[asterisk-users] DAHDI and hangup issue when playing the IVR

[Tharanga]

Good day ,

I have configured TDM410P (asterisk 1.6.x) on Cent OS 5, but dahdi take 
some time to hangup the call when playing the IVR..(it will send the 
hangup signal after finishing the IVR promt..)
is there any specific setting to avoid such incidents ? iam  using 
busycount as 3,

signalling=fxs_ks
;toneduration=100
callwaiting=yes
threewaycalling=yes
callreturn=yes
echocancel=128,param1=32,param2=0,param3=14
echocancelwhenbridged=yes
echotraining=yes
echotraining=800
busycount=3
hanguponpolarityswitch=yes
ringtimeout=8000
group=1
context=incoming
immediate=yes
jitterbuffers=4
jbenable = yes
echocancel=yes
channel=>1-4
;overlapdial=yes
;pulsedial=yes
dtmfmode=rfc2833
;relaxdtmf=yes
;rxgain=10.0
;txgain=8.0

any ideas please!
Thanks,
Tharanga Abyeseela