You can configure Moh under CME as below

 

telephony-service

no auto-reg-ephone

cnf-file location flash:

max-conferences 8 gain -6

moh enable-g711 "flash:/MOH.AU" <------------------- replace MOH.AU with your MOH File

web admin system name admin secret 5 $1$UzRJ$.AJ7pixot9P3vCH1m5qXa.

transfer-system full-consult

create cnf-files version-stamp