Which kernel is used in fitcecoc, a multiclass mode for support vector machines

i have read the detailed description available here https://it.mathworks.com/help/stats/fitcecoc.html#bue3ojr-2 again and again but i can't seem to understand which kernel is being used in fitcecoc SVM classifier by default?

I understand that fitcecoc is a binary classifer that is it uses K(K – 1)/2 binary support vector machine (SVM) models using the one-versus-one coding design but i can't understand which kernel is used by default?