How to configure Speed Dial in GSM VoLTE Gateway?

     Speed Dial

               Speed Dial is a function that allows the user to place a call by pressing a reduced number of keys (speed dial code).

              1. Go to Call Feature and click on Speed Dial.
               2. Now Go to Add and add extension, Speed Dial Code and enter Destination. 
               3. When you Dial Speed Dial Code from extension it will land on Destination number.