Is yourmuze.fm using rtsp protocol specified in rfc 2326 or is it customized?

I am working on a project where we are trying to stream audio files to our BlackBerry users using Wowza Media Server using rtsp urls but devices cannot play the files. We explained as a test, we could stream yourmuze.fm to our test blackberry devices. Research in Motion (RIM) wants me to confirm if yourmuze.fm is using rtsp protocol specified in rfc 2326 or is it customized.

I have written the RTSP server that we are using. As far as i'm aware, it's fully compatible with RFC 2326, without any special customizations.

RTSP is just the 'control protocol' the player uses to send commands (play, stop, etc) to the server. The actual audio or video data can be sent using several codecs, transports, etc.

Yourmuze.FM sends the actual audio data as LATM encapsulated AAC+ in RTP packets over UDP (RTP/AVP/UDP). This is in accordance with the 3GPP streaming specifications.