Grandstream UCM61XX Configuration Guide
Posted by , Last modified by Albert Diaz on 27 August 2018 02:13 PM

To log into the PBX, use the IP address found on the LED screen of the UCM. Use a web browser and go to that address. Since the web GUI is using https, it will warn you that the "site's security certificate is not trusted" or you will see an SSL error depending on which browser is used. Proceed to view the login page for the UCM.

Default Username: admin

Default Password: admin

Throughout this knowledge base, you will be saving and making updates to the UCM. When a change has been saved, it will show an "Apply Changes" button at the top right. Please click on the button to apply the changes or modifications that have been saved. 


First thing that should be done is update the firmware on the UCM61XX. There are two ways to do this. First please open the following link in another tab or browser;

  • Download the file
    1. Under IP PBX Appliance, find UCM61xx
    2. Click on to download the file (This was the latest firmware when this KB was written.)

  • Enter the link
    1. Under IP PBX Appliance, find UCM61xx
    2. Use the HTTP Upgrade Server address - to have the UCM download and install the latest firmware.
    3. Log into the UCM and go to Maintenance, then Upgrade, and enter in the server address.
    4. Press Save. Give the UCM a few minutes to download and apply the new firmware.

VoIP Trunk

Setting up a VoIP Trunk. Go to PBX, Basic Call Routes, then VoIP Trunk, and click Create New SIP Trunk.

  • Change the type to Register SIP Trunk.
  • Name the SIP Trunk.
  • Add the host name (
  • Enter the User Name (the account or DID being registered)
  • Enter the Password of the account.
  • The AuthID is the same as the User Name
  • Click Save

SIP Extensions

Extension Preferences

The system comes preconfigured with ranges for extensions. To edit these ranges or disable the extension range go to PBX, then Internal Options, and select General. Here you will find Extension Preferences. For this example I have changed the User Extensions range to 200-299 and left the rest of the ranges with default settings.

Creating extensions can be done one at a time, or in bulk by exporting a CSV file (For SIP Extensions. Use row 2 as an example, but delete this row before importing into the UCM. Save as MS-DOS when editing in Excel.), then import the CSV file with the updated information for the extensions. For this example we are going to create an extension through the web interface. Go to PBX in the menu, then Basic/Call Routes and select Extensions and click Create New User.

At any time, hover over the "i" icon to see information on a specific settings. 

  • Enter the extension number desired or use the extension number selected by the system.
  • If the extension has its own DID, enter the DID to show on outbound calls. (this could be limited by the SIP Trunk).
  • Choose a permission state for this extension.
  • Enter the user's first name.
  • Enter the user's last name.
  • Enter the user's e-mail address.
  • For selected Codecs, remove all but G729 and PCMU. Move G729 to the top.

These are basic options, if other options are needed, please review the information provided on the information icon and use as needed. Note the SIP Password is needed for phone registration. Also note the voicemail password can be changed here as well.

If Ring Groups (Hunt Groups) and IVRs (Auto Attendants) are needed, please go to PBX, then Call Features. Here a Ring Group can be created by assigning a name and added extensions that have already been created. For an IVR, please click on Create New IVR. Name the IVR (main-open) and select events for the available options. Note that a prompt link has been provided to record prompts for IVRs. Each IVR has three prompts which can be used. The Welcome Prompt, the Response Timeout Prompt, and the Invalid Prompt. By default the system does have basic prompts enabled.

Inbound & Outbound Routes

The last two things required are Inbound and Outbound Routes. We will only be using or entering required information. Some fields or options are optional and may not be required.

For Inbound Routes, click Create New Inbound Route.

  • Select the trunk (if more than one is available).
  • In the DID Pattern add the numbers or DIDs that will be receiving calls to the given SIP Trunk.
  • Select a Privilege Level
  • Select Default Destination
  • Click Save

Time Conditions can be set if needed. Inbound Routes can be used for multiple DIDs where users might need their own DID. If DIDs share the same Inbound Route, multiple DIDs can be entered in the DID Pattern, such as a main number and a toll free number. Patterns should be eleven digits. e.g.: 18005559876.


For Outbound Routes, click Create New Outbound Route.

  • Assign a name for the Outbound Route (Domestic)
  • Add patterns for the route
  • Select a Privilege Level
  • Select Trunk
  • Click Save

Call Patterns

Patterns for the route can created as needed. It is important to consider 911 for emergencies. If the user needs to make international calls also consider creating an Outbound Route for international Calls.




By default the system is set to ignore voicemails shorter than three seconds. Because some messages may be shorter than three seconds, the system will ignore those e-mails and the user will not receive those voicemails. To correct this, the minimum Effective Message Time needs to be set to No minimum. This way, any and all voicemails will be delivered by the system.

To do this, go to PBX --> Call Features --> Voicemail --> Min Effective Message Time. Change to No Minimum and click Save (and apply changes at top right).



It is also recommended to create a backup and change the default password. To create a backup, go to Maintenance, then Backup, and select Local Backup. From the Manage Configuration Backups, select what needs to be backed up. By default the Config-File has been selected. To create, click Create New Backup. Once created, the file can be downloaded. It is a good idea to keep the backup available off the PBX, incase the device fails.

To change the default password, go to Settings, then Change Password. Enter the Old Password, then Enter and Retype the New Password. Please note that no one other than the person creating the new password will know the new password. If the password is forgotten, it may be necessary to do a factory reset.

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