HT-502 FXS Gateway


This document describes the steps necessary to get a Grandstream HT502 2 port FXS Gateway working with a UCx Server.


  • Operational UCx Server
  • Extensions on the UCx server programmed as SIP devices
  • Grandstream HT502 FXS Gateway
  • Power Cube for HT502
  • Network Cable
  • Analog Telephone
  • Ethernet Network with DHCP Server

Step One: Configure SIP Phone on UCx Server

  1. Open the UCx Web-based Configuration Utility
  2. From the PBX tab, select PBX Configuration
  3. From the left side column, select Extensions
  4. In the drop-down list box, select the device type Generic SIP Device and press the Submit button
  5. Enter the extension number of the SIP extension in the User Extension field
  6. You must enter something in the Display Name field.
  7. In the Device Options section, you will need to enter a password in the Secret field.
  8. These are the only three required settings to make a SIP device functional.  All other settings are optional.
  9. Press the Submit button at the bottom of the page and then the Apply Config bar.

Step Two: Install the Hardware

  1. Plug one end of the Network Cable into the WAN Port on the back of the HT502 device,
  2. Connect the other end of the network cable to your network.
  3. Plug the Analog Telephone into the RJ-11 Port 1 on the back of the HT502 device.
  4. Connect the Power cube to the HT502 device.
  5. Plug the power cord into an AC wall outlet and allow the system to power up.

Step Three: Determine the IP Address of the HT502 device

  1. Pick up the handset of the Analog Telephone, wait for dial tone and dial ***.
  2. Dial 02 to have the device speak the IP address to you and write it down.
  3. Press the pound key # and then dial 12. Dial 9 to ENABLE WAN access to the GUI.  
  4. Press the pound key # and hang up.

Step Four: Provision the Grandstream HT502

  1. Open a Web Browser window and connect to the IP Address of the HT502 device.
  2. Login to the device using the default password of admin and the first screen you see is the Status page and the ports are Not Registered.

  3. Navigate to the FXS Port1 tab and set the Primary SIP Server and Outbound Proxy Server to the IP address of the UCx server.  Set the SIP User ID to the Extension number, set the Authenticate ID to the Extension number, Set the Password to be the same as the secret of the SIP extension as programmed in the UCx server and set the Name to anything you want.  Press the Apply button at the bottom of the page, then press the Update button at the bottom of the page.
  4. Repeat the above configuration in the FXS Port2 tab if you require a second port to be activated and usable.

  5. Login to the device and check the status screen - you should see your ports Registered.

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