To create a custom contact on the phone.

For Yealink Phones

Press Menu.

Press Directory.

Click Add.

Enter contact information.

Click Save.

For Polycom Phones

Press Directory (may have to press More button to see the option).

Press Select on Contact Directory.

Press Add.

Enter the contact info.

Press Save.

Some phone models may differ in the procedure. Please refer to the owners manual for more specific details.