Cape Town - The National Union of Metalworkers of South Africa (Numsa) on Saturday called on Saps to ensure that 10111 call centre workers were fairly remunerated.
A long running wage dispute came to a head this week, when an estimated 5 000 workers at 10 111 call centres countrywide went on strike demanding better pay.
Saps had to use uniformed officers to man the call centres.
On Friday the South African Policing Union (Sapu) temporarily suspended its strike to give upcoming negotiations between Saps and Sapu at the Commission for Conciliation, Mediation and Arbitration (CCMA) a "chance to succeed".
"Sapu will attend the Monday CCMA meeting with an open mind. The suspension of the strike must not be viewed by management as a way of us giving in to their arrogance," said Sapu Secretary General Oscar Skommere on Friday.
On Saturday Numsa said workers at the 10111 call centre were not earning the same as other workers in government institutions who do the same kind of work.
"Numsa condemns this kind of unfair labour practice. This is precisely the kind of principle that employers in the engineering sector wish to impose on our members, which is why we are now on the verge of a nationwide strike," said the trade union's acting spokesperson Phakamile Hlubi in a statement.