[asterisk-r2] Drop calls before eighth call

[Diego Ocampo]

Hi everyone, I've experimented that before the eighth call, incoming
or outcoming, the calls begin droped. The provider deliver 12
channels.

My config:

dahdi\system.conf

span=1,0,0,cas,hdb3
cas=1-12:1101
dchan=16

# Global data
loadzone       = ar
defaultzone    = ar

asterisk\chan_dahdi.conf

[channels]
context=from-pstn
switchtype=national
;signalling=pri_cpe
;rxwink=300 ; Atlas seems to use long (250ms) winks
usecallerid=yes
hidecallerid=no
callwaiting=yes
callwaitingcallerid=yes
threewaycalling=yes
transfer=yes
cancallforward=yes
echocancel=yes
rxgain=0.0
txgain=0.0
;immediate=yes
language=es

resetinterval=never
context=from-pstn
group=0
echocancel=yes
signalling=mfcr2
mfcr2_variant=ar
mfcr2_get_ani_first=no
mfcr2_max_ani=10
mfcr2_max_dnis=4
mfcr2_category=national_subscriber
mfcr2_mfback_timeout=-1
mfcr2_metering_pulse_timeout=-1
mfcr2_dtmf_detection=1
mfcr2_dtmf_dialing=1
mfcr2_call_files=yes
mfcr2_logging=all
mfcr2_logdir=span1
channel => 1-12

I have not idea where to look

I appreciate your help


Thaks

P.D.: Sorry for my english.