IPO Blocking Calls

Blocking calls on IPO
Use Shortcode *52 Clear Call
Create incoming call route with number you want to block and assign it *52

IPO Media Files

IP Office media WAV formats need to be 16-bit PCM, 8KHZ Mono, sampling rate 128kbits/sec.

I know Audacity is another favorite but I cannot get on with it and tend to get mixed results with audio quality so I tend to use Switch Audio File Converter from nch software.