With the Alcatel OmniPCX Enterprise (OXE) R12.4, problems occur during the connection state or switching operations with the audio transmission. The audio transmission is disturbed, i.e. parts of the audio transmission are missing.
According to our knowledge (June 2021), the hotfix "HF_CROXES-27134_m5204.36_2" must be explicitly requested from Alcatel.
A fix is expected with Alcatel OmniPCX Enterprise (OXE) Release N1 R100.0 (expected availability October 2021).