Is it possible on CN to configure GBR related to voice codec?

Hi everyone.

I am facing an issue to enable a new codec (7.4kbps) in 3G network.

  • On the RAN side (Nokia/Huawei) everything has been done but no attempts on 7.4.
  • On CN (Huawei) they are showing messages containing 7.4.
  • From 3GPP standard codec is adjusted based on GBR.

So I want to know: is it possible on CN to configure GBR related to voice codec?