A phone call can not be created from an interactions facet of ticket.
SAP Cloud for Customer.
Reproducing the Issue
Logon in your system using fiori UI.
Go to the Service work center.
Go to the Tickets view.
Search for ticket LMN (where LMN represents the ticket id) and open it.
Go to the Interactions facet.
You can see there is option for Email/SMS/Portal, but no option for creating phone call.
There is no Phone Call creation option in the ticket's interactions facet.From the Interaction facet, you are only able to create/send e-mail, SMS or portal interactions.
If you want to created phone call, you need to create it from an Activities facet of the ticket .
Open the Ticket LMN and go to the Activities facet.
In the Phone Call section, click on the new phone call .
Save the newly created phone call.
Now if you go back to Interactions facet, you will be able to see this newly created phone call activity listed here .
New Phone Call , Tickets , Interactions facet , Activities facet , KBA , LOD-CRM-SRP-INT , Ticket Interactions , Problem