You can use the interflow-qpos conditional in a route-to or goto command to achieve First In, First Out (FIFO) results.
For example, you can use the following route-to command with the conditional to achieve FIFO results:
route-to number 9581234 with cov n if interflow-qpos=1
If you have a lot of remote agents, set the route-to command as follows:
route-to number 9581234 with cov n if interflow-qpos<=2