1. Access the IP Phone’s Web Interface

1. Find the IP Address: On the IP phone, access the menu to find its IP address. This is usually under the network settings or status information.
2. Open a Web Browser: Enter the IP address of the phone into a web browser to access the phone’s web interface. You might need to log in with the admin credentials.

2. Log In to the Web Interface

1. Enter Credentials: Use the admin username and password. If you haven’t changed these from the default settings, they might be something like admin / admin, or you might find them in the phone’s manual.

3. Locate Codec Settings

1. Navigate to Audio/Codec Settings: Look for a section related to audio settings, codec settings, or SIP settings. This might be under tabs like “Call Settings”, “Audio Settings”, or “SIP Configuration”.

4. Configure Codecs

1. Select Codecs: You’ll typically find a list of available codecs. Common codecs include G.711, G.729, G.722, and Opus. Check or uncheck the boxes to enable or disable specific codecs based on your needs.
2. Adjust Codec Order: Some interfaces allow you to set the order of preference for codecs. This determines which codec is used first if multiple codecs are available.

5. Save and Apply Changes

1. Save Settings: After selecting the desired codecs and settings, make sure to save or apply the changes. This might require clicking a “Save” or “Apply” button.

6. Reboot the Phone (If Necessary)

1. Restart: Some changes might require the phone to be restarted for them to take effect. Check if there’s an option to reboot the phone from the web interface.

7. Verify Configuration

1. Test Calls: Make a few test calls to ensure that the new codec settings are working as expected and that call quality is satisfactory.

Audio Codecs

G722 – High Quality

G711A – Standard Quality

G727 – Low Quality, High Speed

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