Using IOS Guaranteed Audio Video Conf. Bridge

Using UCM 8.6 and IOS 15.1, I've set up a Conference bridge of type "
Cisco IOS Guaranteed Audio Video Conference Bridge".  It is registered and everything looks good.  Will UCM use this same resource for standard, audio-only conferences?  Or do I need to also set up a "Cisco IOS Enhanced Conference Bridge"?
I've read through the SRND, but can't seem to find a good resource for configuring these features.
Thanx

Using UCM 8.6 and IOS 15.1, I've set up a Conference bridge of type "
Cisco IOS Guaranteed Audio Video Conference Bridge".  It is registered and everything looks good.  Will UCM use this same resource for standard, audio-only conferences?  Or do I need to also set up a "Cisco IOS Enhanced Conference Bridge"?
I've read through the SRND, but can't seem to find a good resource for configuring these features.
Thanx

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    192.168.0.40 - - [23/Jul/2011:12:47:25 +0200] "GET /websql/song01.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
    192.168.0.40 - - [23/Jul/2011:12:47:25 +0200] "GET /websql/song01.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
    192.168.0.40 - - [23/Jul/2011:12:47:25 +0200] "GET /websql/song01.mp3 HTTP/1.1" 304 - "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
    192.168.0.40 - - [23/Jul/2011:12:47:25 +0200] "GET /websql/song01.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
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    192.168.0.40 - - [23/Jul/2011:12:48:04 +0200] "GET /websql/song02.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
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    192.168.0.40 - - [23/Jul/2011:12:48:04 +0200] "GET /websql/song02.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
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    192.168.0.40 - - [23/Jul/2011:12:48:38 +0200] "GET /websql/song01.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
    192.168.0.40 - - [23/Jul/2011:12:48:38 +0200] "GET /websql/song01.mp3 HTTP/1.1" 304 - "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
    192.168.0.40 - - [23/Jul/2011:12:48:38 +0200] "GET /websql/song01.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
    192.168.0.40 - - [23/Jul/2011:12:48:40 +0200] "GET /websql/song01.mp3 HTTP/1.1" 304 - "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
    192.168.0.40 - - [23/Jul/2011:12:48:40 +0200] "GET /websql/song01.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
    Playing song2.mp3 again:
    192.168.0.40 - - [23/Jul/2011:12:49:12 +0200] "GET /websql/song02.mp3 HTTP/1.1" 304 - "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
    192.168.0.40 - - [23/Jul/2011:12:49:12 +0200] "GET /websql/song02.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
    192.168.0.40 - - [23/Jul/2011:12:49:12 +0200] "GET /websql/song02.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
    192.168.0.40 - - [23/Jul/2011:12:49:12 +0200] "GET /websql/song02.mp3 HTTP/1.1" 304 - "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
    192.168.0.40 - - [23/Jul/2011:12:49:12 +0200] "GET /websql/song02.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
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    Every file is downloaded again completely when playing it. So "AppleCoreMedia" (whatever this may be exactly, the QuickTime-plugin that is triggered by the HTML 5 audio-element I suppose?) either doesn't have access to the Application Cache or simply just doesn't realize the files in it. So if I switch my iPad to "Airplane Mode" now, the Safari is unable to access / load / play the files.
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