The simplest way to edit the DSS or Line Keys on a Yealink phone, is to do it through a web browser.
If you do not know the IP address of your phone, please see the linked article below.
If you do not know how to connect to your phone with a web browser, please see the linked article below.
Only change / edit available line keys or keys you have edited before. Replacing a line key which is required for another function may require factory resetting the phone to repair the change. Please ensure initial setup and programming / customization is complete prior to changing your DSS keys manually.
Please review all these steps before starting. As applicable refer to the image below:
Log in to the phone interface through a web browser.
Click the Dsskey tab.
Note on the left you will see "Line Key" ranges. Click the one which includes the key you want to edit.
Editable line keys will have no label. They may be of 3 types:
Line (without a label is an unassigned line)
N/A which is completely unassigned
Speeddial which is an existing Speeddial
If required, change the Type to Speeddial
Enter a Value to dial
Enter a short Label which will display next to the button on screen
Optionally (only used if you have separate lines configured) select the applicable line. If you are unsure about this, select line 1 or leave the default.
A Direct Station Selection (DSS) key is used on a phone or sidecar to allow monitoring and/or direct dialing of an extension. These keys can also often be programmed as one touch dials for external numbers as well. Sometimes they are referred to as Busy Lamp Field (BLF) keys.
Click word for more details
Internet Service Provider - the company providing connectivity to the Internet.
Wide Area Network - an interconnection of LAN's often depending on dedicated connections or more commonly the Internet.
Internet Protocol - a larger protocol encompassing TCP, UDP, etc.
Information Technology (sometimes written as IT and often replacing IS for Information Systems).