asterisk users - Nov 2003 - OSS/dsp sound problem

Need a little help/pointer on this one...

RH v9, Asterisk CVS-11/11/03-13:46:29 
Multiple sip phones, cisco, snom, all work fine with MOH, VM, etc.
IAX working fine, meetme, etc, etc.

Trying to implement overhead voice paging via the * sound card.