Yeastar TDM800 FXO hangup detection

Please help me with hangup detection problem.
I am in Armenia, and when from PSTN external caller hangs the call, Asterisk doesn’t detect it.

Uncomment the lines:
;busydetect=yes
;busycount=3

Connect the cable that comes from the power supply to the Yeastar TDM800.

here is my chan_dahdi.conf:

[trunkgroups]

[channels]
language=fr
context=from-zaptel
signalling=fxs_ks
rxwink=300		; Atlas seems to use long (250ms) winks
usecallerid=yes
hidecallerid=no
callwaiting=yes
usecallingpres=yes
callwaitingcallerid=yes
threewaycalling=yes
transfer=yes
canpark=yes
cancallforward=yes
callreturn=yes
echocancel=yes
echocancelwhenbridged=no
faxdetect=incoming
echotraining=800
rxgain=0.0
txgain=0.0
callgroup=1
pickupgroup=1

;Uncomment these lines if you have problems with the disconection of your analog lines
;busydetect=yes
;busycount=3


immediate=no

#include dahdi-channels.conf
#include chan_dahdi_additional.conf

Hi can you post your chan_dahdi.conf settings?