Yes, users can select the default number for making calls from SIP phones. Once you have allocated the number as a default number then the system will always initiate the call from the default number.
Steps to make the number your default number:
Through a Web App.
Step 1: Log in to the CallHippo dashboard and click on the Users section.
Step 2: In Users, click on the setting icon. As an Admin user, you can select any user for allocating the number.
Step 3: Go to the Allocate Numbers, first click on the number which you want to allocate to the user, and click on the Default Number to make that number a default number.
Step 4: Click on the Default Number to call from that number all the time.
Step 5: You will get a message when you have selected the default number.
Through a Web Dialer.
Step 1: Open the web dialer and click on the menu.
Step 2: Click on the Setting.
Step 3: Click on the Default Number.
Step 4: Now you can select which number you want to use for your calling purpose.