[asterisk-users] BUSYDETECT_* flags

[Phillip Neumann]

Hello all,

I have asterisk-1.4.25, and having some problems with analog lines  
becouse my Telco does not have "disconnect supervision".

So, i realize there are some switches on main/dsp.c:

BUSYDETECT_MARTIN, BUSYDETECT_TONEONLY, and  
BUSYDETECT_COMPARE_TONE_AND_SILENCE.

As far as i could read on the web, some people has use this to solve  
the "asteriks not hanging up" problem, and want to try them.

I dont see anything about this on any Makefile, how do i enable thouse  
flags?
Or is it that they are obsolete now?

Thanks!