[AsteriskBrasil] Problema Digium MFCR2

[Willy Romão]

Senhores,

Estou com um problema com a placa (Digium, Inc. Wildcard TE410P) 
trabalhando com a sinalização MFCR2.

Quando eu recebo ou efetuo ligação, após alguns segundos de ring ou de 
ligação atendida a ligação cai.

Segue abaixo um log do momento que a ligação entra na placa até o 
momento que ela cai.

--
New MFC/R2 call detected on chan 8.
MFC/R2 call offered on chan 8. ANI = 3132980600, DNIS = 0930, Category = 
National Subscriber
MFC/R2 call has been accepted on backward channel 8
     -- Executing [0930 em entrada:1] Dial("DAHDI/8-1", "SIP/7606,30,Tt") 
in new stack
   == Using SIP RTP CoS mark 5
     -- Called SIP/7606
     -- SIP/7606-00000005 is ringing
        > 0x7fe0ec007920 -- Probation passed - setting RTP source 
address to 192.168.10.210:4006
        > 0x7fe0ec007920 -- Probation passed - setting RTP source 
address to 192.168.10.210:4006
     -- SIP/7606-00000005 answered DAHDI/8-1
        > 0x7fe0ec007920 -- Probation passed - setting RTP source 
address to 192.168.10.210:4006
New MFC/R2 call detected on chan 14.
Chan 14 - Far end disconnected. Reason: Normal Clearing
MFC/R2 call disconnected on channel 14
MFC/R2 call end on channel 14
New MFC/R2 call detected on chan 14.
Chan 14 - Far end disconnected. Reason: Normal Clearing
MFC/R2 call disconnected on channel 14
MFC/R2 call end on channel 14
New MFC/R2 call detected on chan 14.
Chan 14 - Far end disconnected. Reason: Normal Clearing
MFC/R2 call disconnected on channel 14
MFC/R2 call end on channel 14
New MFC/R2 call detected on chan 14.
Chan 14 - Far end disconnected. Reason: Normal Clearing
MFC/R2 call disconnected on channel 14
MFC/R2 call end on channel 14
New MFC/R2 call detected on chan 14.
Chan 14 - Far end disconnected. Reason: Normal Clearing
MFC/R2 call disconnected on channel 14
MFC/R2 call end on channel 14
New MFC/R2 call detected on chan 14.
Chan 14 - Far end disconnected. Reason: Normal Clearing
MFC/R2 call disconnected on channel 14
MFC/R2 call end on channel 14
New MFC/R2 call detected on chan 14.
Chan 14 - Far end disconnected. Reason: Normal Clearing
MFC/R2 call disconnected on channel 14
MFC/R2 call end on channel 14
Chan 8 - Far end disconnected. Reason: Normal Clearing
MFC/R2 call disconnected on channel 8
New MFC/R2 call detected on chan 14.
   == Spawn extension (entrada, 0930, 1) exited non-zero on 'DAHDI/8-1'
MFC/R2 call end on channel 8
     -- Hungup 'DAHDI/8-1'
--

Segue abaixo os arquivos de configuração que utilizo:

[root em XXXX ~]# cat /etc/dahdi/system.conf
span = 1,1,0,cas,hdb3
cas = 1-15:1101
cas = 17-31:1101
echocanceller = mg2,1-31
loadzone = br
defaultzone = br

[root em XXXX ~]# cat /etc/asterisk/chan_dahdi.conf
[channels]
signalling=mfcr2
mfcr2_variant=br
mfcr2_get_ani_first=yes
mfcr2_max_ani=20
mfcr2_max_dnis=4
mfcr2_category=national_subscriber
mfcr2_call_files=yes
mfcr2_logdir=oi
mfcr2_logging=all
context=entrada
channel => 1-15,17-31

Outras informações:

S.O.: CentOS 6.5 (x86_64)
Placa: Digium, Inc. Wildcard TE410P
E1: Operadora OI R2
Driver: dahdi-linux-complete-2.5.1
*** versões mais novas do dahdi davam kernel panic no servidor ***

Antes de qualquer resposta,
Obrigado a todos.

-- 
Willy Romão