A rule could be set to is something to execute when a trigger is fired (any local event).

An incoming call is a local event.

Set a RULE to perform a LINK at incoming calls

Use the API to push commands into the command queue associated with remote device.

Make a phone call to the remote device.

All the actions defined for incoming calls will take place.

Incoming call is an event itself, you may decide to answer on not (no charges).

The device opens the connection to server - if not already connected - uploading data and downloading pending commands (if any), leaving the connection open.

The connection could be closed by network operator after an inactivity period.

Updated information are publicly available.

Messages (if any) are sent to recipients.