What is the Grandstream IP/PBX and how does it work?

The Grandstream IP/PBX uses analog phone lines to place and receive phone calls. Since the device supports SIP (Session Initiation Protocol), it can be used by WIN-911 as an alternative to TAPI modems anywhere analog phone lines are available to make phone calls. 

WIN-911 interfaces with the Grandstream using a VoIP connection, the Grandstream then routes the call to the attached analog line. The Grandstream device must be on the same subnet as WIN-911 and does not require an internet connection.  

Grandstream Setup Guide 

This setup guide is for users who did not purchase the Grandstream from WIN-911.

If you did purchase the Grandstream from WIN-911, the setup process is simpler and can be found in a different KB article.

You need to access the Grandstream Web GUI to upload the config file attached to this article, and then follow this guide to complete the following steps:

1.    Reset your Grandstream default password

2.    Set your static IP address

3.    Set Date/Time settings

4.    Configure WIN-911 settings

Connecting the Grandstream

Figure 1: UCM6202

Figure 2: UCM6301

  1. Connect one end of an Ethernet cable into the WAN port of the Grandstream, and the other end into your switch or directly into the WIN-911 machine.
  2. Connect the 12V DC power adapter into the 12V DC power jack on the back of the device. Insert the main plug of the power adapter into an appropriate surge-protected AC power outlet. 
  3. Wait for the Grandstream to boot up. The front LCD display will show the device hardware information when the boot process is completed. 
  4. Once the Grandstream is successfully connected to your network via the WAN port, the Network LED indicator on the front of the device will be lit green, and an IP address will be shown on the LCD display. Take note of the IP address, you will need it to access the Web GUI.
  5. Connect your phone line from the wall jack to the FXO1 port. Do NOT use the FXS ports.

UCM6300_usermanual.pdf (

Accessing Web GUI

The Grandstream is configured via a Web GUI interface after the device has booted, you should have an IP address that can be used to access it.

1. Open a web browser and enter the IP address into the address bar in the following format: https://ipaddress:8089 (The IP address is displayed on the LCD screen of the Grandstream)

Note: Your WIN-911 Machine will need to be on the same network as the Grandstream Modem.

2. Depending on your browser, you may receive a warning about the security certificate. You can ignore this warning and continue to the website. Here is an example of the warning in IE.


3. After the portal loads, enter the default credentials. 

Username: admin
(see label on the bottom of the device for the default password)

4. You should now be logged into the Web GUI and can begin configuring the device.

Grandstream Configuration

Upload the configuration file that is attached to this article

  • After logging in to the Web GUI, expand Maintenance on the left and select Backup
  • Click Upload Backup File
  • Browse to the location where you have saved the config file and select it for use
  • Click the Restore button to load the config file onto the device
  • You will be prompted to reboot the device, click OK and wait for the reboot to complete.

When the Grandstream comes back online, the config file has overwritten some settings that you now need to configure, including the IP address and the default login password.

The IP address settings are now set to the following:

WAN Port:

LAN Port: (with DHCP server enabled)

You will need to know some basic networking to get back into the Grandstream Web GUI, as these IP addresses may not match your network IP scheme. 

The easiest way to proceed is to check if you still have access via an IP address being displayed on the LCD of the Grandstream, or if you can access  

If not, then plug the Grandstream directly into the computers network port via an Ethernet cable, using the LAN port on the Grandstream. 

Since DHCP server is enabled in the Grandstream LAN port, this will assign an IP address to that machines' network card, and you will be able to access in a web browser.  If you cannot access the web GUI, then you need to go to your network adapter settings on the machine and set the IP address to an IP on that network (i.e.  Your IT department can assist with this, or search online for how to change your IP address on you network adapter - Microsoft TCP/IP Instructions 

 Once you get access to the Grandstream web GUI, the new default login credentials are:

Username: admin
Password: txsNS6kH

Change the default login password

  • Expand Maintenance and select User Management
  • Click the edit button on the admin account line

  • Click Change Password

  • In the old password field, enter txsNS6kH
  • In both new password fields, enter the default password on the sticker on the bottom of your device

  • Click the Save button on the top right and then click Apply Settings
  • Your Grandstream will now require you to log back in, using the new password you just set

Configure Static IP Address

We strongly suggest setting a static IP address for the device. Please be aware that it is possible for an IP address to change when using DHCP. You may need to work with your IT team to arrange a static IP address that can be assigned to the device.

  • After logging in to the Web GUI, expand System Settings on the left and select Network Settings
  • Change "Method" drop down from Route -> to Switch
  • Under LAN Make sure the IP Method is set to Static
  • Using the information provided by your IT team, fill in the fields for IP Address, Subnet Mask, Gateway IP, and DNS Server 1
  • Click the Save button on the top right and then click Apply Settings.
  • You will be prompted to reboot the device, click OK and wait for the reboot to complete. 

Set Date/Time 

  • Expand System Settings and select Time Settings
  • Click Set Date and Time tab
  • Click on the little calendar icon to set the date and time
  • Click Save and Apply Settings

You will be brought back to the login screen, you can now plug in the Grandstream wherever you choose on the network and connect your analog phone line.

WIN-911 Configuration

Open WIN-911 Workspace from the Start menu and navigate to Gateways (arrow square) then click the PLUS icon to create a new Gateway and select Voice.

Note: You will always be in edit mode, but MUST click Save Changes if wanting to make any changes.

The Voice Gateway consist of two sections, Server and Audio.  Use the instructions below to fill in the information.

Server Settings

The Voice Hardware Grandstream will be selected by default with several settings pre-set for you.

Server Settings:

  • Name: Default Voice Gateway  (pre-set, changeable)
  • User ID: 1000  (pre-set)
  • Password: 123abc  (pre-set)
  • Server Address: Enter the IP address of the Grandstream device
  • Network Adapter: Using the dropdown, select the IP Address WIN-911 will use to communicate with the Grandstream (IP Address can be manually entered)

Important! - The Grandstream and WIN-911 machine MUST be on the same network.  Advanced                         network configurations are possible with your Network Administrator's assistance.

Audio Settings

  These settings will be pre-set and most can be adjusted as needed.

  • Voice Selection: Microsoft David Desktop  (pre-set).  Use the drop down to select the text-to-speech engine WIN-911 will use to generate audio during phone calls.  Text-to-speech engines vary depending on the Windows operating system.
  • Speaking Rate Offset:  Allows you to control the speed of the text-to-speech engine.
  • Volume: Set the volume level of the text-to-speech engine playback. 
  • Greeting Message: Custom greeting that will play at the beginning of all phone calls (pre-set, changeable)
  • Codec: Auto Select (pre-set, do not change)
  • Preview: Click the Play icon to hear the Greeting Message in the selected voice. 

Click the Save Changes once all required fields have been filled. 

Test SIP Settings

Now that the Grandstream and WIN-911 are set up, return to the WIN-911 Voice Gateway created to place a test phone call.  

  • Click on the Test Settings button at the bottom of the Gateway screen. 
  • Enter a phone number to dial. (Be familiar with your phone line from your provider, does it require a prefix to dial out? Do you have long distance enabled? etc...)

  • Click the Check Mark button and WIN-911 will attempt to place a call.  If the Grandstream accepts the call, a confirmation dialog will appear.

  • Congratulations, you have successfully configured WIN-911 to use the Grandstream IP/PBX.

Technical Support

To create a support case, you will need either your Customer Care Code or your Serial number. You can create a Case online or contact the product support line: (512) 326-1011.