Instructions on setting up compatible Yealink IP Phones
The Yealink T4XG series is no longer in production but it still a functional and fairly up to date phone that can be picked up cheaply on EBay. They're highly flexible, configurable but lack support for modern codecs such as Opus.
These settings may well apply to other Yealink devices.
To find the IP address of your phone navigate to the following menu using the buttons on the phone:
Menu Soft Key > Status
Type the IP into your browser and you should be presented with the configuration web interface. The default credentials are admin / admin
It's important to update the password from the default as soon as possible. In the web interface go to
Security > Password and update it to something secure.
Settings > Time&Date in the web interface and set it up as shown below, adjusting your Timezone if required:
Account in the web interface and select an account that's not in use. Use the following screenshots as a guide to configuring the line, using your assigned Extension Number and Password:
Once you've setup your account, click on Codecs on the left to set codec priority. These phones don't support Opus so we prioritise G722 for “HD” Voice Quality:
To configure the LDAP Directory navigate to
Directory > LDAP in the web interface and complete as shown in the screenshot below. Note the directory is unauthenticated so username and password can be set to anything. See the notes underneath for the cropped fields.
You then need to add the LDAP directory to the list of available directories. Navigate to
Directory > Setting in the web interface and complete as shown in the screenshot below:
To use the Directory, press the Directory key on the phone and select the OARC option. You can then scroll through the entries, or search.