Grandstream GXP 2000 & GXP 2020

Note: There is a known issue with Grandstream phones that have the recent 1.1 beta firmware loaded. These phones start experiencing large gaps of audio in the case of a dropped packet (conversely, most phones simply gloss over a single dropped packet).

Information from VoIP-Info can be found here


Grandstream now allows public download of documentation and software at:

Phone network configuration completed.

The following instructions assume your phone has successfully booted and completed network configuration including obtaining valid IP addresses for itself, an IP gateway and DNS servers either via DHCP, manual or other means (refer to your phone's documentation) and that your phone is running with factory defaults.

Phone is running firmware release or better.

You can find the firmware version your phone is currently running by using the "Menu" button on your phone and navigating to "Status". If you are running a version prior to, please upgrade your phone's software before proceeding (refer to your phone's documentation).

Step 1: Gather information for each user.

Each user has a set of credentials which will be needed to configure each phone. For each phone that you are configuring, obtain the following:

  • "SIP Address" (Address of Record)
  • "SIP Password"
  • "Auth Username"
  • "Username"
  • "Proxy/Domain"

You can find this information in the user detail pages under the "Users" tab in the "Phone Configuration" section.

Phone configuration section

Step 2: Log into your Grandstream phone through a web browser

When your phone is powered on and connected to your LAN, use a browser to navigate to the IP address of your phone. To locate the IP address of your phone, select "Menu" and then "Status". The IP address will be located on that informational page. The default password is "admin". Once you've logged in, you should see a page with the following heading.

Select "Account 1".

Select Account 1

Step 3. Enter your user information from Step 1.

For most setups, you will need to simply configure "Account 1". If you are trying to configure multiple users or multiple line appearances, you can repeat the steps below for each of the identities you are configuring.

Enter user information

  • Account Active: Yes
  • Account Name: Whatever you would like others to see when you call them.
  • SIP Server: "Domain"
  • Outbound Proxy: ""
  • SIP User ID: "Username"
  • Authenticate ID: "Auth Username"
  • Authenticate Password: "SIP Password"
  • Name: Whatever you would like others to see when you call them.

Click "Update" button.

Note: The phone has a timeout on the interface. If you hit "Update" and the phone returns to the login page and your changes were not saved, it timed out. Make your changes more quickly and hit "Update" to save them.

Step 4. Confirm that you have disabled all Network Address Translation (NAT) settings.

We handle all NAT related issues. So, make sure to turn off any NAT settings in order for your phone to communicate properly with our servers. Scroll to the bottom of the "Account 1" section.

Confirm the following settings:

  • Use DNS SRV: Yes
  • User ID is phone number: No
  • SIP Registration: Yes
  • Unregister on Reboot: Yes
  • Register Expiration: 10
  • Local SIP Port: 5060
  • SIP T1 Timeout: 1 sec
  • SIP T2 Interval: 4 sec
  • NAT Traversal (STUN): No, but send keep-alive
  • Turn off speaker on remote disconnect: Yes

In the following field under Account settings: Make sure Send DTMF: via RTP (RFC2833) is checked. Uncheck any other options.

Step 5. Confirm that your phone is registered.

In the Admin Portal, click on the "Users" tab. You will see a green "online" notation next to each user with a registered phone.


If you are experiencing trouble, double-check your settings as described above and be sure to verify that your password was entered correctly without any leading or trailing spaces. If you are still having problems with your phone configuration, please see our troubleshooting section for further help.


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