This is more of a general question, but I have a local PBX (Zultys MX250) that allows for music on hold. The quality of the playback is utter crap, but only when you call in from the street. I've noticed that this seems to be fairly common with ANY phone system, but any suggestions would be great The source is a wav file held on the PBX itself and originated as an mp3 (an original by a coworker) that I used audacity to convert to:
Microsoft Wav (Header)
We're US (T1) so I assume we us u-law (I've read that a-law is used on E1 circuits).
Any ideas? Would it make any difference using a different program to encode?