After pushback.....By this time, the start should be complete and the AFTER START checklist complete
ENG: Ground to cockpit, pushback complete, set park brake.
: Park brake set, start is complete you are cleared to disconnect.
ENG: Roger, pin removed, clearance on the right hand side, bye bye.
: Bye bye.
Sometimes we need to start one engine on the bay with ground air etc..and that will involve more procedures.
As for calling the cabin, none of our procedures really specify that we have to call them using the cabin interphone expect some emergencies, and there is no specific wording we have to use, so that is normally very casual speak.
Sorry I had to split this message up. My computer cannot seem to do long replies on this forum. Not sure why, it just times out.