Yealink T28P


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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 Yealink Administrator's Guide) 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 pressing the Menu button, select Status then press Enter or simply press the "OK" button from the main screen. The firmware version should be the third item listed from the top. If you are running a version prior to, please upgrade your phone's software before proceeding (refer to your Yealink Administrator's Guide).

Phone Configuration

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 Yealink 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. You locate your phone's IP address by pressing the Menu button, then scroll to phone status, press Enter the IP&MAC addresses should be at the top or simply press the "OK" button from the main screen. The factory default administrative username for the phone is 'admin' and the factory default password is 'admin'.
Go to the "Account" tab.

Step 3. Enter your user information from Step 1.


  • Account Active > Select "On"
  • Label > The soft key label for this line
  • Display Name > Whatever you would like others to see when you call them.
  • Register Name > "Auth Username"
  • User Name > "Username"
  • Password > "SIP Password"
  • SIP Server> "Domain"
  • Enable Outbound Proxy Server> Select "Enable"
  • Outbound Proxy Server> ""

Enter user information

Scroll down to the bottom of the page and click on the "Confirm" button.

Step 4. Once the page has refreshed, scroll down the page and click onCodecs

Verify that the following are listed in the "Enable codecs" section:

  • PCMU
  • PCMA
  • G729
  • G722

Codecs section

Step 5. Confirm that your phone is registered.

Under the "Account" tab expand the "Basic" section and verify that "Register Status" displays "Registered" across from it

Confirm phone is registered 


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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