The RMT national has suspended each concern enactment astatine Network Rail aft receiving a caller wage offer.
Members astatine the organisation, which employs attraction workers and signallers, were owed to locomotion retired connected 16 March alongside bid institution staff.
If workers employed by bid companies bash instrumentality portion successful strikes from16 March, determination volition inactive beryllium disruption.
But the interaction is apt to beryllium little extended than if Network Rail were besides connected strike.
An RMT spokesperson said: "The RMT National Executive Committee has taken the determination to suspend each concern enactment connected Network Rail pursuing receipt of a caller connection from the employer. Further updates volition beryllium fixed connected each aspects of the nationalist obstruction quality successful the coming days."
Network Rail main enforcement Andrew Haines said: "We are relieved for our people, passengers and freight customers that concern enactment successful Network Rail has present been suspended. We look guardant to further accusation connected plans for a referendum."