GSM Gateway


Prepare the following required components:

  • GSM Gateway
  • Activated SIM Card
  • PC with networking
  • UCx Server

Configuring the GSM Gateway

  1. Connect a network cable between your PC and the FE01 connector on the back of the Gateway
  2. Set the IP address of the network adapter on your PC to be
  3. Set the subnet mask of the network adapter on your PC to be
  4. Power up the GSM gateway 
  5. Connect to the GSM gateway by opening a browser and entering the address
  6. The default username and password is admin

  7. After logging in, navigate to the Network Configuration - Local Network page
  8. Configure the IP Address, Subnet Mask, Default Gateway and DNS Server(s) for the Gateway that matches your network
  9. Press the Save button and power down the Gateway
  10. Insert all the SIM cards that you are using while the power is off
  11. Disconnect the network cable between the PC and the GSM Gateway
  12. Connect the network cable from the port labeled FE01 on the GSM Gateway to your network
  13. Connect the PC directly to the network
  14. Power up the GSM Gateway
  15. Open a browser on the PC and enter the IP address that you configured in step 8 above
  16. Login with the default user name and password admin

  17. Navigate to the Operation - IP->Tel Operation page.

  18. Click the Add button

  19. Configure the following parameters:
    • Set Source Prefix to Any
    • Set Source IP to SIP Server
    • Set Destination Prefix to Any
    • Select Allow Call checkbox
    • Enter a name in the Description (e.g. To PSTN)
    • Press the OK button


  20. Navigate to the Operation - Tel->IP Operation page.

  21. Click the Add button

  22. Configure the following parameters:
    • Set Source Prefix to Any
    • Set Source Port to Port Group 0 <all>
    • Set Destination Prefix to Any
    • Select Allow Call and Auto Call check boxes
    • Enter a name in the Description (e.g. To UCx) 
    • Press the OK button.


  23. Navigate to the System Configuration - Service Parameter page

  24. Configure the following parameters:
    • Set 1st Preferred Codec to PCMU
    • Set Play Voice Prompt for GSM Incoming Calls to No
    • Set DTMF Method to RFC2833
    • Set Only Accept Calls from SIP Server to Yes
    • Set Allow Call from GSM to IP without Registration to Yes
    • Set Allow Call from IP to GSM without Registration to Yes
    • Press the Save button.


  25. Navigate to the System Configuration - SIP Parameters page.

  26. Configure the following parameters:
    • Set SIP Server Address to the IP Address of the UCx Server
    • Set From Mode when Caller ID Is Available to Tel/Tel
    • Set From Mode when Caller ID Is Unavailable to Username
    • Set Answer Mode to Alerted
    • Set 183 Mode to Immediate
    • Press the Save button.


  27. Navigate to the System Configuration - Port Parameter page

  28. Click the Detail button of the port you wish to configure:
    • Set To VOIP Hotline to the DID of the Inbound Route to terminate the calls on this port too
    • Set Auto-Dial Delay Time to 6 seconds to allow CLID to be passed between the first and second ring
    • Press the Save button

    Repeat this step for each port.


  29. Power cycle the Gateway.

Configuring the 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 Trunks
  4. On the Add a Trunk page, from the list of different trunk types, select the Add SIP Trunk link
  5. Under General Settings, enter a descriptive name in the Trunk Name field
  6. Under Outgoing Settings, fill in the Trunk Name field (it can be the same or different from the Trunk Name under General Settings)
  7. In the Peer Details box, enter the following lines:


  8. Ensure all the fields under Incoming Settings are blank
  9. Ensure the Registration String field is blank
  10. Press the Submit button
  11. Create an Inbound Route that has the same DID as the Hotline Number configured in Step 28 of the GSM Gateway setup above.