For VoLTE, check PUSCH BLER or PDSCH BLER in Drive Test?

Hi Friends,
For VoLTE performance, is it better to check PUSCH BLER or PDSCH BLER, in Drive Test?

Primarily both, for DL & UL audio quality.

No more than 10% in both, right?

Yes. VoLTE is just Data call, similar parameters and limitations apply.