asterisk users - Apr 2011 - FILTER function and multiple ranges?

I am trying to use the FILTER() function to strip out "/" from a CID
name.  I have the following in my extensions.conf where I want to
perform the filtering:

exten => s,n,Set(NAME=${FILTER(\x20-\x2e\x30-\7d,${DIAL_NAME})})

However, when ${DIAL_NAME} is, say, "J & J DOE" the string
resulting
from the FILTER() is " &  ".  It would appear that only the first
range
is being considered.  Do I have the syntax for FILTER() correct?  If so,
is the result that I am seeing the intended behavior or a bug?

Cheers,
b.

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