Southern is understood to have called an urgent meeting with the train drivers' union Aslef this afternoon in a desperate attempt to try to avert next week's industrial action. Up to 600 trains a day would be cancelled.
Around 1,000 drivers are set to start an indefinite overtime ban on Sunday.
The company is refusing to confirm the peace talks, but union sources say there has been contact with them.
Services will be in chaos for hundreds of thousands of passengers if the action goes ahead.
It is understood both sides will meet at lunchtime.
So far months of talks have failed to reach agreement over driver-only trains.