Get position for a given moment with remote API

Hello,

We are currently using the Wialon Remote API to get the last position (with timestamp) emitted by all of our units.

However, if a connection problem arrives between our server and Wialon's, we might need to retrieve all the positions emitted by our units since a given moment (from a given timestamp in the past until now).

What's the best way to do so, using the Remote API? Can you please provide an example of the sequence of API calls to make, with their correct parameters, flags and all?

Thanks in advance!