DTMF issue again

Hi All,

I still have some issues with DTMF… out of 10 call at least 2 of them face this problem,
I get double digits in the call, for example if the user press 1234567 i receive it as 12344567…

All calls are from pstn on zap… following are package versions and setup

Asterisk-1.6beta-4(not upgraded as it working fine) with zaptel-1.4-stackcleanup ( provided by digium, due to some bug in previous zaptel version)…

I have TE412p card with 4 E1’s terminated on it…

Is there any problem with this setup…

bellow is my zapta.conf file


[channels]
language=en
context=from-pstn
switchtype=euroisdn
pridialplan=local
prilocaldialplan=local
signalling=pri_cpe
usecallerid=yes
hidecallerid=no
callwaiting=yes
usecallingpres=yes
callwaitingcallerid=yes
threewaycalling=yes
transfer=yes
cancallforward=yes
callreturn=yes
relaxdtmf=yes
echocancel=no
echocancelwhenbridged=no
resetinterval=never
rxgain=0.0
txgain=0.0
callgroup=1
pickupgroup=1
immediate=no
dtmfmode=inband
group = 0
channel => 1-15
channel => 17-31
channel => 32-46
channel => 48-62
channel => 63-77
channel => 79-93
channel => 94-108
channel => 110-124


Regards
Nischal…