HTC Touch (CDMA) / XV6900

I love this phone but I use it as a pager also and am worried that without a sound notification after the initial text sound notification - that I wont wake up and might miss an important page. All of the other platforms I have experiences have a chime of some type that keeps reminding you of a text or phone call that was missed - How can I get windows mobile pro (touch) to perform this function? Is there any download available?

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