Its a fact that different PABX vendors have set different file format for the music on hold files setup. You should convert the recorded music file to the defined format , before uploading it the system. Or Else PBX cant detect the music file and will be skipped when attempted to Play. Here we gives the format different systems have defined to configure music on hold .
Music On Hold File Format
CISCO: UC500 Series
G 711
8khz
8bit
.au or .wav
CISCO: CUCM
16-bit
PCM wav file
Stereo or mono
Sample rate 8-48 kHz
NEC:
CCITT A Law
8khz
8bit
mono
PANASONIC:
IMA ADPCM
8khz
4bit
mono
AVAYA:
Wav
8khz
16bit
PCM Mono
Mitel | Shoretel :
CCITT μ-Law
8 KHz
8-bit
mono WAV
3cx
Format: WAV
Channel: Mono
Bit rate: 8 kHz
Sample: 16 bit
Lync | skype for business
Media Audio 9
44 kHz
16 bits
Mono CBR
32 kbps
.wma or .wav
FreePBX
.wav or mp3
For stream U law,G 722
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