This is not strictly a 3CX specific post but maybe someone here is able to help me ?. A simple thing, in theory, that would impress my users is to assign custom ring tones to my Polycom phones (SPIP 450's and 650's). Now there are various resources out there that document this, Polycom specific documents and others on the Internet, but I'm having big trouble adding my custom wav files. First of all to make my life easier I've given up on using 3CX v9 to provision my phones, and I've gone over to using an FTP server as it gives me more flexibility (for example a big plus is that I'm now capturing log files from the phones and getting custom directory entries backed up to XML files). I've various wav files on the FTP server that I've tweaked myself using Audacity to get them in the correct format (16kHz, mono etc.), and created an additional cfg file just for setting up the sampled audio on the phones. Now the phones apply the cfg file, and my log files for them show that they are picking up the wav files, but they just won't play them and use the default tone instead. I'm stumped as to why this is occuring as I've tried to follow others advice to the letter, and even used just one wav file of 37KB just incase available memory on the phone was an issue. But still it won't work. Anyone else tried this ?. Thanks.