Running 15.5 SP3, I'm facing this issue. In the management console, there are several options where a prompt can be recorded (eg. for the intro prompt, voicemail etc). When I select record and an extension, that phone rings and the voice says 'please record a message after the beep and press hash/pound when done' (translated from Dutch, so it might say something a little different in English). Then you say what you want and press hash/pound. Sometimes the voice then says 'to store, press 0, to listen press 2 etc' and that is how it should be. But, about 70% of the time the voice then says 'there are no recordings/messages' and then hangs up, in that case the prompt hasn't been recorded... This has nothing to do with the length of the message recorded, and there is nothing in the log files indicating any kind of error. And in 30% of the times it works without issue. I'm now working around this by dialling the voicemail and selecting 'change welcome message' and recording it that way, the prompt is stored fine then and I can download it from the voicemail-page in the management interface and then upload it again where I do need it, but this is a bit cumbersome. What could be wrong here?