What is the ICAO equivalent of a "point out"?
We have an aircraft that is transitioning through someone else's airspace that we want to talk to we do a "point out".
  


Basically you want to grab the attention of the other controller wrt a particular plane that they are controlling (or unaware of), in ICAO 4444 lingo that's a General Point message:


  11.4.2.5.19 GENERAL POINT MESSAGES The General Point message shall be transmitted to draw the attention of the controller receiving the message to a flight to support voice coordination. The General Point message shall include details of a flight that may have been previously unknown to the receiving unit, to permit it to be displayed if required. This may include, for example, a flight that had planned to operate in airspace under the control of one ATS unit requesting climb or diversion into airspace controlled by another ATS unit which has no details of the flight.