Frequent Call Drops

Hi,

Anyone experience call dropping especially incoming call from pstn to *? my users complaining one drop per 20 munites (average) of conversation. Some even one drop per 3 munites.

Any help is very much appreciated.

my zapata.conf

[channels]
language=en
context=default
switchtype=national
signalling=fxs_ks
faxdetext=incoming
context=from-pstn
echocancel=yes
callprogress=yes
busydetect=yes
busycount=8
rxgain=0.0
txgain=0.0
echocancelwhebridged=no
echotraining=800
group=0
channel=>2-4
channel=>6-8

my zaptel.conf

fxsks=2-4
fxsks=6-8
loadzone=sg
defaultzone=sg

rgds
CS

What do you have in extensions.conf?
You should check the timeouts.