A Start block indicates the start point of an application or module. Therefore, all applications and modules have a Start block. This block automatically appears in the callflow of any new application or module.
A secondary purpose of a Start block is to read attached data fields from a CTI-enabled system. You can specify the names of the fields you want to read, and the values are stored as variables that can be accessed in your callflow using Script blocks.
Start blocks cannot be removed from a callflow.