Combine Multi-Leg Flights into a Single Shipment

Dear OTM Community,

We are looking for a way to plan multi-leg flights in OTM. We have noticed that we have the option to enter Inter/Intra Air Connect Time on an AIRSCHEDULE rate service. But we don't know what this does and how this works.

Our requirement is to create direct flights in OTM and combine multiple direct flights into a single shipment. The shipment must be rated as if it were a direct shipment from source to destination.

Example:

Flight 1: HAM - FRA
Flight 2: FRA - JFK

Resulting shipment across both flights from HAM to JFK. 

Our itineraries for air freight have three legs. Consisting of a pre-carriage, the primary AIR leg and a post-carriage.