The union said the negotiations took a turn after Samwu and the Independent Municipal and Allied Trade Union received an offer.
Disgruntled employees protested on Monday over delays in the processing of their January paychecks.
Employees downed tools over unpaid salaries on Monday morning. Some took to the streets in protest and spread rubbish in parts of the city.
Workers were demanding an increase of 9% while the university was offering 6.3%.
The National Union of Metalworkers of South Africa is leading the industrial action.
Numsa's Phakamile Hadebe said the university was violating the principle of equal pay for work of equal value.
The union has been on strike for a week over pay and office space at Metrobus offices.
They are demanding an 8% increase, while the company is offering no increase.
The doctors warn that current fuel shortages and poor pay may still hamper their ability to report for work.
Last week, the court ruled in favour of the union saying its strike at the gold mine is legal.
Workers in the plastic sector are demanding a 15% wage increase and a reversal of the decision to pay workers R20 an hour instead of R40.
About 10,000 workers affiliated to the union are on an indefinite strike over wage increases and working conditions.
The NUM and Numsa will go on a one-day strike over Eskom’s decision not to increase salaries this year.
Last week, wage negotiations at Eskom collapsed after unions walked out.
However, there have been a few isolated incidents where protesting workers tried to block the entrances of power stations.
More than 100,000 PSA-affiliated union members are expected to go on strike on Monday.
Numsa and Nehawu affiliated staff at Wits University are on strike calling for a 12% hike.
The disgruntled workers currently earn R79 per day and are asking for an increase of at least R90 per day.
