asterisk users - Oct 2005 - polycom ip500 mwi, quite please

Does anyone know how to silence the audible mwi on
a soundpoint ip500 or ip501 running sip 1.4.1?

I tried changing just about all the se.pat.callProg.11
vars and nothing seems to change.

-- 
Bob Knight
[-w] the work option
bk@minusw.com
925-449-9163