Elevator control system overlay system

A method for providing destination dispatch service in an elevator control system, comprising:

• recording a primary destination dispatch request from a primary passenger at a first floor position via a destination dispatch controller;
• identifying a terminal floor;
• providing a terminal floor call signal to the elevator control system via an overlay controller;
• moving an assigned elevator car in a travel direction of the terminal floor;
• recording at least one secondary destination dispatch request from a secondary
• passenger at a respective at least one secondary floor position via the destination dispatch controller;
• approximating a position of the assigned elevator car;
• determining an target floor position via the destination dispatch controller;
• entering an target floor call corresponding to the target floor position at a calculated time to stop the assigned elevator car at the target floor position;
• cancelling all pending calls via the elevator control system;
• and
• entering at least one recorded destination dispatch request to the elevator control system.