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Configuring Grandstream GXW4104 with 3CX Phone System

  • Updated on December 16, 2021

This guide will help users to configure their Grandstream GXW4104 with 3CX Phone System.

Step 1: Prepare GXW4104

Follow below steps to set up a GXW4104:

  1. Connect the Grandstream GXW4104 gateway with the network using the WAN port of the gateway and connect GXW4104 to the power supply. The device will boot up.
  2. Ensure that the device is local to the 3CX server. The device should be in the same subnet and/or locally routed subnet.
  3. Find the IP and MAC Address of the device on your network:
    • Download the Grandstream IP Discovery Tool from here
    • Follow the “How to use the program” instruction in the Readme.txt file
    • Take note of the: MAC Address / IP Address

Step 2: Add GXW4104 to 3CX Server

To add Grandstream GXW4104 to 3CX Server, follow below steps:

  1. Navigate to “SIP Trunks” within the 3CX Management Console and click “Add gateway”.
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Figure 1: Add GXW4104
  1. Add PSTN Gateway.
  • Select Brand: Grandstream
  • Select model/device: Grandstream GXW4104
  • Number of Physical PSTN Ports on the device: 4
  • Main Trunk No: Define the number of the FXO lines which act as catching all destination.
  • Click “OK” to save the configuration.
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Figure 2: Add PSTN Gateway

Step 3: PSTN Line Setup

Follow below steps to configure GXW4104 on 3CX Management Console:

  1. In the General Tab:
    • Enter Registrar/Server/Gateway Hostname of IP: This is the IP address of your GXW4104 (acquired in Step1.3.c).
    • Copy the “Provisioning Link” which needed in later steps.
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Figure 3: General Tab
  1. In “PSTN Gateway Options” under ‘’Options” tab:
    • Fill in “Device MAC Address”
    • Select “Caller ID Scheme”
    • Configure the Tone sets
    • Fill in “Device MAC Address”
Table

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Figure 4: PSTN Gateway Option Tab
  1. Inbound Rules:
  • In “DIDs” tab, click “Add DID” to create DIDs. The DIDs are used to allow calls to be routed based on the port the call was received. For example, if your device has 4 ports and you want to make 4 parallel calls, please configure at least 4 DID numbers here. Take notes of these DID numbers, we will need them later.
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Figure 5: Configure DIDs
  1. Press the “Generate device config” button at the top of the page. It will open a new tab in your browser and redirect to the device web UI.
Figure 6: Generate Configuration Template

Step 4: Provisioning GXW4104

Please refer to steps below to provision GXW4104.

  1. Log into GXW4104. The default password is “admin”.
  2. Go to Maintenance -> Upgrade/Provisioning.
  3. In the “Config Server Path” part, enter the “Provisioning Link” got in Step3.1. Make sure “Upgrade Via” is set to HTTP.
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Figure 7: Provisioning GXW4104
  1. Click the “Save” button and reboot device.

Step 5: Configuring GXW4104 Unconditional Call Forward

Please refer to steps below for GXW4104 channels settings:

  1. Log into GXW4104 using the IP address in a browser. Go to Settings -> Channels Settings -> Calling to VoIP -> Unconditional Call Forward to Following.
Timeline

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Figure 8: Unconditional Call Forward
  1. Configure “User ID” with your DID number for each channel. (As we set on Step3.3). Click the “Save” button and reboot the device after configuration.

Take 2 parallel calls for example:

We want 2 parallel calls and plug one PSTN line to port 1 and plug another PSTN line to port 3. And we want to route port 1 calls according to DID number 1002, route port 3 calls according to DID number 1004, then we need to configure the “User ID” section as below:

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Figure 9: Unconditional Call Forward Example

Step 6: GXW4104 FXO Lines Setting

Please refer to steps below to configure GXW4104 stage method:

  1. Log into GXW4104 using the IP address in a browser. Go to FXO Lines -> Dialing -> Dialing to PSTN. Configure this page as follows:
    • Set the “Stage Method” field to “ch1-4:1;”
    • Click the “Save” button and reboot the device.
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Figure 10: FXO Lines

Step 7: 3CX Server Inbound Rules Configuration

Please refer to steps below to configure inbound rules on 3CX Management Console:

  1. Go to “Inbound Rules” within 3CX Management Console, press “Add DID Rule” button
  2. Under “General” tab
    • Name: Enter the inbound rule name.
    • DID/DDI: From the drop-down list, choose the DID number you created in part III.3
  3. Under “Route calls to”, configure “Destination for calls”.
  4. Click “OK”.
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Figure 11: Inbound Rules

Note:

Additional information can be found here: https://www.3cx.com/voip-gateways/grandstream-fxo/

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