Irish Life staff belonging to the Unite trade union have held their fourth weekly two-hour stoppage this lunchtime in a dispute over pay and collective bargaining rights.
Unite, which says it represents 1,100 of Irish Life's 2,200 employees, announced that it is to convene a general meeting of members on Monday to determine a possible escalation of the dispute.
The union's Dundalk-based members will meet on Tuesday.
The union is protesting about what it describes as Irish Life's unilateral imposition of a new performance-based pay model which breaks the link between pay and inflation.
It argues this would leave around three-quarters of Irish Life workers with no pay increases for the foreseeable future.
Traditionally, Unite has negotiated on behalf of around 650 staff in lower grades in the company, but says that increasing numbers of higher grades have joined and want to be represented by the union.
However, it accuses management of refusing to negotiate collectively for those higher specialist and managerial grades.
It has also accused the company of refusing to attend the Labour Court in respect of all its workers - not just clerical staff - and warned this may lead to an escalation of the dispute.
Irish Life said it was regrettable that agreement had not yet been reached following a Labour Court recommendation to move from an incremental pay model to a new performance based salary structure for clerical staff.
The company said it was disappointed that Unite had decided to take industrial action without putting the company's final offer to a ballot of members.
It said that offer included performance-linked pay increases ranging from 2-15% for lower paid clerical staff, as well as in increase in bonus ranges up to 8%.
It also said that for clerical staff who did not wish to move to performance pay from increments, there would be cost of living increases at the higher end of the salary scale up to €56,500 of 2% in 2015 and a further 2% in 2016.
Further cost of living increases would then be negotiated.
The company accepts that it has traditionally engaged in collective bargaining with Unite on behalf of 650 clerical personnel.
However, it notes that the majority of their 2,300 employees are specialists and managers who have always had annual pay reviews based on individual performance and market rates - without collective bargaining through a union.
It said the company has already committed minimum salary increases for this group of between 1 and 2% from 2016 - 2018 as part of the transition to the new performance based system.
Irish Life accuses Unite of seeking to change the long established mechanisms for pay reviews for specialists and managers who have not previously been covered by collective bargaining on pay.
The company confirmed it was prepared to go to the Labour Court - but only to discuss the pay of the 650 clerical employees.
