[Asterisk-Users] Faxdetect does not detect certain Fax machines

[Frank]

I have found certain fax machines that are not detected by Faxdetect
feature.  The tones that are made by the calling fax machine sound more
like a worrble than the typical beep.

I documented the make/model and captured the sounds made by the calling
fax machine in the bugs database at 

http://bugs.digium.com/bug_view_page.php?bug_id=0002165

any advice?