asterisk users - Jul 2004 - "unclean hangups" can I turn off hook flash?

I'm having problems with unclean hangups (being read as a flash instead 
of a hangup?).

Can I turn off hook flash recognition in asterisk, but still have the 
flash button on the analog phone operational?

Could I use these settings in zapata.conf to fix my problem?
*prewink*: Sets the pre-wink timing.
*preflash*: Sets the pre-flash timing.
*wink*: Sets the wink timing.
*rxwink*: Sets the receive wink timing.
*rxflash*: Sets the receive flash timing.
*flash*: Sets the flash timing.
*start*: Sets the start timing.
*debounce*: Sets the debounce timing. "The debounce settings in the 
Asterisk configuration affects how Asterisk
handles hookswitch transitions on its FXO/FXS interfaces."

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