The union representing school secretaries will meet Department of Education officials on Wednesday to discuss the issues behind industrial action due to begin two days later.
However Fórsa said the action will only be prevented if "credible proposals to end pay injustice" are put forward.
From next Friday, school secretaries who are members of Fórsa will refuse to interact with public sector databases. The action will affect Department of Education and Health Service Executive systems.
Among the information school secretaries will refuse to input is information required by the HSE for its screening programmes in areas such as dental, vision, and hearing.
Fórsa's Head of Education Andy Pike said that a "two-tier low-pay regime" for school secretaries had been in force for more than four decades, during which time the Department of Education had displayed "little if any serious engagement".
He said the union was willing to talk but that it did not detect any change of heart from the Department.
While a small minority of school secretaries are directly employed by the Department of Education, the majority are employed by individual school Boards of Management on precarious low-pay contracts.
They are obliged to sign on during school summer holidays and do not get sick pay or pensions.
Schools say they do not receive enough funding to be able to offer better contracts to secretaries.
In a recent ballot, 94% of Fórsa school secretaries voted in favour of the industrial action. They want to be directly employed by the State.
They will also engage in a short work stoppage at the start of the school day next Friday.
Fórsa balloted members after talks broke down earlier in the summer.
The Department of Education has said that it needs to establish the full current cost of the union's claim.
It said the claim will be considered once costings have been determined.
