If your are using MGU boards you can loa the file to MGU (use Manager Provisioning)
The recording format is Pulse Code Modulation (PCM), according to ITU-T recommendation G.711 (A- or m-law, mono, sampling frequency 8000 Hz).
RAMDI:ANN=xx,,MSG=xx;
RACEI: DIR=yy,CONT=xx;
ASPAP Parnum 161
see also ALEX description "Recorded Voice Announcement INSTALLATION INSTRUCTIONS" (2/1531-ANF 901 14 Uen G5 2013-07-26)
best regards,
Norbert