to the Extensions tab.
  2. Select the extensions you wish to have configured on this device.
  3. Click OK to complete the configuration of the Gateway device.

Step 5: Prepare Grandstream FXS Gateway

Make sure that your Grandstream device is factory reset. If not, reset the Grandstream FXS Gateway by pressing and holding the “Reset” button for about 5 seconds.

The Grandstream FXS gateway is configured, by default, to have an IP Address assigned via DHCP. To find out the IP Address defined by the Gateway:

  1. In the screen on the front of the device, you should be able to see the IP Address of the device. If you do not see the IP Address, press the DOWN button to show the IP Address while in the Home screen.
  2. Connect via your browser to the IP Address mentioned in the steps above
  3. Log in to the Gateway, by entering the IP Address shown in the screen of the device, in the browser.

  1. The default password is: admin (This will be changed when the device is provisioned)

Step 6: Update the Firmware (If firmware is not the latest)

  1. Download the latest firmware from here

  1. Go to the Maintenance menu
  2. Select Upgrade and Provisioning
  3. In the “Upload Device Firmware” section click Upload
  4. Click Choose File
  5. Navigate to the firmware file
  6. Select the relevant firmware file
  7. Click Open

  1. Click Upload to apply the firmware to the gateway

After a few minutes, you will be able to log in to the device and start using it again.

Step 7: Upload the configuration to the gateway

  1. Go to the FXS/DECT page in the Management Console.
  2. Select your gateway device.
  3. Click Edit

  1. Right click the Provisioning Link and select Save Target as, and save it to your disk. This XML file will be the configuration file of your gateway.
  2. Log on to the gateway via web browser, using the default username and password, as mentioned above.

  1. Go to the Maintenance tab
  2. Select Upgrade and Provisioning
  3. In the Upload Device Configuration section, click the Upload button.
  4. Navigate to the XML file you downloaded from the 3CX Management Console
  5. Click Open
  6. Click Upload Configuration

During this time the gateway will apply the configuration and reboot. When the gateway is ready, you will see the IP Address come up on the screen of the device. You will be able to see the normal extensions status in the Extensions page of the PBX. If you are using FAX Extensions, you will see the status of these in the System Extensions page.

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